Monographs Details: Pavonia horrida Krapov.
Authority: Fryxell, Paul A. 1999. Cavanilles (Malvaceae). Fl. Neotrop. Monogr. 76: 1-284. (Published by NYBG Press)
Scientific Name:Pavonia horrida Krapov.
Description:Species Description - Shrubs ca. 1 m tall, the stems minutely arachnoid-pubescent. Leaf blades ovate to subelliptic, mostly 4-9 x 2.5-6 cm, truncate or subcordate, serrate, acute, palmately 5-nerved, minutely stellate-pubescent, sparsely so above; petioles 5-20 mm long; stipules subulate, 4-11 mm long. Flowers solitary in the leaf axils, the pedicels 7-14 mm long; involucellar bracts 5-6, linear-lanceolate, 7-9 x 1 mm or less, puberulent; calyx 8-12 mm long, hirsute with underlying puberulence; corolla (sometimes cleistogamous) 2-3 cm long, yellow, the genitalia ca. ½ the length of the corolla. Fruits 8-9 mm diam. excluding the spines, prominently hirsute, the mericarp body 6 mm long, prominently keeled and rugose, 3-spined, the spines stout, 5-6 mm long, obscurely and minutely barbed, the 5 apical spines erect and connivent, the lateral spines radiate and connivent in pairs, emerging between the calyx lobes.

Discussion:Illustration. Krapovickas (1982b: pl. 1, fig. IF).

Pavonia horrida is characterized by very stout spines on the mericarps that are only obscurely and minutely barbed, in common with P. flavispina and P.ionthacarpa. It is distinguished from P. flavispina by its erect habit and from P. ionthacarpa by the characters given in the key.
Distribution:Brazil South America| Santa Catarina Brazil South America|