Floristic work in 1975 in the Animas Mountains of southwestern New Mexico has revealed the presence of populations of plant taxa previously un- recorded in New Mexico. These populations reflect three distinct distributional patterns. Most of the taxa are endemic to the montane floras of the northern Sierra Madre Biotic Province. The Animas M/ountain populations represent the north- eastern end of the ranges of these taxa. Two winter annual taxa represent disjunct populations of far western United States taxa. Finally, two other taxa represent geographically isolated and marginal populations of taxa from regions to the south and east of the Animas Mountains. Explanations for known geographical pat- terns are offered for some of the taxa. The endemic taxa are Brickellia simplex Gray, Castilleja patriotica Fern., Delphinium andesicola Ewan subsp. andesicola, Plummerta ambigens Blake, Silene thurberi Wats., Bidens lemmoni Gray, Cheilanthes pringlei Davenp., and Gnaphalium pringlei Gray. The disjunct taxa from far western United States are Calandrinia ciliata (Ruiz & Pav.) DC. var. menziesii (Hook.) J. F. Macbride and Caucalis microcarpa Hook. & Arn., and the disjuncts from the south and east are Cyclanthera dissecta (Torr. & Gray) Arn. and Tillandsia recurvata L. Collections representing significant range extensions were obtained during a floristic inventory and phytogeographical analysis of the Animas Mountains of southwestern New Mexico (Wagner 1977). These new records reflect three general types of distributional patterns encountered for many taxa of the flora. The largest number of new records are endemic taxa to the floras of the Animas and other basin and range mountains of southeastern Arizona and northern Mexico. The Animas Mountains are the recorded northeastern geographical limit for these taxa. Their ranges extend from the Animas Mountains southward to the isolated mountains of the northern section of the Central Plateau of Mexico or to the north end of the Sierra Madre Occidental, west to the Chiricahua and Huachucha Mountains, with several also occurring farther west or north in the Santa Rita, Santa Catalina, or Pinaleno Mountains of southeastern Arizona. The other two patterns are represented by two new records each. All are short-