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| A – B Gomphostemma mastersii: A tuber-like roots; B corolla with inflated throat. C G. parviflorum: axillary inflorescence and corolla with narrow throat. D G. javanicum: fleshy nutlets. E – F G. leptodon: E axillary inflorescence; F flower, note calyx lobes longer than the tube and corolla with inflated throat. iin Bongcheewin, Ingrouille & Paton, 2022. Photos: T. Phutthai (A – B & D); B. Bongcheewin (C); M. Nuraliev (E – F). |
Summary
The genus Gomphostemma Wall. ex Benth. is revised. Thirty-one species are recognised with three new species described: G. flexuosum Bongch. from north-eastern Thailand, southern Laos and central Vietnam, G. longipetalum Bongch. and G. repentum Bongch. from northern Myanmar. Thirty names are lectotypified. A key to species, distribution maps and conservation categories for all species are provided.
Key Words: Conservation, Lamioideae, taxonomy.
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| A – B Gomphostemma mastersii: A tuber-like roots; B corolla with inflated throat. C G. parviflorum: axillary inflorescence and corolla with narrow throat. D G. javanicum: fleshy nutlets. E – F G. leptodon: E axillary inflorescence; F flower, note calyx lobes longer than the tube and corolla with inflated throat. Photos: A – B & D Thammarat Phutthai; C Bhanubong Bongcheewin; E – F Maxim Nuraliev. |
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Gomphostemma longipetalum Bongch. sp. nov.
Type: Burma, Kachin, Mountains East of Fort Hertz, ..., 600 – 900 m,
3 Sept. 1926, Ward 7359
(holotype K [K001081925]).
NOTES. The epithet longipetalum [longi- (in Greek compound), long; -petalum, petal] refers to its corolla length.
Gomphostemma flexuosum Bongch. sp. nov.
Type: Thailand, Chaiyaphum, Phu Khiew Wildlife Sanctuary, ..., 800 m,
11 Oct. 1998, Suddee et al. 955
(holotype K [K001081924]; isotypes BKF, TCD).
NOTES. The epithet flexuosum [flexuosum, zigzag] refers to its wavy stem.
Gomphostemma repentum Bongch. sp. nov.
Type: Upper Burma, Karenni, Ywathit, Salween Valley, 600 m,
11 Jan. 1913, Micholitz s.n.
(holotype K [K001081923]).
ETYMOLOGY. The epithet repentum [repens, creeping] refers to its habit.
Bhanubong Bongcheewin, Martin J. Ingrouille and Alan J. Paton. 2022. A Revision of Gomphostemma (Lamiaceae). Kew Bulletin. DOI: 10.1007/s12225-021-09991-y
