646 Rydberg : Rocky Mountain flora 



Coleosanthus albicaulis sp. nov. 



Brickcllia Wriglitii and B. caiif arnica A. Gray, Syn. Fl. i - : 

 1 06; both in part. 1884. 



Shrubby at the base, 0.5-1 m. high ; bark of the older wood 

 brownish, striate and fissured, that of the younger branches straw- 

 colored or grayish, hirsute-puberulent, more or less flaky ; leaves 

 short-petioled ; blades broadly cordate, 2-5 cm. long, strongly 

 veined, thick, scabrous-puberulent, crenate-dentate ; inflorescence 

 consisting of small axillary clusters scarcely exceeding the leaves, 

 of 2-6 heads on short peduncles ; heads io-20-flowered ; involucres 

 turbinate ; lower bracts short-ovate, the inner linear, all acutish or 

 obtuse, greenish straw-color ; corolla cream-color ; pappus white. 



This has been confused mostly with C. Wrightii, but the type 

 of that species has more ovate leaf-blades, longer petioles, longer 

 flower clusters, which exceed the leaves, and purple-tinged involu- 

 cre, the bracts of which are very obtuse or rather rounded at the 

 apex. It is rather nearer Coleosanthus reniformis {Brickcllia 

 rcnifonnis A. Gray) ; from which it differs mainly in the longer, 

 cordate, not reniform leaf-blades and larger and sharper teeth. It 

 grows on the foothills and in cafions at an altitude of 1 500-2500 m 



Colorado : Manitou, 1900, Clements {X.y^^) ; Larimer County 

 1 89 1, Coivcii ; Lower Boulder Caiion, 1901, Ostcrlioui 2^11 ; 

 Spring Caiion, 1897, Crandall 2'/8j ; Manitou, iSg6, Slicar ^j8g ; 

 Golden, 1895, Shear J261 ; Mount Harvard, 1896, Cleiiicuts 6j ; 

 Golden, 1895, Rydberg; Boulder, 1885, Letterman. 



Utah: Salt Lake City, 1880, M. E. Jones ig2i ; Wahsatch 

 Mountains, 1869, Watson 4gs ; Provo, 1887, Tracy & Evans jog. 



Grindelia serrulata sp. nov. 



Biennial or perhaps short-lived perennial ; stem glabrous, 

 about 6 dm. high ; leaves sessile, oblanceolate or oblong, acutish, 

 very viscid, 3-5 cm. long, finely and densely serrate ; inflorescence 

 corymbiform ; involucre very viscid, about i 5 mm. broad ; bracts 

 subulate, very squarrose and reflexed ; ligules 7-8 mm. long, i — 

 1.5 mm. wide; pappus-awns apparently smooth; barbules seen 

 only under a compound microscope. 



This is nearly related to G. perennis and G. squarrosa. From 

 the former it differs in the closely and sharply toothed leaves, and 

 from the latter in the oblanceolate instead of ovate or oval leaves. 

 It grows on plains at an altitude of about i 500 m. 



