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 
Cha: nactis, 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 ABolophyta alpina, which by Dr. Gray was 
tranferred to Parthenium. 
Chamaechaenactis scaposa (Eastw.) Rydb. 
Chacnactis scaposa Eastw. Zoe 2: 231. 1891. 
Rydbergia Brandegei (A. Gray) Rydb. 
Actinella grandifiora glabrata Porter, in Port. & Coult. Syn. Fi. 
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. 
Hymenox. ee Richardsontt macrantha Cockerell, Bull. Torrey Club 
3t: 1904. 
Piece: Professor Cockerell was correct in uniting Hywzen0xyS 
and Picradenia under the older generic name. To his conception 
of species I am not willing to assent, however. In this respect ! 
would rather agree with Dr. Greene and Prof. Aven Nelson. The 
changes in nomenclature of the Colorado species are here given. 
Hymenoxys pumila (Greene) Rydb. 
Picradenia pumila Greene, Pittonia 3: 271. 1808. 
Hymenoxys Richardsonii pumila Cockerell, Bull. Torrey Club 31: 
472. 1904. 
