64 LEAFLETS. 



tulose pubescence : leaves oval to ovate-oblong, 1 to 3 incheg 

 long, firm, strongly veined, sharply serrulate, mostly acute, the 

 upper face only obscurely puberulent and of a deep green: 

 umbels of immature fruit on peduncles exceeding the half -inch- 

 long petioles. 



On Bear Mountain near Silver City, New Mexico, 17 June, 

 1903, 0. B. Metcalfe; also by the same near Mangas Springs, 

 in the same region. The species is not rare in the mountains 

 of the western part of New Mexico and adjacent Arizona. 



Ehamstus castokea. Shrub with rather flexible branches 

 and a subcoriaceous but deciduous foliage, both growing branch - 

 lets and lower face of leaves minutely and densely whitish- 

 tomentulose ; leaves mostly elliptical, 1 to 2 inches Inog, on stout 

 petioles and traversed by a prominent and very broad midvein 

 beneath, the margins obscurely and often remotely serrate, ber- 

 rieslarge, usually 3-seeded, the seed nearly orbicular. 



Beaver Creek, northern Arizona, Aug. 1883, H. H. Rusby, n. 

 550 of my set of Dr. Rusby's plants. The specimens have for 

 twenty years been allowed to pass for those of R. tomentella, 

 though the character by which it is distinguishable from that 

 exclusively Californian species are obvious. 



Ehamnus CUSPIDATA. Allied to the last two and to R. to- 

 mentella but smaller, the tomentose pubescence different, coarser, 

 looser and with longer and hirtellous hairs intermixed rather 

 copiously, especially along the veins : leaves i to 2 inches long, 

 oval to elliptical, abruptly and often cuspidately acute, sharply 

 saliently and closely serrulate, those of vigorous shoots with 

 even some coarse serratures below the cuspidate apex : flowers 

 very copious, in dense cymes from all the axils, 5-merous, the 

 triangular calyx-teeth longer than the tube : fruit not seen, said 

 to be well flavored and edible. 



Foothills of the mouutains in Kern Co., California; the type 

 specimens from near Tehachapi, by the writer, 23 June, 1889. 



Rhamnus OBT0SISSIMA. Deciduous shrub with short rigid 

 densely leafy and finely puberulent branchlets, these dark red- 

 purple the first season, afterwards grayish and glabrate : leaves 

 small, I to li inches long on very short and slender petioles, of a 

 light green on both faces, thin, glabrous above, puberulent on 



