542 Piper: West AMERICAN 
Very close to Z. arida, differing in its smaller blue flowers, 
softer pubescence, and the smaller fruit without granulations on the 
ventral side. 
‘8. Lappula Cusickii sp. nov. 
Perennial, erect or ascending, 15-30 cm. high, the caudex 
thickly clothed with old leaf bases, the whole plant pale bluish- 
green with a very closely appressed fine pubescence, except on the 
petioles where it is hirsute-ciliate : radical leaves lanceolate, acute, 
- 4-8 cm. long, the petioles equaling the blades; cauline leaves 
linear-lanceolate, acute, all but the lower sessile by broad bases, 
2-5 cm. long: inflorescence corymbose, the false racemes 6-8- 
flowered: calyx-lobes linear, acute, 2 mm. long: corolla blue, 
5-6 mm. broad ; appendages short pilose, about as long as broad, 
the protuberance oblong, as long or longer; immature fruit 
5 mm. long, the back flat, muriculate, and bearing about 10 short 
glochidiate bristles; marginal prickles flat, separate and rather 
distant, all glochidiate, shorter than the diameter of the nutlet. 
Logan Mountains, eastern Oregon, 6500 feet altitude, in the 
shelter of juniper, 1 July 1901, W. C. Cusick, 2623. 
This species is related to L. arida, differing in its smaller blue 
flowers and the separate marginal prickles of the nutlet. 
9. LapPULA CAERULESCENS Rydberg, Flora Montana, 328. 190° 
This species is readily distinguished from any other described 
species by the long hairs of the corolla-appendages. At least one 
other undescribed species represented in the Gray herbarium by 
too scanty material, has a very similar corolla-appendage, S° that 
this character alone can not be entirely relied upon. 
The species as here interpreted shows considerable variation 
as regards pubescence, and in some specimens the flowers are 
apparently white. 
Montana: Bridger Mts., 18 July 1897, Rydberg & Bessey; 
4899. 
Wyomine: Mammoth Hot Springs, 30 June 1899, A. & & 
Nelson, 5602. 
Uran: Salt Lake City, May 1891, Eastwood ; Salt Lake 
City, 30 April 1898, W. Travers; Salt Lake City, May 1889 
Sarah K. White; Wasatch Mts., May 1869, Watson, 860; Fue 
Valley, June 1874, 2. arry, 1772. Inthis plant the pubescence 1S 
hirsute, and it was included by Dr. Gray under Echinospermum 
