Enumeration of Plants of the Rocky Mountains. [259] 33 
335. Asclepias verticillata, L., dwarf form. 
336. Abronia (Tripterocalyz) cycloptera, Gray. 
337. Abronia ge ieee Nutt., figured in the second volume of the 
Pacific Rail Road Repo 
338. Acer glabrum, Torr, var. A, tripartitum, Nutt. 
340. Alnus viridis, DC. 
_~ 341, Saliz glauca, L. Mase. 
- 342. Salix cordata, Muhl. ? 
343. Salix reticulata, L. (S. sericea, Pursh.) se pres 
344, Salix discolor, Willd. 
345. Populus tremuloides, Michx. 
846. rt he ite poet Anthericum, L. 
. Calochortus us, Benth., ex Torr. The species greatly need 
.09 ¢ 
ad 
revision and ai Sannin 5 
48. Sir eb es Pog et dag s, DC. 
349. num, Nutt. in Gray, Melanth., p.110. A-rare 
plant, one of thea sii Ohi ch go to demonstrate the futility of an ordi- 
nal a geet! of the adtmenpecal from the Liliacee. Also collected 
pe Mr. ard. The specimens in both cases not in good state for 
one 
xamina’ 
350. Adium email Roth 
- 851. Zygadenus s, Natt, 
352. CenalicPicea one R. 
358. Listera cordata, 
. 354. Calypso Boris, Salish, bg spruce woods; not uncommon. 
_.. 355. Platanthera obtusata, L 
“356. Platanthera kgpiPhores: ca. To this, as I suspected long ago 
(in Ann. Lyc. N. Y., when endeavoring to distinguish this species from 
the next), belongs ‘the Habenaria dilatata of Hooker's Exot. FL, t. 95. 
ers eeni “ig 
‘low i 
. “ei. Platanthera dilatata, Lindl. Orchis dilatata, Pursh, Habenaria 
dilatata, Gray, in Ann. Lye. N.Y. “In sig yale Flowers 
white. Since my observations upon these two sp moan terty 
dried specimens, been tempted to re- -unite thems. Chie oie: has re- 
cently done, in his memoir of Arctic — It is wie as , to err in 
combining as in unduly separating spec ntly examined 
the two alive, in view of their ariiaigetidate for imation, (which I may 
ribe), I would now state that the structure and disposition 
of th Pienitalia and the shape of the gorge of the flower is so different, 
that, while P. dilatata er its congeners in general) can rarely if ever 
self-fertilize, P. hyperborea readi ly does so, much in the mannar of rys 
' recently asteitell by Darwin; the former has almost parallel 
ith a narrow stigmatic surface and a sort of trowel-shaped 
elsewh 
erect position 
Is, are the boge and elonga 
cm hyperborea the at rn aig from the base, einied an raver 
Borge, the more exposed stigma is broad and transverse (as figured by 
_» 339, Betula alba, L. var. , glutinosa, forma ncgee Regel, or yee ofA 
