9 



160 MR. NUTTALL'S DESCRIPTIONS OF NEW 



longish petioles. Upper leaves nearly sessile ; calyx very hirsute ; corolla pale lilac 

 rose ; ovary with four seeds ; stamens much exserted ; it has a general resemblance to 

 P. circinata. The P. integrifolia of Torrey, has four very rugose convex elliptic 

 seeds. 



Hab. In the Rocky Mountains, and Blue Mountains of Oregon. (Nuttall. ) 



P. *GLANDULOSA. Annual or biennial, very pilose, with a soft, short, shining pubescence ; the stems and 

 calyx covered with blackish, viscid, resinous glands; leaves pinnatifid, the segments somewhat 

 toothed, short and roundish ; flowers shortly pedicellate in crowded circinate spikes ; segments of the 

 calyx oblong; stamens exserted ; style pilose. 



Four to six inches high, with a long tap root, as in biennials. Leaflets two to 

 three lines long, toothed and rounded, somewhat oblique, resembling almost the frond 

 of a small fern. Flowers blue and showy. Capsule four seeded ; seeds elliptic 

 concave ; internally, where attached to the placenta, roughened all over with minute 

 asperities. 



Hab. About Ham's Fork of the Colorado of the West, on dry, bare hills. 

 (Nuttall.) 



NAVARRETIA. 



N. *MiNiMA. O- Smooth, dwarf, depressed and branched from the base ; leaves somewhat bipinnately 

 divided, with few and divaricate, subulately sharp segments ; floral leaves simply pinnately dissected ; 

 calyx with three of the segments usually entire ; corolla longer than the tube of the calyx ; ovary 

 cells 2-seeded. 



Seldom more than an inch high; segments of the leaves quite acicular ; flowers 

 small and wliite, the tube exserted a little beyond the calyx; the stamens slightly 

 exserted. 



Hab. Plains of the Oregon, near Walla-Walla. (Nuttall.) 



ERIOGONUM. 



E. *ACAULE. Very dwarf, stemless and ctespitose, the caudex much divided, leaves whitely tomentose, 

 oblong-linear, reflected so as to be semi-cylindric ; involucrum wholly sessile, few flowered, 4 or 

 5-toothed, the teeth very obtuse. 



A very remarkable dwarf species, forming dense tufts, independent of the 

 subterraneous woody caudex, not an inch high, whitely tomentose. Leaves about 

 a line wide and about three or four long. Flowers yellow and bright, externally 

 somewhat pubescent, as well as the germs. 



Hab. On the summit of the Rocky Mountains, near the Colorado of the V/est, 

 at the highest land. 



E. *ANDiNUM. Stemless, caespitose, the caudex much divided ; leaves small and spathulate, wholly and 

 whitely tomentose, reflected on the margin ; scapes all radical, terminating in a single capitulum ; 

 involucrum divided nearly to the base, the segments about eight, leafy; flowers yellow, small. 



