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Three taxa of succulent Crassulaceae: Two Echeveria, and one Sedum were found in the Southern Departments of Perú. (1) Echeveria peruviana, a species described 180 years ago, was not found until recently in its type locality, a full description is provided and more localities in the departments of Tacna and Moquegua are given. (2) Echeveria vulcanicola is a new species with conspicuous stems. It has only been found growing among black lava rocks in the Valley of the Volcanoes in Arequipa. (3) Sedum ignescens is a new species from Arequipa, Apurimac, Moquegua and Tacna, with leaves similar to Sedum andinum but with longer branches, its inflorescences and flowers are slightly smaller than those of Sedum reniforme but yellow with red spots instead of greenish white. Both Echeveria belong to series Racemosae. We consider all three species endemic to Southern Perú.
A new species, Agave oteroi, is described from the Rio Hondo and side drainages near the Calapa bridge along Mexico Federal Highway 135D on the border of Puebla and Oaxaca, Mexico. Its vegetative and flower morphology place this species in the group Marginatae. Agave oteroi is compared to A. kerchovei. A. quiotepecensis, and A. titanota of the Marginatae. The addition of Agave oteroi brings the total number of taxa in the Marginatae to 30; the group ranges from Texas throughout much of mainland Mexico into Guatemala.
A new species of Sansevieria has been documented at thirteen locations across the north of Uganda from near Moyo in the west to the foothills of Mount Morungole in the east, a distance of over 250 km. It is remarkable for the sometimes complete longitudinal folding of the leaves. This is one of several features that distinguish it from S. newtoniana and S. frequens. The conservation status is of least concern.
Exotic invasive plant species are a problem all over the world, and in South Africa many cactus species have become a large problem. Presented here is an example of one which has been successfully controlled by biological agents.