248 UMBELLIFER&. ANGELICA. 
SELINUM. 
‘A. Lyallii Watson Proc. Am. Acad. xvii, 374. Stout, 4-5 feet high, 
“ae toe leaves once vr twice ternate then quinate, the uppermost re- 
uced to large inflated petioles; leaflets ovate to lanceolate, acute or acutish, 
unequally dentate; umbel unequally many-rayed with neither involucre 
nor involucels: rays 44-4 inches long; fruiting pedicels thick, a line or 
less long: fruit oblong to obovate, glabrous 2-3 lines long; lateral wings as 
broad or broader than the body, oil-tubes 2 on the commissure: seed-face 
eed an on In the mountains, Uregon to Brit. Columbia, Montana 
an aho. 
A. arguta Nutt. 1l.c. Stout 2-4 feet high, glabrous or the inflores- 
cence sometimes minutely’ puberulent: leaves: ternate ‘then pinnate or 
bipinnate ; leaflets mostly small, ovate to lanceolate, rather acute, serrate: 
umel rather equally many-rayed with neither involucre nor involucels: 
rays 1-3 inches long; pedicels 3-5 lines long, fruit oblong-elliptical, glab- 
rous 3-4 lines long, dorsal and intermediate ribs thick and slightly elevat-' | 
ed; lateral wings very corky, thick and broad as the much flattened body 
or broader, oil-tubes 2 on the commissure (sometimes 4 in 2 distinct pairs) : 
seed sulcate beneath the oil-tubes with plane face. Along high mountain 
streams, Oregon and Washington. 
A. Hendersoni C: & R. Bot. Gaz. xiii, 80. Very stout densely tomen- 
tose throughout, especially the inflorescence and whitened lower surface of 
the leaves: leaves quinate then pinnate; leaflets thick, broadly ovate, 2-4 
inches long by 2-3 broad, obtuse, serrate: umbel equally many rayed with 
no involucre and involucels of numerous linear-acuminate bractlets: rays 
1-2 inches long: pedicels a line or less long: fruit oblong more or less pu- 
bescent, 3 lines long: dorsal and intermediate ribs prominent; lateral wings 
thick and corky, as broad as the ! ody: oil-tubes 2 on the commissure, seed 
deeply sulcate beneath the oil-tubes, with plane face. Bluffs moistened by 
the sea spray Washington and Oregon 
* * Qjil-tubes in pairs in some of the intervals. 
A. Canbyi C. & R. Rev. Umb. 40. Rather stout, 2-3 feet high, gla- 
brous except the put:erulent inflorescence : leaves bipinnate: leaflets lanceo- 
late to ovate-lanceolate 1-2 inches long acute or acuminate, laciniately 
toothed: umbel rather equally 1!0-20-rayed, with neither involucre nor 
involucels; rays 1-2 inches long: pedicels slender 3-4 lines long: flowers 
pinkish: stylopodium conical: fruit oblong, glabrous at maturity; dorsal 
and intermediate ribs thin and very prominent somewhat winged: lateral 
wings rather thin half as broad as the body; oil-tubes solitary in the dorsal. 
intervals in pairs in the lateral ones, 4on the commissure; seed-face plane. 
Eastern Washington to Southern Oregon. 
5 SELINUM L. Gen. n. 337. 
Tall stout branching perennials with pinnately decompound 
leaves, few-leaved involucre, involucels of numerous bractlets 
and white flowers. Calyx-lobes obsolete. Fruit oblong to obo- 
vate with more or less prominent disk. Carpels with prominent 
winged ribs, the laterals usually broader.Oi 1-tubes conspicuous, 
2-4 on the commissure. Seed sulcate beneath the oil-tubes, with 
plane face. | 
S. eapitellatum Watson, Bot. King, 126. Very stout, 1-5 feet high, 
smooth except the tomentose infloresence; leaves large with much dilated 
petioles bipinnate, the few leaflets oblong to linear-lanceolate, an inch or 
two long, coarsely laciniately toothed or lobed: umbel equally 6-12 rayed, 
with globose umbellets of sessile pubescent flowers having involucels of a 
