Vol. XXVII, pp. 197-198 
August 13, 1914 
PROCEEDINGS 
OF TUK 
BIOLOGICAL SOCIETY OF WASHINGTON 
A NEW AMELANCHTER FROM SOUTHEASTERN 
CALIFORNIA. 
I’.Y PAUL C. STAND LEY. 
r by permission of the Secretary of the Smithsonian Tnslitntion. ] 
Most of the service-herries of tlie western United States are 
eliaraoterized pubescent foliage and inflorescence. Several 
species, however, ai'e almost or qnitti glabrous, among them 
being xhiidanrltlev nlnifnlid Nutt, and A. poh/rarpn Oreene, two 
jdants which range through the mountains and foothills of the 
Rocky Mountain region. In 1891 Doctor Greene described* a 
completely glabrous plant, Anielnnchier glabra, from the Donner 
L:d-te region of California. Recently the writer had occasion to 
segregate the specimens of this species in the U. S. National 
ir('rharium. Only two were found, one from the type region 
(rl. A. Ifelln- No. 717()) and one from Plumas County, Cali¬ 
fornia {Mrs. Am.cs), both of which agree very well with the type 
and with several other specimens in Doctor (freene’s herbarium. 
In Coulter’s New Manual of Rocky Mountain P>otany (p. 2G()) 
I’rof. Av(‘n Nelson rei)orts this species as occurring “from 
southern Colorado to the Sierra Nevada” and cites as a synonym 
A mcJanrhlcr polgrarpa a species described from southern 
Colorado. To the writ(‘r it seems that A. polgrarpa is distinct 
from A. glabra, and ])rol)ahly also from A. almifolia, to whi(‘h 
it is certainly closely related. 
Resides the two collections referable to Amehvnchier glabra 
there is only one other glabrous Californian spt'cimen in tlu' 
National Herbarium, this Ixdng one collecdvd in the Panamint 
Mountains of the southeastern part of the State, b y the Dea th 
♦Flora Franciscana, p. a'i. 
;5()—Fi;oc. Hioi- Soc. W.vsEi.. Vui.. XXVII. I'.b I. 
( 197 ) 
