44. Rhynchosida Fryxell, Brittonia. 30: 458, fig. 4. 1978.
[Greek rhynchos, beak, and generic name Sida, alluding to beaked mericarps] [Greek rhynchos, beak, and generic name Sida, alluding to beaked mericarps]
Paul A. Fryxell
Steven R. Hill
Herbs [shrubs], perennial. Stems trailing to ascending, stellate-hairy, not viscid. Leaves: stipules persistent, linear; blade oblong-ovate to oblong-lanceolate [orbiculate], unlobed, base shallowly cordate, margins crenate or serrate. Inflorescences axillary solitary flowers; involucel absent. Flowers: calyx accrescent, green-membranous and inflated in fruit, enclosing it, lobes overlapping, unribbed, cordate, stellate-pubescent; corollas yellow, [with] without dark spot at base; staminal column included; style 8–10[–14]-branched; stigmas capitate. Fruits schizocarps, pendulous, somewhat inflated, oblate, indurate, glabrous; mericarps 8–10[–14], 1-celled, each with long, horizontal, obtuse rostrum, lateral walls reticulate, indehiscent. Seeds 1 per mericarp, puberulent. x = 8.
Species 2 (1 in the flora): sc, sw North America, Mexico, South America (Argentina, Bolivia, Brazil, Uruguay).
Rhynchosida kearneyi Fryxell is endemic to Bolivia.