Cirsium scopulorum (Greene) Cockerell

"CANADA DEPARTMENT OF AGRICULTURE

RESEARCH BRANCH

PLANT RESEARCH INSTITUTE
CENTRAL EXPERIMENTAL FARM

locember 20, 1963

YOUR FILE No:

OUR FILE NO:

Dec. 12,1963

OTTAWA. CANADA

Dr. A. Cronqyist,

The New York Botanical Garden,

Bronx Park,

New York 58, N.Y.,

U.S.A.

Dear Dr. Cronquist,

Herewith is a piece of the strange Cirsium that I was
trying to match with specimens at N.Y. There is no need to return it
If you have any opinion regarding name or affinity we shall be
pleased to hear.

While at N.Y., I thought that Rydberg & Garrett 8885 was
the only near-match. This specimen is filed under C. oreophilum,
but differs from the others in the folder. Now I think that the
match may be better than I at first thought — my memory of our
collection was imperfect. R. & G. 8885 is not a complete plant so
doesn’t look as strange as does our specimen, which is:

10 dm tall, a single stout (1?, mm) woody,brown, ribbed stem,pilose-
long shaggy h8irs, more or less papallel to stem; numerous short
branches on upper third of main stem, these branched again, heads
single on short ""branchlets"" - approx. 40 heads per plant
Leaves numerous, ascending, stiff, to 20 cm long X 5 cm - as sample,
base clasping, short-decurrent, outline elliptic-oblong.

If our plant does match this ""oreophilum"" it will be little
advance -- for I don't think 8885 is a good oreophilum 1 Also I
don’t know what to make of C. oreophilum, which leaves me back with
Rydberg fBTBC 37,555) ’.

Very truly

es to some extent resemble
it is the same thing. Our
iny leaves, sore as less
®re# the pubescence of the
long, woolly hairs which
ply so many, and it also
as in C. undulatum etc.

•are concerned, they are,
anoral run of material
k Garrett 6612, La Sal lit s.,

3 Creairoeni for Tidestrom’s
rer, has the head3 in a

T

>opii.lation, one might be~
js to an undescribod specics.
ion it is perhaps more likely
«ran as one of the parents.
ox '¡aiowledge) of Cirslunxj

dncerely yours,

.rthur Cronquist
Curator

HERBARIUM OF
THE NEW YORK BOTANICAL GARDEN

PLANTS ? F UTAH

nd. 1235>3

Cirsium sp. aff C. scopulorum (Greene) Cockerell

GRAND CO.: Spruce-pine forest in the LaSal Mts. Fragments
from specimen 10 dm. tall, with a single, stout, shaggy-
pilose stem, repeatedly branched in the upper third, the
heads about h0, solitary on short branchlets. Leaves
numerous, ascending, up to 20 cm. long and $ cm. wide,
clasping and shortly decurrent. Corolla pink.

N = 17, fide R. J. Moore
collected by Gillett & Mosquin	August 2, 1963

BOTan,"