A NEW SPECIES OF HIDALGOA (ASTERACEAE, COREOPSIDEAE ) FROM SOUTHERN MEXICO B. L. Turner Dept. of Botany, Univ. of Texas, Austin, TX 78713 U.S.A. Attempts to identify collections from southern Veracruz along Rio Uxpanapa by Dr. Tom Wendt and assistants has revealed the following novelty. HIDALGOA USPANAPA B. Turner, sp. nov. Fig. 1. H. breedlovei Sherff similis sed flosculis radiatis 6-8, 23-40 mm longis luteis ubi exsiccatis et flosculis disci majoribus 14-15 longis lobis ca 2 mm longis differt. Clambering glabrous vine in trees, the stems anchored by twisting petioles. Leaves opposite throughout, 6-10 cm long, 6-9 cm wide, 3-foliate; leaflets ovate, the terminal ones petiolate, 4.5-6.5 cm long, 2-3 cm wide, glabrous throughout, the surfaces finely pustulate-punctate on both surfaces, the margins irregularly serrulate. Heads single, 5-8 cm wide across the rays, axillary on peduncles 10-20 cm long. Involucres 4-seriate, the bracts 4 or 5 in each of 4 alternating series, totaling 18-20 in all, the individual bracts 1 inear-obla nceo la te to linear-lanceolate, 13-25 mm long, 1-4 mm wide, glabrous and with strong medial nerves, the outer series somewhat spreading (but not reflexed), the inner series erect. Receptacular bracts scarious, shorter than the florets. Ray florets 6-8, pistillate, fertile, the ligules described as " anaran jadas " but drying bright yellow, 2.5-4.0 cm long, 0.8-1.0 cm wide. Disk florets 40-60, sterile, the corollas yellow, ca 15 mm long, the lobes smooth, ca 3 mm long. Anther appendages ca 0.5 mm long, the exterior surfaces covered with numerous rounded sessile brown glands. Style branches, the pubescent portion, ca 4 mm long, most of these lobed or bifid at the apex for 0.5-1.0 mm. Achenes (immature) glabrous, the apical cusps ca 3 mm long. TYPE: MEXICO. VERACRUZ: Mopio . de Minatitlan, Rio Uxpanapa, desde el polado de Uxpanapa arriba, hasta los limites con Oaxaca. Vegetacion riparia de Ficus , Inga , Lindenia , etc. (17° 12'N, 94O10' W), 130 m, 14 Jul 1980, Tom Wendt et al. 2568 (holotype, TEX; isotype MEXU) . 379
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