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Sedum pyriseminum (Crassulaceae), a morphologically remarkable new annual species from the state of Durango, Mexico



Mexico is a proven centre of diversity and endemism for Sedum L. (Crassulaceae) and species new to science are continually being discovered. Sedum pyriseminum E. Pérez-Calix is described and illustrated based on specimens originating from the Mexiquillo region, Durango, Mexico. Sedum pyriseminum E. Pérez-Calix is a small annual plant, 2 cm or less in height. Although other Sedum species with this habit are known, S. pyriseminum does not closely resemble any of them. It is most similar to S. vinicolor S. Watson (= S. forreri E. L. Greene), with which it could be confused as a consequence of their similar size and sympatric distribution. The conservation status of Sedum pyriseminum is assessed as Vulnerable (VU).


Mexiquillo, Sedum forreri, Sedum vinicolor, vulnerable species, Eudicots, Mexico

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ISSN 1179-3155 (print); ISSN 1179-3163 (online)

Published by Magnolia Press, Auckland, New Zealand