< 
49 
oles from an inch and a half to two inches in length, pinnately 
parted or divided into broad or comparitively narrow inch-long, 
cleft divisions, dark above, light beneath, and delicately strigose ; 
middle cauline leaves short-petioled, upper sessile, all pinnately 
cleft or parted; short spikes crowded during anthesis in a naked 
spike-like thyrsus about 3 inches long by 34 inch thick, in fruit be- 
coming more elongated and open; flower buds violet blue, becom- 
white-blue on opening; flowers open-campanulate, cleft barely to 
the middle, and bearing the vertical appendages of P. sericea ; an-* 
thers oval; styles 2-cleft at apex, these with the stamens hardly 
longer than the corolla; capsule ovate, short-a€uminate, con- 
tained within the marcescent-persistent ,coxolla, 12+22-seeded; 
seeds oblong-oval, generally irregularly and strongly angled by 
pressure, acute at one end, less so at the other, longitudinally and 
rather deeply alveolate, the walls’ separating the alveolations thin 
and sharp. 
Common in moist, natural meadows of Craig Mountains, Nez 
Perces county, at about 3000 ft. alt. A single specimen in fruit 
was found on the St. Marie’s River, Kootenai county, proving 
that the plant must be well distributed in Northern Idaho. That 
the species is closely related to P. sericea A. Gray, is evident on close 
inspection. In aspect, however, it is very different, and the rela- 
tionship would hardly be suspected. It differs from this species in 
being nearly glabrous, erect, and 2-3 times as high; in its stamens 
and style being never more than half again as long as the corolla; 
in its thyrsus being much more slender and rather longer; finally 
in the deeper alveolations of its strongly angled seeds. It differs 
from the var. Lya//i in its taller stature, in its narrower and longer 
thyrsus, and, if the flower and seed characters are those of the 
type, in these also. As the writer has no good specimen of the 
variety, on the last points he is doubtful. 
CLAYTONIA ARENICOLA N. sp. 
Annual with delicate, fibrous roots, 2-6 inches high: radical 
leaves linear-spatulate, the broadest not over 2% lines wide (gen- 
erally about a line wide), I-2 inches long, tapering from near the 
obtuse apex into a delicate petiole ; cauline leaves a single pair, 
similar to the radical but shorter, opposite and distinct: racemes 
numerous and prolifically flowered, the flowers on pedicels, Yy-% 
inch long; petals pink-white, 3 lines long, emarginate ; seeds % 
line long, shining and resembling those of C. Siéirica but only 
half.as large. 4 
Dry, sandy banks along streams as well as dry pine woods, 
Ma Rat Carden 
