OP ARTS AND SCIENCES. 453 



Apium (Ammoselinum) Butleri, Engelm. in herb. A low gla- 

 brous annual, branching from the base : leaves ternate-quinate, the 

 short segments narrowly oblong : umbels sessile opposite to the leaves, 

 the rays and pedicels very short (2 or 3 lines or less) ; involucels of 1 to 

 3 narrow bracts : petals entire, concave : fruit ovate, acute, a line long, 

 strongly ribbed, the ribs acute and smooth or slightly scabrous, and the 

 lateral ribs continuous over the commissure as a thin corky margin ; 

 seed semiterete, slightly concave on the face and somewhat channelled 

 beneath the solitary vitta? of the intervals. — Texas, in wet grounds 

 near Houston, E. Hall (n. 244), March, 1872, and near Dallas, J. 

 Reverchon, March and April, 1874; Indian Territory, south of the 

 Arkansas, G. D. Butler, 1876. It has been distributed as Apium 

 Popei both in Hall's Texan collection and in the sets of A. H. Curtiss, 

 but differs in the nearly sessile umbels and in the much smaller and 

 smoother fruit, the corky commissural margin of which is much less 

 developed. 



Ferula purpurea. Nearly acaulescent, the 2 or 3 stout stems 

 (about a foot high) from a thick root : leaves few, glabrous, large and 

 very much dissected, the ultimate segments linear and often short : 

 rays 8 to 20, becoming 3 or 4 inches long ; involucels of several linear 

 acuminate bracts : flowers purple : fruit elliptical, 9 to 12 lines long by 

 5 wide, about equalling the pedicels, with a thick corky margin and 

 numerous vittje. — On rocky hillsides near the lower Columbia River ; 

 in Klickitat County and the Simcoe Mountains, Washington Territory, 

 collected by W. N. Suksdorf and the Howell Brothers, and at Hood 

 River in Oregon by Mrs. P. G. Barrett. 



Peucedanum Cous. Acaulescent, from a nearly globose tuber 

 (I to 1 inch in diameter), glabrous or very slightly puberulent : leaves 

 quinate-pinnate, the leaflets 3-5-parted or -cleft or sometimes entire, 

 the segments linear-oblong (2 to 4 lines long) : scapes exceeding the 

 leaves (3 to 6 inches high), roughish ; rays unequal (2 inches long in 

 fruit, or less); involucels of about 12 short oblong-ovate scariously 

 margined bracts : flowers yellow : fruit nearly sessile, somewhat puber- 

 ulent, oblong to rather broadly elliptical, strongly ribbed, 3 or 4 lines 

 long ; vitta; filling the broad intervals. — Eastern Oregon ; collected 

 in John Day's Valley by Thomas Howell (n. 270), May, 1880, and at 

 Antelope (n. 418), and by W. C. Cusick (n. 358) in Union County. 

 The plants are known to the Indians as " Cous," and the roots collected 

 for food. 



Peucedanum Cusickii. Dwarf, caulescent (apparently from a 

 branching rootstock) , glabrous : leaves once or twice ternate, the seg- 



