Two New Species and a New State Record of Crassulaceae from Michoacán, Mexico

The state of Michoacán, Mexico is moderately diverse in Crassulaceae, with 38 species documented to occur there. In this article, two new species of Crassulaceae endemic to the Sierra Madre del Sur of Michoacán are described and illustrated with photos; a new state record is also reported. Echeveria coalcomanensis is known from a single rock outcrop in humid pine-oak forest at 2000 m in the Sierra de Coalcomán. It is placed in series Valvatae based on the inflorescence of cincinni, imbricate bracts, and valvate petals. The species can be easily distinguished from other members of the series by having green, ovate to deltoid leaf blades with a reddish acuminate apex. Sedum larai occurs at two localities separated by 90 km. One is found at the ecotone of oak forest and tropical deciduous forest at 1200 m, the other in pine-oak forest at 2138 m. The new species is similar to two species of Sedum sect. Fruticisedum, S. bourgaei and S. guadalajaranum, from which it differs by being a dwarf, rhizomatous herb with delicate, unbranched stems to 11 cm long. Sedum salazarii was previously known only from western Guerrero and is here reported 200 km to the west in the Michoacán, where it occurs in pine-oak forest and cloud forest at 2300 to 2500 m.