NEW SPECIES OF MALVACEAE FROM MEXICO AND BRAZIL Paul A. Fryxell Research Geneticist, U.S. Department of Agriculture, Agricultural Research Service, Texas A&M University, College Station, TX 77843 The ongoing activities of plant collectors continue to bring to light previously unrecognized and undescribed species, especi-ally from tropical regions, and these discoveries continue to enlarge our understanding of the flora of these regions. Twelve new species in six genera of the Malvaceae are described below and are related to other members of their respective genera. 1. Abutilon pinkavae Fryxell, sp. nov. Abutilon caul ibus gracilibus erectis, saepe sine pilis stella-tis; laminis foliorum parvis (2-4 cm longis), concoloribus; corol-lis aurantiacis et stigmatibus marroninis; mericarpiis intus parce stellato-pubescentibus, apice spinescentibus (non tantummodo acuminatis), 2-spermis ut videtur. Erect or spreading, branched subshrub, 0.5 m tall. Stems green when young becoming straw-colored, terete, slender, covered with multicellular (glandular) hairs 0.1-0.5 mm long, occasionally intermixed with simple hairs 1-2 mm long and rarely with a few stellate hairs, glabrate in age. Leaf blades commonly 2 cm long, 1.5 cm wide (rarely to 4.0 cm long, 3.5 cm wide), ovate-lanceolate, deeply cordate, weakly crenate or serrate, acute or obtuse, with a callus-thickening at apex more or less developed on under side, stellate-pubescent above and below, concolorous or very slightly discolorous, palmately 5-7 nerved. Petioles from slightly shorter than to much longer than the lamina, with pubescence like that of stem but with stellate hairs common especially at apex, sometimes red-pi gmented except green at apex. Stipules linear, 3-4 mm long, 1 mm wide, pubescent, caducous, the scars often raised. Peduncles solitary in the axils, 1-4 cm long, usually exceeding the subtend-ing petiole, articulated 3-5 mm below the calyx, with pubescence like that of stem except the long simple hairs more abundant. Calyx 8-17 mm long, 20-veined at the base, invested with stellate hairs, long simple hairs, and some multicellular hairs, 5-lobed, ca. 2/3-divided; lobes cordate and somewhat plicate at the base, approximately equaling the fruit. Petals 14-18 mm long, 10-14 mm broad, orange, glabrous except on margin of claw where white-stellate-pubescent. Staminal column 3 mm long, glabrous, orange, 10-nerved, antheriferous at summit; filaments 1.0-1.5 mm long, orange; anthers and pollen yellow. Styles 7, glabrous, yellow, exceeding androecium; stigmas capitate, 0.4 mm diameter, maroon. Fruit a schizocarp of 7 mericarps, the septicidal dehiscence imper-fect, the loculicidal dehiscence complete to the base; mericarps 285
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