HARVARD UNIVERSITY 
Voi. 4, No. 2 
CamBRIDGE, Massacnusetts, Marcu 28, 1936 
PERMIAN ELEMENTS 
IN THE FOSSIL FLORA OF THE 
APPALACHIAN PROVINCE. II. 
WALCHIA 
BY 
WiniuiamM C. Darran 
Walchia is a synthetic genus of Paleozoic conifers. 
The foliage-shoots attributed to this genus are charac- 
terized by a pinnate arrangement of the ultimate bran- 
ches. The small, tetragonal, crowded leaves are spirally 
disposed—laxly or densely. A few species have been 
described from shoots bearing terminal cones, but the 
majority are poorly defined vegetative types. Walchia is 
abundant in Permian floras and occurs less abundantly 
in the Upper Carboniferous (or Stephanian). It is one of 
the ubiquitous late Paleozoic genera. 
The genus includes ten or twelve “‘species’’, follow- 
ing the conventional concept of Sternberg.’ In the past 
decade Professor Florin’ of Stockholm began a mono- 
graphic revision of the Paleozoic conifers, and the whole 
group will be placed upon a satisfactory basis. Florin’s 
results have not yet appeared in full, although he has 
already instituted several important new genera based 
upon reproductive shoots. 
"Vers. Fl. Vorwelt. vol. 1. p. 22 
*Proc. Int. Congr. Pl. Sci. (1926) Ithaca. pp. 401-411 
[9] 
