Monographs Details: Pavonia piptocalyx Krapov.
Authority: Fryxell, Paul A. 1999. Cavanilles (Malvaceae). Fl. Neotrop. Monogr. 76: 1-284. (Published by NYBG Press)
Description:Species Description - Shrubs (scandent?) 1.5-3 m tall, the stems with appressed stellate hairs 0.3 mm diam. Leaf blades narrowly elliptic, 5.5-12 x 1-4.5 cm (2.5-8 times as long as wide), cuneate, serrate, acuminate, penninerved, with minute appressed stellate hairs (or glabrate on upper surface); petioles 4-30 mm long; stipules linear-lanceolate, 6-8 mm long. Flowers solitary in the leaf axils but sometimes congested apically among the leaves, the pedicels 6-12 mm long; involucellar bracts 5, ligulate, 8-10 x 2-4 mm, sparsely and minutely pubescent; calyx 4-5 mm long, deciduous with the corolla after anthesis; petals ca. 10 x 3 mm, white; staminal column somewhat shorter than corolla, the anthers subessile. Fruits 8-10 mm diam., glabrous, basally constricted, the mericarp body 6-8 mm high, with strong lateral ribs, 3-spined, the spines divergent, 6-10 mm long, retrorsely barbed, the lateral spines 3-4 mm apart at base.

Discussion:Illustrations. Krapovickas (1982b: fig. 1G-H, pl. 4).

Pavonia piptocalyx is unique in the genus for its circumscissally dehiscent and deciduous calyx. It also has narrow, ligulate, white petals, like P. stenopetala, but its pedicels are much shorter than those of the latter species.
Distribution:Brazil South America| ParĂ¡ Brazil South America|