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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

Low shrubs, subshrubs, and annual herbs, strongly aromatic; leaves opposite, sessile or subsessile, linear to narrowly oblanceolate, oblong or lanceolate, usually entire; inflorescence of axillary cymes, merging to form a terminal thyrse (or rarely the cymes reduced to solitary flowers); calyx 2-lipped, not accrescent, tubular-campanulate, 13-nerved, posterior lip broadly rounded, truncate or minutely 2-3-toothed, anterior lip triangular, 2-toothed, both lips somewhat upcurved, throat hairy; corolla white to reddish purple, 2-lipped, of two distinct types: (a) tube infundibular, anteriorly geniculate, with 2-lobed palate in throat, posterior lip emarginate, nearly flat; or (b) tube subcylindrical, straight to gently downcurved, without palate, posterior lip entire, galeate; stamens 4, didynamous, declinate and exserted in type 'a' corolla, or parallel and included under posterior lip in type 'b' corolla, filaments glabrous, thecae broadly ovoid with apical appendage, divergent, separate at dehiscence, suture short (almost porose), connective deltoid; style hirtellous, stigma-lobes equal or unequal; disc symmetrical; nutlets ovoid, smooth, glabrous.  2n = 32, 48.  Eight to nine species of oak and pine-oak woodlands in the SE United States.  Two sections are recognized: Stamens exserted, declinate; upper lip of corolla flat: sect. Dicerandra.  Stamens included under galeate upper lip: sect. Lecontea Huck.

Distribution

Native to:

78 Southeastern U.S.A.

Synonyms

Ceranthera Elliott, Sketch Bot. S. Carolina 2: 93 (1821), nom. illeg., non P. Beauv. (1808).

Publication

Dicerandra Benth., Edward's Bot. Reg. 15: sub t. 1300 (1830); Huck, Phanerog. Monogr. 19: 1-343 (1987), rev.

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Image resource

Royal Botanic Gardens, Kew