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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Ordo: Asparagales

Familia: Asphodelaceae
Subfamilia: Asphodeloideae
Genus: Aloe
Sectiones: A. sect. Aloe – A. sect. Aloinella – A. sect. Leptaloe

Overview of species

A. aaata – A. aageodontaA. abyssicola – A. abyssinica – A. aculeata – A. acutissima – A. adigratana – A. affinisA. africana – A. ahmarensis – A. albidaA. albiflora – A. albostriata – A. albovestita – A. aldabrensis – A. alexandrei – . alfredii – A. alooides – A. ambigens – A. ambositrae – A. ambrensis – A. amicorum – A. ammophila – A. ampefyana – A. amudatensis – A. analavelonensis – A. andersonii – A. andongensis – A. andringitrensis – A. angelica – A. anivoranoensis – A. ankaranensis – A. ankoberensis – A. anodonta – A. antandroi – A. antoetrana – A. antonii – A. antsingyensis – A. arborescens – A. archeri – A. arenicola – A. argenticauda – A. argyrostachys – A. armatissima – A. arneodoi – A. asperifolia – A. aufensis – A. aurelienii – A. austroarabica – A. austrosudanica – A. babatiensis – A. bakeri – A. ballii – A. ballyi – A. barbara-jeppeae – A. bargalensis – A. beankaensis – A. belavenokensis – A. bella – A. bellatula – A. benishangulana – A. berevoana – A. bergeriana – A. bernadettae – A. bernardii – A. bertemariae – A. betsileensis – A. bicomitum – A. boiteaui – A. boscawenii – A. bosseri – A. bowiea – A. boylei – A. braamvanwykii – A. brachystachys – A. branddraaiensis – A. brandhamii – A. brevifolia – A. breviscapa – A. broomii – A. brunneodentata – A. brunneostriata – A. bruynsii – A. buchananii – A. buchlohii – A. buettneri – A. buhrii – A. bukobana – A. bulbicaulis – A. bulbillifera – A. bullockii – A. burgersfortensis – A. bussei – A. butiabana – A. calcairophila – A. calidophila – A. calliantha – A. cameronii – A. camperi – A. canarina – A. candelabrum – A. canis – A. cannellii – A. capitata – A. capmanambatoensis – A. carnea – A. carolineae – A. castanea – A. castellorum – A. castilloniae – A. cataractarum – A. catengiana – A. chabaudii – A. charlotteae – A. cheranganiensis – A. chlorantha – A. chortolirioides – A. christianii – A. chrysostachys – A. cipolinicola – A. citrea – A. citrina – A. clarkei – A. classenii – A. claviflora – A. collenetteae – A. collina – A. comosa – A. compressa – A. comptonii – A. condyae – A. confusa – A. congdonii – A. conifera – A. cooperi – A. corallina – A. craibii – A. crassipes – A. cremnophila – A. cryptoflora – A. cryptopoda – A. cyrtophylla – A. dabenorisana – A. darainensis – A. dawei – A. debrana – A. decaryi – A. decorsei – A. decurva – A. deinacantha – A. delicatifolia – A. delphinensis – A. deltoideodonta – A. descoingsii – A. deserti – A. dewetii – A. dewinteri – A. dhufarensis – A. diolii – A. distans – A. divaricata – A. djiboutiensis – A. doddsiorum – A. dominella – A. dorotheae – A. downsiana – A. droseroides – A. duckeri – A. dyeri – A. ecklonis – A. edouardii – A. elata – A. elegans – A. elegantissima – A. elgonica – A. elkerriana – A. ellenbeckii – A. eremophila – A. erensii – A. ericahenriettae – A. ericetorum – A. erinacea – A. erythrophylla – A. esculenta – A. eumassawana – A. excelsa – A. eximia – A. falcata – A. ferox – A. fibrosa – A. fievetii – A. fimbrialis – A. fleurentiniorum – A. fleuretteana – A. flexilifolia – A. florenceae – A. forbesii – A. fosteri – A. fouriei – A. fragilis – A. francombei – A. friisii – A. fulleri – A. gariepensis – A. gautieri – A. gerstneri – A. ghibensis – A. gilbertii – A. gillettii – A. glabrescens – A. glauca – A. globuligemma – A. gneissicola – A. gossweileri – A. gracilicaulis – A. graciliflora – A. grandidentata – A. graniticola – A. grata – A. greatheadii – A. greenii – A. grisea – A. guerrae – A. guillaumetii – A. haggeherensis – A. hahnii – A. hardyi – A. harlana – A. haroniensis – A. haworthioides – A. hazeliana – A. helenae – A. heliderana – A. hemmingii – A. hendrickxii – A. hereroensis – A. heybensis – A. hildebrandtii – A. hlangapies – A. hoffmannii – A. humbertii – A. humilis – A. huntleyana – A. ibitiensis – A. ifanadianae – A. ikiorum – A. imalotensis – A. immaculata – A. inamara – A. inconspicua – A. inermis – A. inexpectata – A. integra – A. inyangensis – A. irafensis – A. isaloensis – A. ithya – A. ivakoanyensis – A. jacksonii – A. jawiyon – A. jeppeae – A. jibisana – A. johannis – A. johannis-bernardii – A. johannis-philippei – A. jucunda – A. juvenna – A. kahinii – A. kamnelii – A. kaokoensis – A. karasbergensis – A. kedongensis – A. kefaensis – A. ketabrowniorum – A. khamiesensis – A. kilifiensis – A. knersvlakensis – A. kniphofioides – A. koenenii – A. komaggasensis – A. komatiensis – A. kouebokkeveldensis – A. krapohliana – A. kraussii – A. kulalensis – A. kwasimbana – A. labworana – A. laeta – A. lanata – A. latens – A. lateritia – A. lavranosii – A. leachii – A. leandrii – A. leedalii – A. lensayuensis – A. lepida – A. leptosiphon – A. lettyae – A. liliputana – A. lindenii – A. linearifolia – A. lineata – A. littoralis – A. lolwensis – A. lomatophylloides – A. longibracteata – A. longistyla – A. luapulana – A. lucile-allorgeae – A. lukeana – A. luntii – A. lutescens – A. macleayi – A. macra – A. macrocarpa – A. macroclada – A. macrosiphon – A. maculata – A. mahraensis – A. manandonae – A. mandotoensis – A. mandrarensis – A. marlothii – A. martialii – A. massawana – A. mawii – A. mayottensis – A. mccoyi – A. mcloughlinii – A. medishiana – A. megalacantha – A. megalocarpa – A. melanacantha – A. mendesii – A. menyharthii – A. metallica – A. meyeri – A. micracantha – A. microdonta – A. microstigma – A. millotii – A. milne-redheadii – A. minima – A. miskatana – A. mitsioana – A. mocamedensis – A. modesta – A. molederana – A. monotropa – A. monteiroi – A. monticola – A. montis-nabro – A. morijensis – A. mossurilensis – A. mottramiana – A. mubendiensis – A. mudenensis – A. multicolor – A. munchii – A. murina – A. musapana – A. mutabilis – A. myriacantha – A. mzimbana – A. namibensis – A. namorokaensis – A. neilcrouchii – A. neoqaharensis – A. neosteudneri – A. newtonii – A. ngobitensis – A. ngongensis – A. nicholsii – A. niebuhriana – A. niensiensis – A. nigrimontana – A. nordaliae – A. nubigena – A. nugalensis – A. nuttii – A. nyeriensis – A. occidentalis – A. officinalis – A. oligophylla – A. omavandae – A. omoana – A. orientalis – A. orlandi – A. ortholopha – A. otallensis – A. pachydactylos – A. pachygaster – A. paedogona – A. palmiformis – A. parallelifolia – A. parvibracteata – A. parvicapsula – A. parvidens – A. parviflora – A. parvula – A. patersonii – A. pavelkae – A. pearsonii – A. peckii – A. peglerae – A. pembana – A. pendens – A. penduliflora – A. percrassa – A. perdita – A. perfoliata – A. perrieri – A. perryi – A. petricola – A. petrophila – A. peyrierasii – A. pictifolia – A. pienaarii – A. pirottae – A. plowesii – A. pluridens – A. polyphylla – A. porphyrostachys – A. powysiorum – A. praetermissa – A. pratensis – A. pretoriensis – A. prinslooi – A. procera – A. pronkii – A. propagulifera – A. prostrata – A. pruinosa – A. pseudoparvula – A. pseudorubroviolacea – A. pubescens – A. pulcherrima – A. purpurea – A. pustuligemma – A. rabaiensis – A. rapanarivoi – A. rauhii – A. rebmannii – A. reitzii – A. rendilliorum – A. retrospiciens – A. reynoldsii – A. rhodesiana – A. ribauensis – A. richardsiae – A. richaudii – A. rigens – A. rivae – A. rivierei – A. rodolphei – A. roeoeslii – A. rosea – A. rouxii – A. rubrodonta – A. rubroviolacea – A. rugosifolia – A. rugosquamosa – A. rulkensii – A. rupestris – A. rupicola – A. ruspoliana – A. ruvuensis – A. sakarahensis – A. saudiarabica – A. saundersiae – A. scabrifolia – A. schelpei – A. schilliana – A. schoelleri – A. schomeri – A. schweinfurthii – A. scobinifolia – A. scorpioides – A. secundiflora – A. seibanica – A. seretii – A. serriyensis – A. shadensis – A. sharoniae – A. sheilae – A. silicicola – A. simii – A. sinana – A. sinkatana – A. sobolifera – A. socialis – A. somaliensis – A. soutpansbergensis – A. speciosa – A. spectabilis – A. spicata – A. spinitriaggregata – A. springatei-neumannii – A. squarrosa – A. steudneri – A. striata – A. suarezensis – A. subacutissima – A. subspicata – A. succotrina – A. suffulta – A. suprafoliata – A. suzannae – A. swynnertonii – A. tartarensis – A. tauri – A. tegetiformis – A. teissieri – A. tewoldei – A. thompsoniae – A. thorncroftii – A. thraskii – A. tomentosa – A. tormentorii – A. tororoana – A. torrei – A. trachyticola – A. transvaalensis – A. trichosantha – A. trigonantha – A. trothae – A. tsitongambarikana – A. turkanensis – A. ukambensis – A. umfoloziensis – A. vacillans – A. vallaris – A. vanbalenii – A. vandermerwei – A. vanrooyenii – A. vaombe – A. vaotsanda – A. venenosa – A. vera – A. verecunda – A. versicolor – A. veseyi – A. viguieri – A. virginieae – A. viridiflora – A. vituensis – A. vogtsiiA. volkensiiA. vossii – A. vryheidensis – A. wanalensis – A. welmelensis – A. weloensis – A. welwitschii – A. werneri – A. whitcombei – A. wickensii – A. wildii – A. wilsonii – A. wollastonii – A. woodii – A. wrefordii – A. yavellana – A. yemenica – A. zebrina – A. zubb

