156 Rydberg : Rocky Mountain flora 



coriaceous, white-strigose below, sparingly hirsute and punctate 

 above. Involucral bracts about twelve, in two series ; the inner series 

 longer and with scarious-margined reddish tips. Corolla flesh- 

 colored, with equal lobes. Stamens included. Style-lips broad. 

 Achenes clavate, densely villous. Pappus of eight nearly equal 

 scales, with prominent midrib and erose tips. 



Miss Eastwood, the discoverer of the plant, referred it to 



Chamactis, to which it is not closely related, resembling this genus 



only in the color of the corolla. The structure of the fruit and 



pappus would place it nearer Bahia and Tetraneuris. In general 



habit it resembles most that exceedingly rare plant described by 



Nuttall under the name Bolophyta alpina y which by Dr. Gray was 



tranferred to Partheninm. 



J Chamaechaenactis scaposa (Eastw.) Rydb 



CJiacnactis scaposa Eastw. Zoe 2 : 231. 1891. 



' Rydbergia Brandegei (A. Gray) Rydb. 



Actinclla grandiflora glabrata Porter, in Port. & Coult. Syn. Fl. 

 Colo. 76. 1874. 



Actinella Brandegei Porter; A. Gray, Proc. Am. Acad. 13 : 373. 



1878. 

 Rydbergia glabrata Greene, Pittonia 3: 270. 1898. 



/ 



Hymenoxys macrantha (A. Nels.) Rydb. 



Picradenia macrantha A. Nels. Bot. Gaz. 28 : 130. 1899. 

 Hymenoxys RicJuxrdsonii macrantha Cockerell, Bull. Torrey Club 



31 : 475. 1904. 



Evidently Professor Cockerell was correct in uniting Hymenoxys 

 and Picradenia under the older generic name. To his conception 

 of species I am not willing to assent, however. In this respect I 

 would rather agree with Dr. Greene and Prof. Aven Nelson. The 

 changes in nomenclature of the Colorado species are here given. 



y 



Hymenoxys pumila (Greene) Rydb. 



Picradenia pumila Greene, Pittonia 3 : 271. 1898. 

 Hymenoxys Richardsonii pumila Cockerell, Bull. Torrey Club 31 : 

 472. 1904. 



