37 
with neither involucre nor ,involucels; rays ^ to 4 inches long ; 
fruiting pedicels thick, a line or less long (rarely 2 or 3 lines): fruit 
oblong to obovate, glabrous, 2 to 3 lines long; dorsal and inter- 
mediate ribs as in the last, but even less prominent; lateral wings 
as bi'oad as body or broader: oil-tubes 2 on the commissural side 
(distant): seed-face broadly concave. (Fig. 9.) 
In the mountains near the British boundary, Washington Territory 
(Lyall, Suksdorf Henderson 383, Brandegee 796), Idaho (Leiberg),. 
and Montana ( Wahsoa 157, Canhy 146, Scribner 65); also summit of S. 
Kootenai Pass, B. 0. (Dawson), and Oregon (Nevius) 
4. A. tomentosa Watson, Proc. Am. Acad. xi. 141. Stout, 
hoary-tomentose throughout with rather fine tonientum, or the 
stem glabrous: leaves quinate then once or twice pinnate ; leaflets 
thickish, ovate, acute, oblique at base, 2 to 4 inches long, unequally 
and sharply serrate or toothed: umbel somewhat equally many- 
rayed, with neither involucre nor involucels : rays 1 to 4 inches long ; 
pedicels 4 to 6 lines long: fruit oblong-elliptical, glabrous or 
nearly so, 3 to 4 lines long, 2 to 2q4 lines broad; dorsal and inter- 
mediate ribs small and acutish ; lateral wings thin, about as broad 
as body: oil-tubes 2 on the commissural side: seed somewhat sili- 
cate beneath the oil-tubes, with plane face. 
In the Coast Ranges, from Mendocino county, California, to the San 
Bernardino Mts. (Parish 988). FI. August. 
5. A. arguta Nutt. Ton- & Gray, FI. i. 620. Glabrous, 
except the sometimes minutely puberulent inflorescence, stout, 2 to 
4 feet high: leaves ternate then pinnate or bipinnate; leaflets mostly 
small, ovate to lanceolate, rather acute, serrate: umbel rather 
equally many-rayed, with neither involucre nor involucels; rays 
1 to 3 inches long; pedicels 3 to 5 lines long: fruit oblong- 
elliptical, glabrous, 3 to 4 lines long; dorsal and intermed- 
iate ribs thick and slightly elevated; lateral wings very corky, 
thick, and as broad as the much flattened body or broader: oil- 
tubes 2 on the commissural side (distant, or sometimes 4 in 2 dis- 
tant pairs): seed sulcate beneath the oil-tubes, with plane face. 
(Fig. 10.) 
Oregon and Washington Territory, 
This plant was reported by Nuttall from “Fort Vancouver, Oregon,” 
and then lost sight of, being confused with A. genuflexa. An examination 
of the type (in good fruit in the Torrey Herbarium) abundantly confirms 