Nothospecies: A. × anosyana – A. × buzairiensis – A. × caesia – A. × commutata – A. × hexapetala – A. × imerinensis – A. × keayi – A. × menachensis – A. × philippei – A. × puberula – A. × runcinata – A. × schimperi

Artificial nothospecies: A. × heteracantha
Name

Aloe L., Sp. Pl. 1: 319 (1753).
Type species: Aloe perfoliata L.' vide Britton & Millspaugh (1920)

Synonyms

Heterotypic
Lomatophyllum Willd., Mag. Neuesten Entdeck. Gesammten Naturk. Ges. Naturf. Freunde Berlin 5: 166. (1811)
Rhipidodendrum Willd., Mag. Neuesten Entdeck. Gesammten Naturk. Ges. Naturf. Freunde Berlin 5: 164. (1811)
Phylloma Ker Gawl., Bot. Mag. 38: t. 1585. (1813)
Pachidendron Haw., Saxifrag. Enum. 2: 35. (1821)
Agriodendron Endl., Gen. Pl.: 144. (1837)
Atevala Raf., Autik. Bot.: 136. (1840)
Busipho Salisb., Gen. Pl.: 76. (1866)
Chamaealoe A.Berger, Bot. Jahrb. Syst. 36: 43. (1905)
Type species: C. africana (Haw.) A.Berger
Chortolirion A.Berger in Engler, Pflanzenr. IV. 38 III, II (Heft 33): 72. (1908)
Type species: C. angolense (Baker) A.Berger
× Lomataloe Guillaumin, Bull. Mus. Natl. Hist. Nat., II, 3: 339. (1931)
Leptaloe Stapf, Bot. Mag. 156: t. 9300. (1933)
Aloinella (A.Berger) Lemée, Dict. Gen. Pl. Phan. 7(Suppl.): 27. (1939)
Guillauminia A.Bertrand, Cactus (Paris) 49: 46 (1956)
× Alchamaloe G.D.Rowley, Natl. Cact. Succ. J. 22: 74. (1967)
× Aleptoe G.D.Rowley, Natl. Cact. Succ. J. 22: 74. (1967)
× Allauminia G.D.Rowley, Natl. Cact. Succ. J. 22: 74. (1967)
× Aloella G.D.Rowley, Natl. Cact. Succ. J. 22: 74. (1967)
× Leptauminia G.D.Rowley, Natl. Cact. Succ. J. 22: 74 (1967).
× Chamaeleptaloe G.D.Rowley, Natl. Cact. Succ. J. 28: 7. (1973)
× Leptaloinella G.D.Rowley, Natl. Cact. Succ. J. 28: 7. (1973)
× Alleptauminia D.M.Cumming, Bull. African Succ. Pl. Soc. 9: 40. (1974)
× Alamaealoe P.V.Heath, Calyx 3: 153. (1993)
× Allemeea P.V.Heath, Calyx 3: 153. (1993)
× Aloptaloe P.V.Heath, Calyx 3: 153. (1993)
Lemeea P.V.Heath, Calyx 3: 153. (1993)
× Leminia P.V.Heath, Calyx 4: 146. (1994)
× Bleckara P.V.Heath, Calyx 4: 146. (1994)

