388 PROCEEDINGS OF THE AMERICAN ACADEMY 



234. Galium bore ale L. : the form with a glabrous ovary. 



235. Galium Littellii Oakes. Caule ltevi subsimplici vix ultra- 

 pedali erecto ; foliis quaternis ovali-ovatis quandoque ovato-lanceolatis 

 acutiusculis trinervibus ciliatis casterum saspius glabris ; cymulis pluri- 

 floris longius pedunculitis paniculatis ; pedicellis omnibus longiusculis, 

 fructiferis divaricatis ; corolla? flavidce glabra? segmentis ovatis obtusis ; 

 fructu setis uncinatis crebris setoso. G. circcezans var. montanum 

 Torr. & Gray, Fl. 2, p. 24. Appears identical with the White Moun- 

 tain plant, of which few and imperfect specimens were extant, and 

 it would seem truly distinct from G. circcezans. 



236. Plectritis congesta DC. Prodr. 4, p. 461. 



237. Adenocaulon bicolor Hook. Bot. Misc. 1, p. 19, t. 15. 



238. Machjsranthera canescens Gray, PI. Wright ; a narrow- 

 leaved variety, which includes Dieteria divaricata Nutt. 



239. Sericocarpus rigidus Lindl., in Hook. Fl. Bor.-Am. 2, p. 14. 



240. Sericocarpus Oregonensis Nutt. ; Torr. & Gray, Fl. 2, 

 p. 103. Probably only a larger form of the preceding. 



241. Aster (Calliastrum) radulinus, n. sp. This plant, which 

 grows also in California (and is probably A. Radula Less, in Linnoea, 

 which Nees has referred to his A. Ghilensis = A. Durandi Nutt.), is 

 difficult to distinguish from A. conspicuus Lindl., except by the much 

 diminished size of all the parts and the turbinate involucre. Mr. 

 Hall's specimens vary from 5 to 15 inches in height, and the involucre 

 is barely 4 lines long. The rays appear to be white. On the other 

 hand it approaches A. montanus of Richardson ; but the involucre is tur- 

 binate, its scales more imbricate and appressed, the leaves rougher, &c. 



242. Aster (Orthomeris) Engelmannii Gray, var. ledophtlla. 

 Minor, pedalis ; foliis obtusis subtus pube molli derasibili cinereis vix 

 sesquipollicaribus ; involucri squamis sensim acuminatis. A remark- 

 able variety, which one of the plants of Lyall's collection serves some- 

 what to connect with the Rocky Mountain form ; but the small size of 

 the leaves (which are very numerous) and the slender-tipped purple 

 involucral scales are peculiar. The specimens are scanty. They were 

 collected high up in Cascade Mountains. 



243. Aster Hallii, n. sp. This is apparently a distinct and un- 

 published species, of the Dumosi group, but requires study. 



244. Aster Douglasii Lindl. : in various forms. 245. Per- 

 haps a variety of the last, but with lax and more foliaceous involucral 

 scales. 



