During the first four months of 1944 while the writer was engaged in exploration for sources of rotenone in Colombia, principally in the Eastern Llanos, some opportunity was found for general botanical collecting. Although both time and facilities for this purpose were limited to the extent that somewhat less than 500 numbers were obtained, these collections included a few undescribed plants and several species apparently not so far reported from Colombia. In addition to the two novelties described in the present paper, new species in the genera Axonopus, Grimaldia, Piper, Calolisianthus (genus new to Colombia), Hyptis, Bartsia, Castilleja, Alloplectus and Cephaelis will be described elsewhere by specialists in those groups, and n...
□ The main purpose of this catalogue is to provide a complete listing of the species of liverworts h...
Although the genus Strychnos is very well represented in Colombia, especially on the eastern lowland...
Herrania purpurea (Pittier) R. E. Schultes in Caldasia 9 (1944) 333 / Hevea viridis Huber var. toxic...
During the first four months of 1944 while the writer was engaged in exploration for sources of rot...
During the first four months of 1944 while the writer was engaged in exploration for sources of rote...
There has been no systematic treatment covering the Begorniaceae fo Colombia since A. De Candolle's ...
Colombia has one of the richest floras of any country on earth. It has a large topographic range an...
Recently, señor Gabriel Gutiérrez, Agrónomo Auxiliar de la Sección de Biología Vegetal, kindly submi...
During the past several years the writer has been amassing materials for a proyected illustrated mon...
The new species herein described, of Sporobolus, Calamagrostis, and Agrostis, are based on recent co...
Rumex and Polygonum, of the family polygonaceae, occur in some abundance both in Colombia and in t...
During the course of ethnobotanical investigation in the upper Putumayo in southern Colombia (*), th...
Since the publication of my revision of the American species of the genus Scleria (*), continued fie...
During the past fifteen or twenty years, plant exploration in Colombia has been greatly intensifie...
The new species herein described, of Sporobolus, Calamagrostis, and Agrostis, are based on recent co...
□ The main purpose of this catalogue is to provide a complete listing of the species of liverworts h...
Although the genus Strychnos is very well represented in Colombia, especially on the eastern lowland...
Herrania purpurea (Pittier) R. E. Schultes in Caldasia 9 (1944) 333 / Hevea viridis Huber var. toxic...
During the first four months of 1944 while the writer was engaged in exploration for sources of rot...
During the first four months of 1944 while the writer was engaged in exploration for sources of rote...
There has been no systematic treatment covering the Begorniaceae fo Colombia since A. De Candolle's ...
Colombia has one of the richest floras of any country on earth. It has a large topographic range an...
Recently, señor Gabriel Gutiérrez, Agrónomo Auxiliar de la Sección de Biología Vegetal, kindly submi...
During the past several years the writer has been amassing materials for a proyected illustrated mon...
The new species herein described, of Sporobolus, Calamagrostis, and Agrostis, are based on recent co...
Rumex and Polygonum, of the family polygonaceae, occur in some abundance both in Colombia and in t...
During the course of ethnobotanical investigation in the upper Putumayo in southern Colombia (*), th...
Since the publication of my revision of the American species of the genus Scleria (*), continued fie...
During the past fifteen or twenty years, plant exploration in Colombia has been greatly intensifie...
The new species herein described, of Sporobolus, Calamagrostis, and Agrostis, are based on recent co...
□ The main purpose of this catalogue is to provide a complete listing of the species of liverworts h...
Although the genus Strychnos is very well represented in Colombia, especially on the eastern lowland...
Herrania purpurea (Pittier) R. E. Schultes in Caldasia 9 (1944) 333 / Hevea viridis Huber var. toxic...