Rhodochiton volubile represents one of the many local 
endemics which are found in southern Mexico. It is 
known chiefly through the many illustrations of it which 
have appeared in horticultural publications. Very care- 
fully drawn figures are to be found in the Botanical Mag- 
azine 61 (1834) t. 83367 and in the Botanical Register 8 
(1885) t. 1755. 
Herbarium material of this plant is extremely rare. 
Most of the existing specimens, moreover, represent col- 
lections which were made in botanical gardens. Field col- 
lections of this species are herbarium rarities. I am aware 
of only five such collections. Munz (2) cites nine herbar- 
ium specimens, representing the eight collections which 
were available to him for examination. Of these, only 
two are field collections; the other six were taken from 
cultivated plants. Munz did not examine and does not 
refer to the Hartweg material which is in the herbarium 
at Kew and which was cited by Hemsley in Godman & 
Salvin Biol. Centr.-Am. 2 (1882) 442, nor to the Galeotti 
material which was cited by Martens and Galeotti in 
Bull. Acad. Roy. Bruxelles 12, No. 7 (1845) 38. 
The collections represented by: Hartweg s.n., Gal- 
eotti 1069, Conzatti & Gonzalez 756 and Schultes 661 are 
from the mountains of the northeastern portion of the 
State of Oaxaca. The Nelson collection, although it is 
known to be from the State of Oaxaca, lacks information 
concerning the precise locality where it was made. Since 
Nelson made extensive collections in the northeastern 
part of Oaxaca in 1894, especially in the mountains of 
the Districts of Villa Alta and Choapam, there is every 
reason to believe that his specimen of Rhodochiton volu- 
bile, preserved inthe United States National Herbarium, 
came from the same part of the state as the other four 
collections. 
The restricted distribution of Rhodochiton volubile is 
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