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Photos: Leeratiwong, C.

Photos: Suddee, S.;Leeratiwong, C.

Photos: Suddee, S.; Leeratiwong, C.

Subfamily

VII. Subfam. Nepetoideae (Dumort.) Luerss. (1882).

VII. 3. Tribe Ocimeae Dumort. (1829).

VII. 3. D. Subtribe Ociminae (Dumort.) Schmidt in Martius (1858).

Subtribe Moschominae Endlicher (1838).

Description

Herbs, sometimes geoxylic, not or faintly aromatic; leaves simple; inflorescence thyrsoid, lax or more rarely condensed with cymes sessile, usually >3-flowered, more rarely 3-flowered; bracts persistent, often basally coloured; calyx tubular, campanulate or urceolate, curving upwards or straight, 2-lipped, 2- to 8-lobed (1-3/1-5), lobes unequal, posterior lip entire with rounded or acute apex or 3-lobed, with posterior lobe decurrent or not, anterior lip entire and rounded, emarginate, 2-toothed or 5-toothed, if entire then closing calyx throat in fruit; corolla 2-lipped, 5- or 4-lobed (3-4/1), white, pink or blue, posterior lip ascending, 3-4-lobed, anterior lip horizontal, entire, slightly concave, corolla-tube straight, dorsally gibbous at midpoint or spurred near base, dilating towards throat; stamens 4, declinate or spreading, exserted, posterior pair attached around midpoint of corolla, basally pubescent and swollen, sometimes appendiculate, anterior pair attached at corolla throat or near midpoint; stigma-lobes equal, linear; disc 4-lobed with anterior lobe larger; nutlets ovoid, minutely striate, usually weakly mucilaginous when wet.  2n = 14, 18, 28, 30, 42, 48.  Forty-five species in Tropical Africa and Asia, also in Australia (Queensland), grassland, open woodland often in wet areas.

Distribution

Native to:

22 West Tropical Africa
23 West-Central Tropical Africa
24 Northeast Tropical Africa
25 East Tropical Africa
26 South Tropical Africa
27 Southern Africa
29 Western Indian Ocean
36 China
38 Eastern Asia
40 Indian Subcontinent
41 Indo-China
42 Malesia
43 Papuasia
50 Australia

Synonyms

Mesona Blume, Bijdr.: 838 (1826).

Acrocephalus Benth., Edwards's Bot. Reg. 15: t. 1282, 13 (1829)., pro parte quoad African and Madagascan species (1830).   

Geniosporum Wall. ex Benth., Edwards's Bot. Reg. 15: t. 1300 (1830).

Nosema Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 73: 20 (1904).

Limniboza R.E.Fr., Wiss. Erg. Schwed. Rhod.-Kongo Exped. 1: 277 (1916).

Hemsleia Kudô, Mem. Fac. Sci. Taihoku Imp. Univ. 2: 142 (1929).

Ceratanthus F.Muell. ex G.Taylor, J. Bot. 74: 3 (1936).

Octomeron Robyns, Bull. Jard. Bot. État 17: 28 (1943).

Publication

Platostoma P. Beauv., Fl. Oware 2: 61, t. 95 (1818); Paton, Kew Bull. 52: 257-292 (1997), rev.

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Image resource

© Royal Botanic Gardens, Kew