19. Billieturnera Fryxell, Sida. 9: 195. 1982.
[For Billie Lee Turner, b. 1925, American botanist] [For Billie Lee Turner, b. 1925, American botanist]
Paul A. Fryxell
Steven R. Hill
Sida Linnaeus sect. Icanifolia Clement, Contr. Gray Herb. 180: 60. 1957
Subshrubs. Stems ascending or procumbent, softly hairy, not viscid. Leaves: stipules persistent, broadly oblanceolate; blade broadly oblanceolate, unlobed, not dissected or parted, base cuneate, margins dentate to subentire. Inflorescences axillary, solitary flowers; involucel absent. Flowers: calyx not accrescent, not inflated, not completely enclosing fruits, deeply divided, lobes unribbed, narrowly triangular; corolla pale yellow; staminal column included; style 5-branched; stigmas capitate. Fruits schizocarps, erect, not inflated, variable in shape, papery, stellate-hairy, apically dehiscent; mericarps 5, 1-celled, with abaxial keel and apical spine 1–1.5 mm. Seeds 1 per mericarp, minutely and obscurely pubescent. x = 8.
Species 1: Texas, ne Mexico.
Although originally included in Sida (because the mericarps are one-seeded), Billieturnera is more closely related to Abutilon than it is to Sida.