Notes

Also spelt Aloë.
Distribution
Native distribution areas:

Africa
West Tropical Africa
Benin, Burkina, Ghana, Guinea-Bissau, Guinea, Ivory Coast, Mali, Nigeria, Senegal, Togo.
West-Central Tropical Africa
Burundi, Central African Republic, Cameroon, Congo, Gabon, Rwanda, Zaïre.
Northeast Tropical Africa
Chad, Djibouti, Eritrea, Ethiopia, Socotra, Somalia, Sudan.
East Tropical Africa
Kenya, Tanzania, Uganda.
South Tropical Africa
Angola, Malawi, Mozambique, Zambia, Zimbabwe.
Southern Africa
Botswana, Cape Provinces, Caprivi Strip, Lesotho, Namibia, KwaZulu-Natal, Free State, Swaziland, Northern Provinces.
Western Indian Ocean
Aldabra, Comoros, Mauritius, Madagascar, Réunion, Rodrigues.
Asia-Temperate
Arabian Peninsula
Oman, Saudi Arabia, Yemen.

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Linnaeus, C. 1753. Species Plantarum. Tomus I: 319. Reference page.

Additional references

Britton, N.L. & Millspaugh, C.F. 1920. Bahama Fl. 69. 26.
Manning, J.C. Boatwright, J.S., Daru, B.H., Maurin, O. & van der Bank, M. 2014. A molecular phylogeny and generic classification of Asphodelaceae subfamily Alooideae: a final resolution of the prickly issue of polyphyly in the alooids? Systematic Botany 39(1): 55–74. DOI: 10.1600/036364414X678044 ResearchGate Reference page.

Links

Govaerts, R. et al. 2017. Aloe in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2017 Sept. 12. Reference page.
International Plant Names Index. 2017. Aloe. Published online. Accessed: Sept. 12 2017.


Vernacular names
беларуская: Алоэ
čeština: Aloe
Deutsch: Aloe
suomi: Aaloet
hts: Tlhii
magyar: Aloé
latviešu: Alvejas
Nederlands: Aloë
ikirundi: Aloes
русский: Алоэ
svenska: Aloesläktet
Türkçe: Sarısabır
中文: 蘆薈属

Aloe (/ælˈoʊ.i, ˈæloʊ(i)/; also written Aloë) is a genus containing over 560 species of flowering succulent plants.[3] The most widely known species is Aloe vera, or "true aloe". It is called this because it is cultivated as the standard source for assorted pharmaceutical purposes.[4] Other species, such as Aloe ferox, are also cultivated or harvested from the wild for similar applications.[5]

The APG IV system (2016) places the genus in the family Asphodelaceae, subfamily Asphodeloideae. Within the subfamily it may be placed in the tribe Aloeae.[6] In the past, it has been assigned to the family Aloaceae (now included in the Asphodeloidae) or to a broadly circumscribed family Liliaceae (the lily family). The plant Agave americana, which is sometimes called "American aloe", belongs to the Asparagaceae, a different family.

