Six taxa of Echeveria (Crassulaceae) were found around the Sacred Valley in the Department of Cusco, Perú. (1) Echeveria cuscoensis, is a new, widespread species from the upper basin of the Sacred Valley (Vilcanota River) and is described from the ruins of P'isaq due to its abundance there. It has faceted rhomboid leaves, concave or canaliculate above, with obscurely incurved margins.(2) Echeveria decumbens is a small species with narrow green yellowish leaves and trailing horizontal inflorescences, it was described from plants cultivated in the Huntington Botanic Gardens collected by Baker in the 80's between Calca and Amparaes, but has never been found in habitat again. (3) Echeveria decumbens var. urubambensis is a new variety of this species with dark green leaves and fewer but larger flowers, growing westward from the locality of the type variety. (4) Echeveria laresensis is a new species close to E. decumbens but larger and with light glaucous leaves. In the lower basin of the Sacred Valley (Urubamba River) we found two species of Echeveria: (5) Echeveria ochoae, the largest of all new species, growing only at Pisqak'uchu, at the beginning of the Inca Trail towards Machu Picchu, with conspicuous stems and large obovate or spathulate glaucous leaves, and (6) Echeveria westii from Ollantaytambo, a small, few-flowered, purplish leaved species, discovered by Hutchison and described by Walther in the 50's, locally hard to find in this place. Some other new localities are mentioned.
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Vol. 89 • No. 2