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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

Perennial herbs, lianas or subshrubs, with simple hairs; leaves simple or sometimes irregularly pinnatisect; inflorescence thyrsoid or racemoid; calyx 5-lobed, becoming broader, often broadly campanulate in fruit, lobes equal or subequal (3/2) sometimes irregularly so, occasionally dentate-serrate; corolla 2-lipped, 4-lobed (1/3), white to purple, posterior lip moderately long, shorter than lower lip, shallowly hooded or almost flat, entire or emarginate, corolla-tube usually curved; stamens equal or posterior pair slightly longer, not or only shortly exserted, thecae weakly distinct; stigma-lobes short, ± clavate, subequal or anterior broader; nutlets spreading and exserted from calyx at maturity, obliquely attached at base, fleshy, with slightly winged margins, rounded at apex, glabrous.  2n = 64, 66.  About 34 spp., in mesic to moist forest, Hawaii, with one species (P. tahitensis Nadeaud ) in Tahiti and one ( P. tongaensis H. St. John) in Tonga I.

Distribution

Native to:

60 Southwestern Pacific
61 South-Central Pacific
63 North-Central Pacific

Publication

Phyllostegia Benth., Edward's Bot. Reg. 15: t. 1292 (1830); Wagner et al., Manual of the Flowering Plants of Hawaii 1: 810-826 (1990); Wagner, Novon 9: 265-297 (1999).

Image resource

© Royal Botanic Gardens, Kew

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