38 
our conclusions given in Botanical Gazette, xiii. 80, and we find the plant 
to have been discovered by Howell in 1882 and Suksdorf in 1883 at the 
base of Mt. Adams, Washington Territory; also by Henderson (382) in 1884 
along Hood River, Oregon, where it was also collected by Howell in 1880. 
In all these collections the plant was distributed as A. genuflexa. A fruit- 
ing head of this species, collected by Tweedy in the Cascade Mts., Wash. 
Terr,, is mixed with the distribution of his A, genuflexa, 280. 
6. 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 3 
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, 3 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 sulcafe beneath the 
oil tubes, with plane face. 
y 
Bluffs moistened by sea spray, Ilwaeo (Long Beach), Washington Ter- 
ritory, August 5, 1885 {Henderson 2158). Probably near San Francisco 
{Kellogg in 1866), but only in flower. 
7. A. Dawsoni Watson, Proc, Am, Acad. xx. 369. Gla- 
brous or nearly so, rather slender, 1 to 3 feet high, with simple 
stem: radical leaves biteimate; leaflets lanceolate, 1 to 2 inches 
long, sharply and finely serrate, acute or acuminate, terminal one 
sometimes deeply 3-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 6,500 feet altitude 
{Lyall, in 1861); and on the slopes of N. Kootenai Pass {Dawson 2155, in 
1883). FI. July. 
This species has not been collected with mature fruit, but in the type 
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 some of the intervals : western 
species (excepting A, Curtisii). 
