STUDIES IN THE COMPOSITAE. 269 
Central Illinois and Ohio; wholly removed from the rest 
of the genus both in habitat and in character; though figur- 
ing in some books as a part of Actinella acaulis. 
* * Perennials, the subscapiform peduncles leafy. 
14. T. ARGENTEA. Actinella argentea, Gray, Pl. Fendl. 
100 (1849). Frequent along the Rio Grande in New Mex- 
ico. Readily known by its dense and close silvery-silky 
pubescence. 
15. T. Ivestana. Caudex stoutish and subligneous, the 
older parts ferruginous-hirsute after the falling of the old 
leaves: leaves spatulate-linear, glabrous and punctate above, 
hirsute beneath: scapes 3 to 6 inches high, sparingly leafy: 
bracts of involucre broadly oblong, glabrate and purplish 
toward the summit but the margin villous-ciliate: pales of 
the pappus narrowly obovate, abruptly long-acuminate but 
with no awn. 
Collected on the Rio Zuni by Woodhouse in 1851; also 
by Dr. Newberry, on Ives’ Expedition, 14 May, 1858. The 
only specimens seen are in the herbarium of Columbia Col- 
lege, , 
* * * Branching annuals or biennials. 
16. T. LEPTOCLADA. Actinella leptoclada, Gray, Pac. R. Rep. 
lv. 107 (1857). Southwestern Colorado to New Mexico and 
Arizona. 
17. T. LINEARIFOLIA. Hymenozys linearifolia, Hook, Ic. t. 
146 (1838). Western Louisiana and adjacent Texas. 
18. T. oprowoiroLra. Annual, erect, rather strict, a foot 
high, with a few long naked pedunculiform branches from 
about midway of the stem: leaves oblanceolate to oblong 
and linear-oblong, obtuse; stem and basal parts of the leaves 
Silky-villous. 
