17-1 Nelson Xcir limit* from X< j r<i<l<t. 



much broader leaves which would ally it rather with Z. lat (folia. From 

 both of these species it differs in its included stamens and its loose silvery 

 pubescence. The only specimens I have are from Nevada, No. 278 by 

 Kennedy and Doten, and No. 896 (type) by Kennedy, from Broncho Creek, 

 Washoe Co., August 17, 1904. 



Rhamnus Nevadensis sp. nov. 



Leaves herbaceous, the young leaves thinly so (not at all coriaceous), 

 elliptic-oblong, mostly obtuse, minutely crenate-serrate, glabrous except for 

 a slight puberulence on the conspicuous midrib and veins beneath, 3-5 cm. 

 long, on relatively short slender petioles ; flowers subumbellate ; calyx 

 small, its lobes broadly deltoid-triangular, shorter than the tube; petals 

 minute, nearly aborted, broadly obreniform not more than 1 mm. broad, 

 considerably shorter, the apical notch very evident ; filament so short that 

 the anther is partly enclosed by the minute petal ; fruit when mature about 

 1 cm. in diameter, subspherical (slightly bilobed), black ; seeds 2, hemi 

 spherical but somewhat narrowed at base. 



This is a close ally of R. Californicus Esch. From that, however, it dif 

 fers very essentially in its non-coriaceous leaves, its short calyx-lobes, its 

 minute petals which are broader than long, its very short stamens, and its 

 seeds which are narrowed at base. The complete and accurate description 

 of R. Californicus by Dr. Greene in Fl. Fran., 80, serves to nicely bring out 

 the distinctions between that species and $ Nevadensis. I base the species 

 upon two collections ; flowering specimens by M. E. Jones, near Reno, 

 June 11, 1897 ; fruiting specimens by P. B. Kennedy, No. 953, Verdi, Sep 

 tember 29, 1904. 



Polemonium montrosensis sp. nov. 



Root woody, surmounted by a short branched caudex from which spring 

 a few short (8-15 cm. long) stems and several-many much shorter leaves ; 

 minutely glandular-puberulent throughout but green and glabrous to the 

 naked eye ; leaflets crowded but distinct, 6-12 pairs, broadly ovate, obovate 

 or orbicular, thin and delicately reticulate-veined, rounded-obtuse or some 

 times on the same plant subacute ; inflorescence cymulose; calyx campan- 

 ulate; its lobes ovate, about 3 mm. long, equalling the tube; corolla pale 

 blue, cam panulate-funnel form ; its tube not surpassing the calyx; its lobes 

 suborbicular, entire, as long as the tube; stamens about equalling the corolla 

 lobes ; the filaments slender, not dilated, minutely pubescent on the line 

 of insertion only. 



Allied to P. flegans Greene (Pitt. 3 : 305), but of somewhat different habit 

 and its corolla-tube not yellow. That species besides is extremely viscid, 

 even more so than its near relative 1 viscosum. In fact P. montrosensis 

 has but little in common with P. elegans, P. viscosum, and P. confertum 

 except leaf- character. In habit and inflorescence it is rather allied to P. 

 pulchdlum, which name indeed the type specimens bore. No collections 

 are at hand except the following : J. E. Church, June, 97 ; and S. B. Doten, 



