128 BOTANICAL CAZETTE [avcust 
agreement in Nutt. Gen. 173 and T. & G. FI. that the leaves are“ sericeous!y 
(silky) villous,” and that the plants are aggregated in dense tufts, suggests 
the separation that is now proposed. 
Besides a large series of plants from near Laramie, specimens af 1 
simplex have been examined as follows: T. A. Williams, Pine Ridge, Neb; | 
J. Schenck, Neb., 1893; H. J. Webber, Pine Ridge, Neb., 1889; Henny 
Engelmann, North Fork of the Platte, 1858; A. S. Hitchcock, Kan, 1845, 
no. 289; C. H. Thompson, Kan., 1893, no. 169; Capt. Bryan's Expedition, 
Lower Pole Creek, Wyo., 1858; R. S. Williams, Great Falls, Mont., 189) 
no. 82; G. E. Osterhout, Livermore, Colo., 1898; M. E. Jones, Cheyenit 
Cafion, Colo., 1878 ; Hall & Harbour, no. 275. 
Tetraneuris incana, n.sp.—Root rather slender, simple or branched: : 
~ 
the crowns, silvery-white with an appressed pubescence, linear-oblat: 
ceolate, 2-4™ long: scapes naked, single from the crowns, sles 
curved-ascending, 1-2 high, the fine silvery pubescence sii 
spreading: involucre silvery-silky, bracts few, shorter than the 1 hip 
disk, the outer oblong, obtuse, the inner spatulate, scarious marg! 
rays few, the ligule as long as the disk: disk corollas sprinkled ® : 
resinous globules and toward the summit strongly thickened by a den 4 
penicillate, glandular beard: pappus scales oblong, aristat: - 
slender, nearly as long as the corolla, pubescent. 
This rare species is strongly marked in its close, silvery pub 
nearly simple caudex, its silvery involucre, and its dense coat of gla 
on the corollas. The only collections of it at hand are no. 393) © Nels 
near Fairbanks, July 11, 1894 ; no. 5006 (type number), by Mr. Elias aie 
Wallace creek, July 30, 1898; and a specimen by Mrs. Muth, Lewis & i 
co., Mont. Its habitat is white clay ridges among the barren hills. 
escenses 
TETRANEURIS TORREVANA (Nutt.) Greene, l. c. 
Actinella Torreyana Nutt., Trans. Am. Phil. Soc. 7 +379: ae et | 
A strong species of the central-eastern Rocky mountains: wee 
eral forms, but always tufted, strongly punctate and neatly = i | 
except on the caudex ; somewhat variable as to the width ~ ee 
of the leaves. My no. 48ro, from the Platte hills neat wee 
June 18, 1898, are nearly typical ; nos. 4571 and 4747) Jun 
the Tertiary clays of south-central Wyoming have broader, 
