~ Tn none of these promising localities was I able to 
178 BOTANICAL OBSERVATIONS IN WESTERN WYOMING. 
viscosissimum Pursh, Peucedanum leiocarpum Hook., Ligusticum 
scopulorum Gray, Lonicera cerulea L., Aster conspicuus Lindl., 
A. integrifolius Nutt., A. elegans Torr. Gray, A. Engelmanni ! 
Gray, Senecio triangularis Hook., S. Andinus Nutt., Hieracium : 
Scouleri Hook., Gaultheria myrsinites Hook., Orthocarpus Parryt 
n. sp. Gray (see Appendix, No, 218), Echinospermum deflecum 
Lehm., Spiranthes Romanzofiana Cham., Fritillaria pudica 
Spreng., Calochortus .eurycarpus S. Watson, Botrychium simplex 
Hitchcock, ~ 
At the head of Yellowstone Lake, fringing the muddy shores of 
one of its numerous inlets, was found in great abundance the 
well known European plant, Subularia aquatica L. This has been 
regarded as one of the rarities on the American continent, and : 
has been termed by Dr. Gray one of “the late lingerers” which = 
has just managed to maintain its foothold in a few isolated New. 4 
England lakes: but it seemed to be quite at home on the banks 1 
of the Yellowstone.. While it is by no means unlikely, as sug- 
gested by Dr. Gray, that from its diminutive size and mode 0 
growth, it may have been overlooked in intermediate localities, its 
_ occurrence here, in such profusion, so remote from any recognized 
connection with an ancestral source, is very suggestive in its bear. 
ing on the question of: geographical distribution, and derivative / 
origin of species. Certainly the localities on this continent where — 
it might have persisted, if originally spread round the northern» 
- hemisphere, are sufficiently numerous not to leave such wide gaps 
as that between Maine and Wyoming! Doubtless, as in other 
apparently unaccountable cases, future discovery either east OF 
west will help fo fill up this chasm. ee 
In the numberless ponds and lagoons which occur near the = 
head of Yellowstone Lake only the usual forms of northern aquat- 
ic plants were noticed, including Ranunculus aquatilis Ly Nuphar 
advena Ait., Utricularia vulgaris L., Lemna trisulca L., Typha (ar 
Jolia L., Sparganium simplex Huds., Zannichella palustris Lo 
- Potamogeton perfoliatus L. . 3 
A s e r Sgeeeeen! | channel ee ee rr ao 
detect the 
lated localities. : 
_ The various confervoid growths and obscure vegetable organ- 
ae _ isms in connection with the numberless hot springs of this reg? ie 
_ Will no doubt reward the special researches of the microscop! 
SSE 
- Nuphar polysepalum Engel., which seems singularly to affect 180- 
- 
~- 
g p 
l 
+ 
eN 
