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Subfamily

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

VII. 2. Tribe Mentheae Dumort. (1827).

VII. 2. B. Subtribe Menthinae (Dumort.) Endl. (1838).

Description

Annual herbs; leaves subsessile, entire with margins long-ciliate; inflorescence of verticillasters, cymes 1-4-flowered, in axils of bracts, forming terminal spiciform, congested or interrupted thyrse; bracts leaf-like; bracteoles long-ciliate, curved, purple-tinged; calyx often purple-tinged, 2-lipped, 5-lobed (3/2), lobes elongate, long-ciliate, anterior narrower with deeper sinus, tube 15-nerved, conspicuously ribbed, cylindrical, weakly gibbous, slightly curved, annulate at throat; corolla lilac to purple, 2-lipped, 5-lobed (2/3), posterior lip flat, anterior longer and broader, tube narrowly cylindrical, slightly gibbous towards base, annulate above gynoecium; stamens 2, posterior pair absent, anterior slightly exserted, filaments prolonged into small tooth above articulation with anther, thecae divaricate at 180, extending parallel to corolla-tube axis, distinct but anthers connate at point of attachment, connective apparent; style hairy; stigma-lobes subequal, flattened, triangular; disc symmetrical; nutlets ellipsoid-obovate, smooth, pale brown, glabrous, weakly mucilaginous.  2n = 26.  One species, R. ciliatus (Benth.) Epling, or possibly two, confined to Texas, U.S.A. Open, sandy areas.

Distribution

Native to:

77 South-Central U.S.A.

Publication

Rhododon Epling, Rep. Spec. Nov. Regn. Veg. Beih. 115: 14 (1939).

Image resource

Royal Botanic Gardens, Kew

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