The genus is native to tropical and southern Africa, Madagascar, Jordan, the Arabian Peninsula, and various islands in the Indian Ocean (Mauritius, Réunion, Comoros, etc.). A few species have also become naturalized in other regions (Mediterranean, India, Australia, North and South America, Hawaiian Islands, etc.).[1]
C

Description

Most Aloe species have a rosette of large, thick, fleshy leaves. Aloe flowers are tubular, frequently yellow, orange, pink, or red, and are borne, densely clustered and pendant, at the apex of simple or branched, leafless stems. Many species of Aloe appear to be stemless, with the rosette growing directly at ground level; other varieties may have a branched or unbranched stem from which the fleshy leaves spring. They vary in color from grey to bright-green and are sometimes striped or mottled. Some aloes native to South Africa are tree-like (arborescent).[7]
Systematics

The APG IV system (2016) places the genus in the family Asphodelaceae, subfamily Asphodeloideae.[6] In the past it has also been assigned to the families Liliaceae and Aloeaceae, as well as the family Asphodelaceae sensu stricto, before this was merged into the Asphodelaceae sensu lato.

The circumscription of the genus has varied widely. Many genera, such as Lomatophyllum,[8] have been brought into synonymy. Species at one time placed in Aloe, such as Agave americana, have been moved to other genera.[9] Molecular phylogenetic studies, particularly from 2010 onwards, suggested that as then circumscribed, Aloe was not monophyletic and should be divided into more tightly defined genera. In 2014, John Charles Manning and coworkers produced a phylogeny in which Aloe was divided into six genera: Aloidendron, Kumara, Aloiampelos, Aloe, Aristaloe and Gonialoe.[10]
Species
Main article: List of Aloe species

Over 500 species are accepted in the genus Aloe, plus even more synonyms and unresolved species, subspecies, varieties, and hybrids. Some of the accepted species are:[3]

Aloe aculeata Pole-Evans
Aloe africana Mill.
Aloe albida (Stapf) Reynolds
Aloe albiflora Guillaumin
Aloe arborescens Mill.
Aloe arenicola Reynolds
Aloe argenticauda Merxm. & Giess
Aloe bakeri Scott-Elliot
Aloe ballii Reynolds
Aloe ballyi Reynolds
Aloe brevifolia Mill.
Aloe broomii Schönland
Aloe buettneri A.Berger
Aloe camperi Schweinf.
Aloe capitata Baker
Aloe comosa Marloth & A.Berger
Aloe cooperi Baker
Aloe corallina Verd.
Aloe dewinteri Giess ex Borman & Hardy
Aloe erinacea D.S.Hardy
Aloe excelsa A.Berger
Aloe ferox Mill.
Aloe forbesii Balf.f.
Aloe helenae Danguy
Aloe hereroensis Engl.
Aloe inermis Forssk.
Aloe inyangensis Christian
Aloe jawiyon S.J.Christie, D.P.Hannon & Oakman ex A.G.Mill.
Aloe jucunda Reynolds
Aloe khamiesensis Pillans
Aloe kilifiensis Christian
Aloe maculata All.
Aloe marlothii A.Berger
Aloe mubendiensis Christian
Aloe namibensis Giess
Aloe nyeriensis Christian & I.Verd.
Aloe pearsonii Schönland
Aloe peglerae Schönland
Aloe perfoliata L.
Aloe perryi Baker
Aloe petricola Pole-Evans
Aloe polyphylla Pillans
Aloe rauhii Reynolds
Aloe reynoldsii Letty
Aloe scobinifolia Reynolds & Bally
Aloe sinkatana Reynolds
Aloe squarrosa Baker ex Balf.f.
Aloe striata Haw.
Aloe succotrina Lam.
Aloe suzannae Decary
Aloe thraskii Baker
Aloe vera (L.) Burm.f.
Aloe viridiflora Reynolds
Aloe wildii (Reynolds) Reynolds

In addition to the species and hybrids between species within the genus, several hybrids with other genera have been created in cultivation, such as between Aloe and Gasteria (× Gasteraloe), and between Aloe and Astroloba (×Aloloba).
Multiple Aloe species with a variety of growth forms. UCLA Botanical Garden
Uses

Aloe species are frequently cultivated as ornamental plants both in gardens and in pots. Many aloe species are highly decorative and are valued by collectors of succulents. Aloe vera is used both internally and externally on humans as folk or alternative medicine.[11] The Aloe species is known for its medicinal and cosmetic properties.[12] Around 75% of Aloe species are used locally for medicinal uses.[12] The plants can also be made into types of special soaps or used in other skin care products (see natural skin care).[13]

Numerous cultivars with mixed or uncertain parentage are grown. Of these, Aloe ‘Lizard Lips’ has gained the Royal Horticultural Society’s Award of Garden Merit.[14]

Aloe variegata has been planted on graves in the superstitious belief that this ensures eternal life.[15]
Historical uses
Depiction of Aloe, labeled in Greek "ΑΛΟΗ" (Aloë) from the Juliana Anicia Codex, a copy, written in Constantinople in 515 AD, of Dioscorides' 1st century AD work.[16]

