34 
sometimes crenulate ; bractlets small, lanceolate; calyx about 5’ 
long, equalling or longer than the bracts, puberulent, its longer 
teeth about one-half the length of the tube; corolla about 1’ long, 
showy. 
In rich moist woods and thickets, Western Pennsylvania to 
Tennessee, Virginia and North Carolina. May—July. 
The Genus Hemicarpha in North America. 
By FREDERICK VERNON COVILLE. 
The genus Hemicarpha was published by Nees von Esenbeck 
in the year 1834,* based upon the species zsolepis. The genus is 
now accredited with three species, H. isolepsis, H. micrantha, and 
H. occidentalis, the last of which is restricted to the Pacific coast 
region of the United States, while the other two are widely dis- 
tributed over the earth, centering in the tropical or subtropical 
portions of both hemispheres. At the request of Dr. N. L. 
Britton, the writer presents the following account of the North 
American species. 
HemIcarpHA Micrantua (Vahl) Britton. 
Scirpus micranthus Vah\, Enum. Pl. 2: 254 (1806). Type locality 
given doubtfully as South America. 
Scirpus subsquarrosus Muh]. Gram. 39 (1817). Type specimen 
found on the Susquehanna river, Pennsylvania. 
Isolepis micrantha R. & S. Syst. Veg. 2: 110 (1817). Type spec 
men the same as that of Scirpus micranthus. : 
Isolepis subsquarrosa Schrad. in Schultes, Mant. 2: 64 (1824). ‘ 
Type specimen the same as that of Scirpus subsquarrosus. 
Hemicarpha subsquarrosa Nees, in Martius FI. Bras. 2: part i. 61, 
t. iv. fig. 1 (1842). Type locality the same as that of See : 
subsquarrosus. ag 
Hemicarpha Drummondii Nees, in Martius FI. Bras. 2: part i. 62, 
(1842). Type specimen collected by Drummond - near. — 
Louis, Missouri. 
* Linnzea, g: 287 (1834). 
