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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

Biennial herbs, with simple hairs; leaves long-petiolate, broadly cordate-ovate; inflorescence racemoid, flowers sessile; calyx weakly zygomorphic, 4-lobed, posterior lobe absent, lateral lobes larger than anterior pair; corolla 2-lipped, 4-lobed (1/3), whitish, posterior lip shallowly hooded, entire, anterior lip with erose median lobe, tube exannulate; stamens 4, filaments conspicuously villous with long reddish hairs, apically inward-geniculate, thecae divaricate, not confluent, ovoid, prolonged to apical apicula, outer thecae of anterior stamens fused; disc with abaxial lobe equalling ovary; stigma-lobes unequal; nutlets obovoid-trigonal, smooth, glabrous.  2n = 18.  One sp.,   S. hispidula (Michx.) Baill., mesic woodlands, eastern United States (mostly in Appalachian region).

Distribution

Native to:

74 North-Central U.S.A.
75 Northeastern U.S.A.
78 Southeastern U.S.A.

Synonyms

Torreya Raf., Amer. Monthly Mag. & Crit. Rev. 1818: 356 (1818), nom. rej.

Publication

Synandra Nutt., Gen. N. Amer. Pl. 2: 29 (1818).

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Image resource

© Royal Botanic Gardens, Kew