38 



our conclusions given in Botanical Gazette, xiii. S(i, and we fin:l the plant 

 to have been discovered by Hoircll in 1882 and Suksdorf in 18h;{ at the 

 base of Mt. Adams, Washington Territory; also by Henderfion (382) in 1884 

 along Hood River, Oregon, where it was also collected by Hoivell in 188G. 

 In all these collections the plant was distributed as A. genuflexa. A fruit- 

 ing head of this species, collected by Twecdij in the Cascade Mts., Wash. 

 Torr,, is mixed with the distribution of his A. qennfit.vd, 280. 



(3. A. Hendersoni C. & R. Bot. Gazette, xiii. 80. Very 

 stout, densely tomeutose throughout, especially the inflorescence 

 and whitened lower surfaces of the leaves: leaves quinate then 

 pinnate; leaflets thick, broadly ovate, 3 to 4 inches long, 2 to 8 

 inches broad, obtuse, serrate: umbel equally many-rayed, with no 

 involucre, and involucels of numerous linear-acuminate bractlets; 

 rays 1 to 2 inches long; pedicels a line or less long: fruit oblong, 

 more or less pubescent, 8 lines long; dorsal and intermediate ribs 

 prominent; lateral wings thick and corky, as broad as body: oil- 

 tubes 2 on the commissural side: seed deeply sulcate beneath the 

 oil tubes, with plane face. 



Bluffs moistened by sea spray, Ilwaco (Long Beach), Washington Ter- 

 ritory, August "i, 1885 (Henderson 2158). Probably near San Francisco 

 (Kellogg in 186(5), but only in flower. 



7, A. Dawsoni Watson, Proc, Am. Acad. xx. 809. Gla- 

 brous or nearly so, rather slender, 1 to 8 feet high, with simple 

 stem: radical leaves biternate; leaflets lanceolate, 1 to 2 inches 

 long, sharply and finely serrate, acute or acuminate, terminal one 

 sometimes deeply 8-cleft; cauline leaves (1 or 2 or none) similar: 

 umbel solitary, conspicuously involucrate with numerous foli- 

 aceous lacerately toothed bracts nearly equalling the rays, invo- 

 lucels similar; rays about an inch long or less: fruit glabrous, 2^ 

 lines long. 



In the Rocky Mts. near the British boundary, at 0,500 feet altitude 

 (Lyall, in 18()1); and on the slopes of N. Kootenai Pass {Dawson 2155, in 

 1883). Fl. July. 



This species has not been collected with mature fruit, but in the t/pe 

 specimens the immature fruit indicates that the dorsal, and intermediate 

 ribs may become more or less winged. In this case, the species, with dor- 

 sal wings and large involucels, is more like Selinum than Angelica, in 

 which genus the discovery of mature fruit may place it. 



* * Oil-tubes in pairs in so/nc of the intervals: zvestern 

 species (excepting A. Ctirtisii), 



