146 RYDBERG: Rocky MOUNTAIN FLORA 
Xylorrhiza lanceolata sp. nov. 
Shrubby perennial, with white stems; branches more or less 
villous; leaves lanceolate, 4-6 cm. long, more or less villous, 
especially when young, reticulately veined, dentate with spinu- 
lose-subulate teeth, which are directed forward and then fal- 
cately curved outward ; peduncles 1-2 dm. long ; involucre fully 
I cm. high, 15-20 mm. broad; bracts lance-subulate, villous 
and slightly glandular, attenuate and spinulose-tipped, the inner 
about equaling the disk, a few of the outer ones often longer and 
squarrose ; rays purple, about 2 cm. long; achenes hirsute ; pap- 
pus brownish tawny. 
This is related to Xylorrhiza tortifolia (T. & G.) Greene, but 
differs in the broader leaves and their teeth. In X. sortifolia, the 
body of the leaves is linear or narrowly linear-lanceolate, the teeth 
are shorter and broader and diverge at almost right angles to the 
midrib ; the outer bracts are neither elongated nor spreading. 
Uran: St. George, 1877, Palmer 208 (type, in herb. Colum- 
bia Univ. and N. Y. Bot. Gard.); South Utah, 1875, 7, £. John- 
son; 1874, C. C. Parry gt (2). 
- Unamia alba (Nutt.) Rydb. comb. nov. 
Inula ( Chrysopsis) alba Nutt. Gen. 2: 152. 1818. 
Aster albus Eat. Man. Bot. 127. 1829. Not Aster albus Willd. 
1826, 
Doellingeria ptarmicoides Nees, Gen. & Sp. Ast. 183. 1833. 
Chrysopsis alba Nutt.; Nees, Gen. & Sp. Ast. 18 3, aS a synonym. 
1833. 
Diplopappus albus Hook. Fl. Bor.-Am. 2: 21. 1834. 
Flehastrum album DC. Prod. §: 264. 1836. 
Encephalus albus Nutt. Trans. Am. Phil. Soc. II. '7: 299. 1840. 
Aster ptarmicoides T. & G. Fl. N. Am. 2: 160. 1841. 
Unamia ptarmicoides Greene, Leaflets 1: 6. 1903. 
From the various disposition which has been made of this 
plant, it is evident that the species has been out of place in all the 
genera to which it had been referred. I therefore agree with Dr. 
Greene that it represents the type of a distinct genus. Unfortu- 
nately Dr. Greene did not use the first available specific name, 
which is here accepted. Usually the original publication is given 
as Chrysopsis alba Nutt. Gen. 2: 152. 1818. In that work 
