M33 PITTONIA. 
A common weed in gardens and waste lands at St. Mar- 
tinsville, Louisiana, where it is colleeted by Rev. Father 
Langlois, and has been distributed by him as G. Carolini- 
anum; but that species has a different mode of growth, a 
gland-tipped and viscid spreading pubescence, and twice 
broader pale petals which are emarginate or obcordate. 
GrEUM SERICEUM. Stems slender, nearly naked and pe- 
dunculiform, erect, 8 to 16 inches high, and, with the tufted 
leaves, arising from a stout branching and subligneous 
caudex, this horizontal or ascending and clothed with the 
dry remains of the foliage of other seasons: tufted leaves 3 
to 5 inches long, suberect, cinereously appressed-silky on 
both faces, the cuneate trifid or quadrifid leaflets } to inch . 
long, crowded and sessile; the few bracts of the peduncle or 
stem sessile, pinnatifid; pedicels and broadly turbinate calyx- 
tube finely tomentulose: the almost orbicular petals very 
large, the expanded deep-yellow corolla an inch broad or 
more. 
Alpine summits of the Ruby Mountains, Nevada, 20 July, 
1896. 
STUDIES IN THE CowrosiTAE.— V. 
l. Certain species of ANTENNARIA. 
The most prevalent dicecious cud-weed of the pastures and 
meadows of eastern North America seems to have remained 
until now almost unnoticed by botanical writers, and en- 
tirely without a name of its own ; the plant having been 
almost universally either confused with, or mistaken for, 
Antennaria plantaginifolia. Before presenting a statement 
of the characters of this most common and singularly ne 
glected weed, it will be needful to give—what, indeed, has 
never yet been given by any author—a fair diagnosis of the 
true plantain-leaved species. 
