454 PROCEEDINGS OF THE AMERICAN ACADEMY 



ments with 3 to 5 linear acute lobes (3 or 4 lines long) : stem exceed- 

 ing the leaves (2 to 4 inches high), bearing a single leaf and an umbel 

 of 1 to 3 short fertile rays ; involucels unilateral, of 2 or 3 narrow 

 acuminate bracts : fruit very shortly pedicellate, oblong-elliptical, 4 or 5 

 lines long, the thin wings as broad as the body ; vittoe narrow, solitary 

 in the intervals, 4 to 6 on the commissure. — On the highest summits 

 of the Eagle Creek Mountains, Union County, Oregon ; W. C. Cusick, 

 September, ] 885, in fruit. Flowers probably white. Resembling small 

 forms of P. simplex, but the leaf-segments ternate or quinate, and the 

 vittfB more than a single pair on the commissure. 



Paronychia Wilkinsoni. Perennial, with numerous stems from 

 the branching caudex, puberuleut throughout: stems 14 to 3 inches 

 high, with numerous very short nodes : leaves linear-subulate, nerve- 

 less, attenuate from near the base to the pungent apex, 2 or 3 lines 

 long, the narrow scarious stipules as long and at length spreading : 

 flowers in close terminal cymes, 1^- lines long, the white awns half the 

 length of the sepals and soon spreading. — On gravelly hills south of 

 Chihuahua, first found by Edward Wilkinson, a collector in natural 

 history at that place ; C. G. Pringle (n. 341). Resembling P. Jamesii, 

 from which it differs especially in the much shorter internodes, the at- 

 tenuate nerveless leaves with comparatively longer stipules, the larger 

 flowers, and longer and more spreading awns. 



luESiNE LAXA. Herbaceous, tall (3 to 5 feet high) and slender, 

 toraentose : leaves lanceolate, acuminate, rounded or slightly cuneate 

 at base, shortly petiolate, densely tomentose beneath, greener and 

 finely pubescent above, 3 to 5 inches long, those upon the very slender 

 and lax flowering branches very narrowly lanceolate and more atten- 

 uate at base, an inch or two long : heads of flowers small, alternate 

 and mostly pedunculate along the opposite branchlets of the diffuse 

 panicle, only the uppermost nearly sessile : bracts villous-pubescent, 

 equalling the densely long-silky perianth ; staminate flowers unknown. 

 — In shaded places in the Jimulco Mountains, Coahuila ; C. G. Prin- 

 gle (n. 141), April, 1885. 



Eriogonuji Jonesii. Of the Corymhosa group, a woody-based 

 branched tomentose perennial, 2| feet high or less : leaves alternate, 

 ovate, white-tomentose beneath, greener above, the blade ^ to 1^ inches 

 long, shorter than the petiole : bracts subtending the open dichotomous 

 corymb, somewhat foliaceous : involucre mostly sessile and solitary, 

 tomentose, scarcely a line long : flowers a line long, slightly exserted, 

 glabrous, white or pinkish, the inner sepals oblong, the outer obovate 

 and emarginate. — Collected at Cosnino, Arizona, a station on the 



