Exacum

Exacum
Exacum bicolor from India
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Gentianales
Family:	Gentianaceae
Tribe:	Exaceae
Genus:	Exacum L. (1753)
Species[1]
75; see text
Distribution of the genus Exacum.
Synonyms[1]
Chondropis Raf. (1837) Cotylanthera Blume (1826) Eophylon A.Gray (1869) Floyera Neck. (1790), opus utique oppr. Paracelsea Zoll. & Moritzi (1845)

Exacum (/ˈɛksəkəm/ EK-sə-kəm)^[2][3] is a genus of plant in family Gentianaceae. It contains 75 species native to tropical regions of sub-Saharan Africa, southern Arabian Peninsula, south and southeast Asia, New Guinea, and Australia.^[1]

Species

75 species are accepted.^[1]

• Exacum affine Balf.f. ex Regel
• Exacum alberti-grimaldii Wohlh. & Callm.
• Exacum amplexicaule Klack.
• Exacum anamallayanum Bedd.
• Exacum anisopterum Klack.
• Exacum appendiculatum Klack.
• Exacum arabicum Thulin
• Exacum atropurpureum Bedd.
• Exacum axillare Thwaites
• Exacum bulbilliferum Baker
• Exacum caeruleum Balf.f.
• Exacum conglomeratum Klack.
• Exacum courtallense Arn.
• Exacum darae Hul
• Exacum decapterum Klack.
• Exacum dipterum Klack.
• Exacum divaricatum (Baker) Schinz
• Exacum dolichantherum Klack.
• Exacum emirnense (Baker) Schinz
• Exacum exiguum Klack.
• Exacum fruticosum Humbert
• Exacum giganteum Klack.
• Exacum gracile Klack.
• Exacum hamiltonii G.Don
• Exacum hoffmannii Vatke ex Schinz
• Exacum humbertii Klack.
• Exacum idukkianum Geethakum., Pandur., Ravich. & Deepu
• Exacum intermedium Klack.
• Exacum keralense Geethakum., K.M.P.Kumar, Pandur. & Deepu
• Exacum klackenbergii Gopalan
• Exacum lawii C.B.Clarke
• Exacum laxiflorum (Gamble) Geethakum., Deepu, Kissling & Pandur.^[4]
• Exacum linearifolium (Humbert) Klack.
• Exacum loheri (H.Hara) Klack.
• Exacum lokohense Humbert
• Exacum macranthum Arn. ex Griseb.
• Exacum marojejyense Humbert
• Exacum nanum Klack.
• Exacum naviculare Klack.
• Exacum nossibeense Klack.
• Exacum nummulariifolium Humbert
• Exacum oldenlandioides (S.Moore) Klack.
• Exacum pallidum (Trimen) Klack.
• Exacum paucisquamum (C.B.Clarke) Klack.
• Exacum pedunculatum L.
• Exacum penninerve Klack.
• Exacum petiolare Griseb.
• Exacum pteranthum Wall. ex G.Don
• Exacum pumilum Griseb.
• Exacum quinquenervium Griseb.
• Exacum radicans Humbert
• Exacum rotundifolium Klack.
• Exacum sessile L.
• Exacum socotranum Vierh.
• Exacum spathulatum Baker
• Exacum speciosum Klack.
• Exacum stenophyllum Klack.
• Exacum stenopterum Klack.
• Exacum subacaule Humbert
• Exacum subteres Klack.
• Exacum subverticillatum Humbert
• Exacum sutaepense Hosseus ex Craib
• Exacum tenue (Blume) Klack.
• Exacum teres Wall.
• Exacum tetragonum Roxb.
• Exacum travancoricum Bedd.
• Exacum trinervium (L.) Druce
• Exacum umbellatum Klack.
• Exacum undulatum Klack.
• Exacum walkeri Arn. ex Griseb.

References

1. Exacum L. Plants of the World Online. Retrieved 22 July 2024.
2. Klackenberg, Jens (1985). "The genus Exacum (Gentianaceae)". Opera Bot. 84: 1–144.
3. Klackenberg, jens (2006). "Cotylanthera transferred to Exacum (Gentianaceae)". Botanische Jahrbücher. 126 (4): 477–481. doi:10.1127/0006-8152/2006/0126-0477.
4. Geethakumary, M.P.; Deepu, Sivadas; Kissling, Jonathan; Pandurangan, A.G. (2022). "Revisiting the taxonomy of Exacum courtallense (Gentianaceae) and recognizing E. courtallense var. laxiflorum at the species rank". Phytotaxa. 559 (2): 185–192. doi:10.11646/phytotaxa.559.2.7.