Historical use of various aloe species is well documented. Documentation of the clinical effectiveness is available, although relatively limited.[4][17]

Of the 500+ species, only a few were used traditionally as herbal medicines, Aloe vera again being the most commonly used species. Also included are A. perryi and A. ferox. The Ancient Greeks and Romans used Aloe vera to treat wounds. In the Middle Ages, the yellowish liquid found inside the leaves was favored as a purgative.[16] Unprocessed aloe that contains aloin is generally used as a laxative, whereas processed juice does not usually contain significant aloin.[18]

Some species, particularly Aloe vera, are used in alternative medicine and first aid. Both the translucent inner pulp and the resinous yellow aloin from wounding the aloe plant are used externally for skin discomforts. As an herbal medicine, Aloe vera juice is commonly used internally for digestive discomfort.[19][20]

According to Cancer Research UK, a potentially deadly product called T-UP is made of concentrated aloe, and promoted as a cancer cure. They say "there is currently no evidence that aloe products can help to prevent or treat cancer in humans".[21]
Aloin in OTC laxative products

On May 9, 2002, the US Food and Drug Administration issued a final rule banning the use of aloin, the yellow sap of the aloe plant, for use as a laxative ingredient in over-the-counter drug products.[22] Most aloe juices today do not contain significant aloin.
Chemical properties

According to W. A. Shenstone, two classes of aloins are recognized: (1) nataloins, which yield picric and oxalic acids with nitric acid, and do not give a red coloration with nitric acid; and (2) barbaloins, which yield aloetic acid (C7H2N3O5), chrysammic acid (C7H2N2O6), picric and oxalic acids with nitric acid, being reddened by the acid. This second group may be divided into a-barbaloins, obtained from Barbados Aloe, and reddened in the cold, and b-barbaloins, obtained from Aloe Socotrina and Zanzibar Aloe, reddened by ordinary nitric acid only when warmed or by fuming acid in the cold. Nataloin (2C17H13O7·H2O) forms bright-yellow scales, barbaloin (C17H18O7) prismatic crystals. Aloe species are used in essential oils as a safety measure to dilute the solution before they are applied to the skin.[23]
Flavoring

Aloe perryi, A. barbadensis, A. ferox, and hybrids of this species with A. africana and A. spicata are listed as natural flavoring substances in the US government Electronic Code of Federal Regulations.[24] Aloe socotrina is said to be used in yellow Chartreuse.[25]
Heraldic occurrence

Aloe rubrolutea occurs as a charge in heraldry, for example in the Civic Heraldry of Namibia.[26]


See also

List of Aloe species
List of ineffective cancer treatments
List of Southern African indigenous trees

References

"Aloe". World Checklist of Selected Plant Families. Royal Botanic Gardens, Kew. Retrieved 2013-02-25.
1897 illustration from Franz Eugen Köhler, Köhler's Medizinal-Pflanzen
The Plant List (2010). Version 1. Published on the Internet; http://www.theplantlist.org/ (accessed July 2013)
"Aloe Vera: Science and Safety". NIH National Center for Complementary and Integrative Health. April 2012. Retrieved 31 March 2013.
Salehi, Bahare; Albayrak, Sevil; Antolak, Hubert; Kręgiel, Dorota; Pawlikowska, Ewelina; Sharifi-Rad, Mehdi; Uprety, Yadav; Tsouh Fokou, Patrick Valere; Yousef, Zubaida; Amiruddin Zakaria, Zainul; Varoni, Elena Maria (2018-09-19). "Aloe Genus Plants: From Farm to Food Applications and Phytopharmacotherapy". International Journal of Molecular Sciences. 19 (9): 2843. doi:10.3390/ijms19092843. ISSN 1422-0067. PMC 6163315. PMID 30235891.
Stevens, P.F. (2001 onwards). "Asphodelaceae". Angiosperm Phylogeny Website. Retrieved 2016-06-09.
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Further reading
Carter, Susan (2011). Aloes : the definitive guide. British Cactus and Succulent Society. Richmond, Surrey, UK: Kew Pub. ISBN 9781842464397. OCLC 670480354.
Ben-Erik, Van Wyk; Smith, Gideon (2014). Guide to the aloes of South Africa (Third ed.). Pretoria, South Africa. ISBN 9781920217389. OCLC 897036340.

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