OF ARTS AND SCIENCES. 371 



nardino Mountains ("W". G. Wright and S. B. Parish), and Mohave 

 Desert (Mrs. K. Curran). The original locality is uncertain. E. hirti- 

 Jlorum is more northern, ranging from Tuolumne to Lake and Colusa 

 Counties. This species was at first upon a young and very insuflicient 

 specimen referred to Oxytheca, which genus appears to be clearly sep- 

 arated from Eriogomim only by the awned lobes of the involucre. 



Ekiogonum (Oregonium) giganteum. Of the Cojymbosa section: 

 a stout and tall shrubby perennial, bearing its leaves at the ends of the 

 branches, which are tomentose or glabrate : leaves oblong, truncate or 

 subcuneate at base, obtuse, 2 to 4 inches long including the stout • 

 petiole, pinnately nerved, densely tomentose, white and leticulately 

 veined beneath, greener above : peduncle stout, bearing a broad dense 

 dichotomously branched tomentose cyme, the foliaceous bracts lan- 

 ceolate to linear : involucres sessile (the alar pedicellate), narrowly 

 campanulate, densely tomentose, nearly a line long, cleft to the middle, 

 the teeth lanceolate and acute ; flowers small, tomentose, whitish, the 

 oblong lobes green-nerved. — Found on the northwest coast of Santa 

 Catalina Island, California, on rocky bluffs overhanging the sea, by 

 W. S. Lyon, July, 188-1. It is described as from 5 to 10 feet high 

 and as much in diameter, the main stem sometimes 4 or 5 inches in 

 thickness a foot above the ground, with thin fibrous bark and the 

 cymes often 18 inches broad. It is allied to E. corymhosum, and espe- 

 cially to E. arhorescens, Greene, which has linear sessile leaves and a 

 broader involucre with broader and shorter teeth. 



Eriogoxum (Oregonium) Orccttianum. Of the E. Jleermanni 

 group : the very short herbaceous leafy stems from a woody base, and 

 the rigid divaricate branches finely subtomentose-pubescent : leaves 

 scattered, thick, nearly glabrous, broadly ovate or obovate, obtuse, 

 shortly petiolate, 3 to 8 lines long; bracts ternate, deltoid-subulate, 

 small, subherbaceous : involucres solitary, turbinate-campanulate, sub- 

 tomentose, nearly a line long : flowers tomentose, greenish white, | of 

 a line long, the oblong-obovate lobes of the perianth nearly equal. — In 

 the Camillas Mountains (•' Tantillas " of Palmer), Low-er California; 

 collected by C. R. Orcutt, August, 1883: the specimens scarcely 6 

 inches high. 



Eriogonum (Oregonium) foliosum. Of the E.vimineum group: 

 annual, branching from the base, floccose-tomentose, the branches 

 sparse and spi-eading : leaves ovate, cordate or cuneate at base, obtuse 

 or acute, undulate, tomentose beneath, 3 to 9 lines long besides the 

 petiole, radical, and in the axils of the subulate bracts: involucres 

 broadly turbinate, cleft nearly to the middle, green, a line long: flowers 



