266 



The citations of "Nelson" and "Rydberg," without reference 

 to volume or page, refer always to the well-known works by 

 these authors treating of the plants of Colorado.* 



A special effort was made to find orchids, but only the three 

 following species were obtained. 



1. LimnorcMs viridiflora (Chamisso) Rydb. In a swampy place 



at Estes Park Village. 



2. Lysiella ohtusata (Pursh) Rydb. Longs Peak Inn. Found by 



my wife, who was so fortunate as to observe a moth 

 visiting the flowers, evidently serving as an agent in 

 pollination. A specimen captured carries a bright yellow 

 pollinium on its head, the base of the stalk attached to the 

 front of the moth's left eye. The moth proves on exam- 

 ination to be a perfectly typical Rheumaptera tristata (L.) , a 

 species common to the northern parts of America and 

 Europe. Rydberg states that Lysiella ohtusata occurs in 

 a single European locality, in northern Norway. It is 

 interesting to know that it may there be visited by the 

 same species of moth. 



3. Coeloglossum hracteatum (Willd.) Pari. Longs Peak Inn. 



Found by my wife. This appears to be very rare in 

 Colorado; Rydberg merely cites it from Colorado, adding 

 "exact locality not given." Nelson gives the distribution 

 as "Northern Wyoming, eastward and to the Atlantic," 

 thus excluding Colorado altogether. Our plant is perfectly 

 characteristic of the species. 



4. Fopulus tremiiloides minor Cockerell, 1891. (Nature Notes, 



p. 14.) Abundant about Longs Peak Inn. This is the 

 earlier name for the western aspen, but if it is regarded as 

 a distinct species, it will according to the botanical rules 

 stand as P. aurea Tidestrom, 191 1. 



5. Bistorta bistortoides (Pursh) Small. A common plant of 



meadows at Longs Peak Inn, alt. 8,956 feet. In Wash- 

 ington State, Piper cites this as a species of the Arid 

 Transition Zone; with us it is especially characteristic 

 of the Canadian. 



* Coulter and Nelson, New Manual of Botany of the Central Rocky Mountains, 

 January, 1910; P. A. Rydberg, Flora of Colorado, 1906. 



