248 UMBELLIFER.E. angelica. 



SELLNUM. 



A, Lyallii Watson Proc. Am. Acad, xvii, 374. Stout, 4-5 feet high, 

 glabrous; leaves once or twice ternate then quinate, the uppermost re- 

 duced to large inflated petioles; leaflets ovate to lanceolate, acute or acutish, 

 unequally dentate ; umbel unequally many-rayed with neither involucre 

 nor involucels : rays 3^-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 

 broadly concave. In the mountains, Oregon to Brit. Columbia, Montana 

 and Idaho. 



A. arguta Nutt. 1. 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: 

 umbel 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. Henderson! 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 thicis, 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 



* * Oil-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 puherulent inflorescence : leaves bipinnate : leaflets lanceo- 

 late to ovate-lanceolate 1-2 inches long acute or acuminate, laciniately 

 toothed : umbel rather equally 10-20-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, 4 on 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. capitellatmn 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 



