Reassessment of Zephyranthes (Amaryllidaceae) in the Yucatan Peninsula including a new species, Z-orellanae

摘要

G. CARNEVALI, R. DUNO, J. L. TAPIA, AND I. M. RAMIREZ (Herbarium CICY, Centro de Investigacion Cientifica de Yucatan, A.C., Calle 43 # 130, Colonia Chuburna de Hidalgo, Merida 97200, Yucatan, Mexico). Reassessment of Zephyranthes (Amaryllidaceae) in the Yucatan Peninsula including a new species, Z. orellanae. J. Torrey Bot. Soc. 137: 39-48. 2010-A revision of Zephyranthes Herbert (Amaryllidaceae) in the Mexican portion of the Yucatan Peninsula Biotic Province is presented. Three species are native in the area, including the newly proposed, Zephyranthes orellanae Carnevali, Duno & J. L. Tapia, which is known from a narrow region of dry forests over rocky soils along the northwestern edge in the Yucatan state. Zephyranthes orellanae is related to Z. citrina Baker but is distinguishable by its narrower leaves. (0.9-1.2 mm wide vs. more that 3 mm in Z. citrina). Zephyranthes chlorosolen (Herb.) D. Dietrich is reported for the first time from the Yucatan Peninsula. The status of Zephyranthes citrina in the Yucatan Peninsula is assessed. The names Cooperia drummondii Herbert (= Zephyranthes brazosensis Traub) and Cooperia chlorosolen Herb. (= Zephyranthes chlorosolen) are lectotypified. Descriptions of all taxa and a key to their diagnosis are presented, as well as a map and iconography depicting all taxa involved. The conservation status of all three taxa is assessed against IUCN criteria.