Monographs Details: Sciadotenia campestris Barneby
Authority: Barneby, Rupert C. 1992. A Sciadotenia (Menispermaceae) from the Brazilian Planalto. 44: 264-265.
Description:Species Description - Foliorum lamina ovata parva (6.5 x 4.5 cm usque) cum S. pubistaminea (K. Schumann) Diels comparabilis, sed caulibus rigide fruticosis (nec volubilibus), foliorum petiolo abbreviato 8-18 (nec debili 20-35) mm longo, foliis ramulorum fertilium in rudimenta bracteiformia reductis, necnon androecio glaberrimo diversa.
Shrubs +/- 1 m with stiff virgate branches, the young stems densely strigulose with appressed-incurved, sordid hairs less than 0.2 mm but the stiffly chartaceous lustrous leafblades glabrous, the simple or few-branched, spiciform staminate inflorescences axillary and terminal, each spike borne on a short, efoliate but bracteate branchlet. Petioles (8)10-18 mm, shallow-sulcate ventrally, a trifle swollen but not pulvinate at base, unmodified at apex; blades ovate from broadly flabellate base, depressed-deltate-apiculate at tip, the larger ones 4-6.5 x 2-4.5 cm, all 5-plinerved, the outer primary nerves submarginal, the inner pair incurved-ascending through 2/3 - 3/4 the blade's length, the stout midrib giving rise on each side, beyond mid - blade, to 1(2) major incurved secondary nerves and pinnately branched its whole length, the tertiary and reticular venules all sharply prominulous on each face. Flowering branchlets of staminate plant together with the spike-axis 2-3.5 cm; bracts preceding the flowers linear thick-textured +/- 3 mm, those subtending individual flowers subulate 1-1.5 mm; perianth 15-merous, silky-strigulose externally with partly rusty hairs, the outermost sepals +/- 0.7 mm, the narrowly ovate ones of the third cycle +/-2 mm, the 6 petaloid innermost ones a trifle shorter, glabrescent marginally; androecium 6-merous, the stamens all free to base but dimorphic, the filaments of the outer cycle 1.9 mm, abruptly dilated at apex, the terminal transverse anthers looking upward, the filaments of the inner cycle +/- half as long, their anthers rudimentary. Pistillate plant unknown.
TYPES. BRAZIL. Bahia. Mun. Barreiras: rod. BR-020, 30-40 km W of Roda Velha, 20 Jul 1986 (fl. d), G. Hatschbach (with J. M. Silva) 50530 (HOLOTYPE: MBM 113175; ISOTYPE: US 3236801).
Habitat and dispersal: in campo cerrado (whence the epithet) near 600 m, known only from the type-locality on the E slope of Espigao Mestre, near 13ºS, 46ºW, close to the Goi'as state line in far western Bahia, Brazil. Flowering Aug-Sep.