Blake — New Asteraceae from Utah and Nevada. 177 



and bearing a label indicating that it was collected in the Sierra Nevada 

 Mountains of California. Dr. B . L . Robinson writes me that the specimen in 

 the Gray Herbarium, of which he has kindly sent two heads for examination, 

 has also a California label, but that it bears the notation "Nevada" in the 

 hand of Dr. Gray. There can be little doubt that both specimens are of 

 the same collection and from Nevada. 



Ptiloria cinerea Blake, sp. nov. 



Perennial (?), about 30 cm. high, freely divaricate-branched, densely 

 cinereous-tomentulose throughout except on the involucres; lower leaves 

 deciduous, the middle ones linear-lanceolate, 2.5 cm. long, about 5 mm. 

 wide across the teeth, acuminate, runcinate-toothed ; the upper entire, 

 lance-subulate, 1 cm. long or less or reduced to scales; heads few or solitary 

 at tips of branches and branchlets, erect, on pedicels 2 mm. long or less, 

 5-fiowered; involucre cylindric, 7 to 8 mm. high, glabrous, the principal 

 phyllaries 5, linear-oblong, obtuse or rounded, the calyculus of few unequal 

 ovate acute or acutish phyllaries half as long as the inner, or less; corollas 

 not well seen; achenes subcolumnar, 3.3 mm. long, 5-angled, whitish, 

 slightly transverse-rugulose, obscurely hispidulous; pappus brownish- 

 tinged, 5.5 mm. long, deciduous in a ring, the setae 14, merely hispidulous 

 for 1 mm. at base, plumose above. 



Type in the U. S. National Herbarium, no. 348173, collected in the 

 Pahrump Valley, Nevada, altitude 610-915 meters, June, 1898, by C. A. 

 Purpus (no. 6049). Duplicate in the herbarium of the University of Cali- 

 f or nil, no. 92336. 



Other specimens examined: Ncvada: Ash Meadows, May-October, 

 1898, Purpus 6080 (herb. Univ. Calif.). 



At once distinguished from most members of the genus by its dense 

 tomentose pubescence. It is nearest P. canescens Greene, of middle Cali- 

 fornia, known to me only from description, which has a similar pubescence, 

 but is said to be an annual with a pure white pappus plumose almost 

 throughout. Unfortunately the specimens of P. cinerea which I have 

 examined, including two loaned by Professor N. L. Gardner from the Uni- 

 versity of California Herbarium, do not show the base completely, but the 

 species appears to be perennial. 



