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Subfamily

VI. Subfam. Lamioideae Harley (2003)

Subfam. Stachyoideae (Dumort.) Luerss. (1882); Briq. in Engl. & Prantl (1895) et auct. mult., p.p., typ. incl.

Subfam. Prasioideae (Benth.) Thomé (1889)

Subfam. Pogostemonoideae P.D. Cantino, Harley & Wagstaff in Harley & Reynolds (1992).

Description

Annual herbs with simple hairs; upper leaves amplexicaul, lowest usually petiolate; inflorescence racemoid, ebracteolate; flowers short-pedicellate; calyx 2-lipped, 5-lobed (3/2), ± gaping at anthesis, becoming closed by anterior lip in fruit, posterior lip shallowly 3-lobed, lobes usually apiculate, anterior lip shallowly 2-lobed, each lobe with 2- 6 teeth; corolla 2-lipped, 5-lobed (2/3), pale lavender to reddish purple, posterior lip shallowly hooded, 2-lobed, often erose, lobes of anterior lip often erose, tube annulate near base, with a 2-lobed hump on lower side partially blocking throat; stamens 4, filaments villous, apically inward-geniculate, anthers bearded on ventral surface, thecae asymmetrically divergent, not confluent, inner theca of each anther larger than outer one, its suture bordered by a single tooth; disc with abaxial lobe shorter than to equalling ovary; stigma-lobes equal; nutlets trigonous, puberulent, smooth. 2n = 28.  Two spp., sandy soils, United States (Texas).

Distribution

Native to:

77 South-Central U.S.A.
79 Mexico

Publication

Brazoria Engelm. ex A. Gray, Boston J. Nat. Hist. 5: 255 (1845); Turner, Pl. Syst. Evol. 203: 69 (1996).

Image resource

© Royal Botanic Gardens, Kew

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