BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
CampripGak, Massacnusetts, June 19, 1953 VoL. 16, No. 4 
PLANTAE AUSTRO-AMERICANAE VIII 
DE PLANTIS PRINCIPALITER VALLIS AMAZONICIS NOVIS VEL 
CRITICIS NOTAE DIVERSAE 
BY 
Ricuarpb Evans Scuutres' 
StrupiEs which have been carried on during the past two 
or three years have disclosed in recent plant collections 
from South America a number of species which are new 
to science or otherwise noteworthy. This article is a con- 
tinuation of a series dedicated to the widening of our 
understanding of the flora of northern South America, 
with special reference to the Amazon basin. 
[t is with pleasure that I acknowledge the collabora- 
tionof Mr. Jason R. Swallen (Gramineae); Dr. Harold 
N. Moldenke (Hriocaulaceae); and Mr. Emery C. 
Leonard (Acanthaceae). 
GRAMINEAE 
Panicum molliculmum Swadlen sp. nov. 
Annuum (/); culmi tenuissimi, decumbentes, 5-15 
em. longi, glabri; vaginae internodiis 4} breviores, pilo- 
sae; ligula brevissima, ciliata; laminae 5-10 mm. longae, 
2-4 mm. latae, obtusae, basi subtruncatae, hirtellae; pan- 
iculae terminales et axillares, simplicissimae, pedunculis 
1Botanist, Division of Rubber Plant Investigations, Bureau of Plant 
Industry, Soils, and Agricultural Engineering, Agricultural Research 
Administration, U. S. Department of Agriculture; Research Fellow, 
Botanical Museum of Harvard University. 
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