CATALOGUE. 149 
TownsENpDIA stricosa, Nutt—Valley of the Upper Arkansas, Colo- 
rado (517, 853). 
TownsrnpiA scapicerA, D. C. Eaton (Vol. V of Fortieth Parallel Sur- 
vey, p. 145, pl. xvii, figs. 1-7).—Nevada. 
ASTER TANACETIFOLIUS, H. B. K. (Macheranthera tanacetifolia, Nees. )— 
Biennial, erect, 6'-2° high, usually much branched, pubescent or viscid, 
or sometimes nearly glabrous; leaves once to three times pinnatifid, the 
divisions bristle-tipped; involucre hemispherical, 3-8’ in diameter; scales 
imbricated in several series, lanceolate or linear, always acute, and some- 
times with very long, tapering, herbaceous tips; rays about 25, violet, 
twice as long as the disk-flowers; achenia with two strong marginal ribs, 
and several on either face, very villous; mature pappus reddish—Colorado 
(854, 491, 505, 19). Also from Arizona and New Mexico. 
ASTER CANESCENS, Pursh. (Macheranthera canescens, Gray ; also Eaton 
in Bot. King.)—Very variable, and obtained by the Expedition from Colo- 
rado, Arizona, New Mexico, Nevada, and Utah. 
AsTER CoLoranoensis, Gray. (Proc. Amer. Acad. xi, 76.)—420 and 455 
of the Colorado collection, in which it was distributed as Macheranthera 
canescens. Stems 2-4’ high, several from the same root, each terminated by 
a single head, tomentose or canescent ; leaves coriaceous, the lowest spatu- 
late, the upper lanceolate or linear, all sharply serrate, having the teeth 
bristle-pointed ; involucre hemispherical, the acute herbaceous-tipped scales 
narrowly lanceolate, canescent, and in 2-3 series; rays 35-40, large, 
bright purple; achenia ribbed, turbinate, and densely canescent or villose ; 
pappus rusty-colored. 
Prof. T. C. Porter raises the question as to whether this may not be 
Dieteria pulverulenta, Nutt. I have not access to authentic specimens of 
this; but there certainly are many strong resemblances from the descrip- 
tion in Flora of North America by Torrey and Gray. See vol. 2, p. 101. 
Unlike the others of the same section, this (Aster Coloradoensis) is perennial.— 
Puate VII, B. Natural size. 9. Ray-flower. 10. Ray-flower style and 
stigma. 11. Disk-flower. 12. Disk-flower style and stigma. 13. Ache- 
nium and pappus of disk-flower. About 10 diameters. 
