Dichanthelium linearifolium (Scribn.) Gould

ft -
NEW YORK BOTANICAL GARDEN
qkass herbar;um of ivir. ghorue v. nash
PURCHASED 1911.
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UNITED STATES DEPARTMENT OF AGRICULTURE,
DIVISION OF AGROSTOLOGY,
WASHINGTON, D. C.
January 26, 1897.
Ur. Geo. V. Nash,
Columbia University,
New York, N. Y.
Dear Ur. Nash:
Yours of January 16 th was duly received, and a few days later the
specimens, for which I thank you, came to hand.
I have just now had time to ^examin^the specimens, and agree with
you that the specimens marked and "D" are those of a species distinct
from "E". 'Prom Uuhlenberg’s description of Panicum depauperaturn, I
must think that your specimen marked "E", is that species. I send you
a more mature specimen of the same form, collected here. I also send
you a specimen of what I have regarded as representing Torrey’s Panicum
involutum. In this the leaves are more rigid, and the uppermost leaf
is not so long as in P. depauperatum. Some time ago I received speci-
mens from Prof. Hitchcock, which are exactly like yours marked "C" and
"D"; and, believing it to be a good species, distinct from Panicum depau-
peratum, I named it for him Panicum linearifolium. It is Panicum de-
pauperatum var. laxa Vasey. The panicle is more expanded than in P.
depauperatum, and the spikelets are nearly one-half smaller.
The specimen you communicated under "F", is an unusual form. I have
its counterpart from Ohio, collected near Painesville, by f. C. Werner»
in 1889. I had it down as Panicum werneri, but it may be only a form
of Panicum dichotomum, with narrower and more strict leaves than usual.
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