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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

Perennial herbs; stems weak, internodes elongate, strongly 4-angled with ciliate angles; leaves small, ovate-deltate, entire or weakly toothed, ciliate, sessile; inflorescence of verticillasters, with 1-3-flowered sessile cymes in axils of bracts; bracts leaf-like; bracteoles inconspicuous, ciliate; calyx weakly 2-lipped, 5-lobed (3/2), lobes narrowly triangular, curved and slightly spreading, anterior lip often slightly shorter, tube cylindrical, 5-angled, 12-13-nerved, with 5 prominent, ciliate nerves, secondary nerves inconspicuous, tube glabrous within; corolla deep pink to lilac or white, 2-lipped, 5-lobed (2/3), posterior lip shorter than anterior, flat, bilobed to emarginate, median anterior lobe much longer than laterals, tube cylindrical below, widening above, longer than limb; stamens 2 (posterior pair absent), filaments glabrous, weakly curved and ascending under posterior corolla-lip; thecae widely separated and divaricate, connectives elongate; disc symmetrical, weakly 4-lobed; style glabrous; stigma-lobes unequal, posterior shorter; nutlets ovoid, brown, smooth, not mucilaginous when wetted.  About four species, S Brazil, Paraguay. Marshy ground.

Distribution

Native to:

84 Brazil
85 Southern South America

Publication

Hoehnea Epling, Rep. Spec. Nov. Beih. 115: 8 (1939); Epling, Rep. Spec. Nov. Beih. 85: 130-132 (1936), rev. as Keithia.

Image resource

Royal Botanic Gardens, Kew

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