162 RypBerGc: Rocky MounTAIN FLORA 
Galium subbiflorum (Wieg.) Rydb. 
Galium trifidum subbifiorum Wieg. Bull. Torrey Club 24: 399. 
1897. 
Distegia involucrata (Richardson) Rydb. 
Xylosteum involucratum Richardson, Frank}. Journey 733. 1823. 
Lonicera involucratum Banks ; Spreng. Syst. 1: 759. 1825. 
Distegia nutans Raf. New Fl. Am. 3: 21. 1836. 
Chrysothamnus serrulatus (Torr.) Rydb. 
Linosyris serrulata Torr.; Stansbury, Expl. 389. 1852. 
Chrysothamnus glaucus A, Nelson, Bull. Torrey Club 25: 377- 
1898. 
Chrysothamnus latifolius (D. C. Eaton) Rydb. 
Linosyris viscidifora latifolia D. C. Eaton, Bot. King Exp. 157: 
1871. 
Bigelovia Douglasti latifolia A. Gray, Proc. Am. Acad. 8: 649. 
1873. 
Isocoma Wrightii (A. Gray) Rydb. 
Linosyris Wrightiti A. Gray, P). Wright. 1: 95. 1852. 
Bigelovia Wrightit A. Gray, Proc. Am. Acad. 8: 639. 1873- 
OREOCHRYSUM Rydb. gen. nov. 
Plants with slender horizontal rootstock, leafy, viscid-puberu- 
lent above. Involucral bracts oblong, pale, rather obscurely I- 
ribbed, chartaceous or the outer foliaceous, in about three moder- 
ately unequal ranks. Rays several, short. Disc-corollas narrowly 
trumpet-shaped, deeply 5-toothed. Style-appendages lanceolate, 
_longer than the stigmatic portion. Achenes angled. Pappus white 
or slightly tawny, of soft scabrous bristles. : 
When Dr. Greene made his segregations of the old genus 
Aplopappus, he transferred the type of the genus here proposed to 
Solidago, but it is just as much out of place here as among its old 
associations, 7. ¢., the present genus Srenofus. It is true that in 
general habit it reminds one of a group of species formerly included 
in Solidago, but now segregated as a genus Oligoncuron Small; 
_ the character of the involucre and the style-appendages, however, 
distinguish it from Ol/zgeneuron as well as from Solidago proper. 
