. SEUNUif. . XJMBELLIFR^. 249 



HEBACLEUM. 



few deciduous bractlets : rays 1-2 inches long.: fruit sessi]'e and dilated ; re- 

 ceptacle, hirsute,, ouneate-obovate, 3 lilies long: lateral wings broader than 

 the dorsal and intermediate ones. Along stream banks eastern Oregon to 

 Nevada and California. 



S. Kingii Watson, Bot. King, 126'. Smooth, 1-2 feet high rlower leaves 

 bipinnate the upper nearly simply pinnate with dilated petioles; leaflets 

 ovate or linear lanceolate, 1-3 inches long, coarsely and unequally serrate^ 

 umbel 5-10 rayed, with no irivolucela ^ pwiicels 2-8 lines long, fruit broadly 

 Ovate, hispid, 2-3 lines long ; lateral wings broader than the narrow dorsal 

 and intermediate ones. Aquatic in mountain swamps Eastern Washington 

 to Nevada and California. 



S. Dawsoni C. & R. Bot. Gaz., xiii, 144. A foot or so high glabrous : 

 leaves ternate then pinnate, the small ovate acute segments laciniately 

 toothed to entire : umbel with involucels of linear-oblong scarious bractlets 

 longer than the pedicels and abruptly ending in a longer attenuation : ped- 

 icels 1-2. lines long, fruit oblong, smooth about 2 lines long, with .promi- 

 nent wings, the lateral ones but little broader. At Pelly Banks Yukon 

 river, lat, 61 deg., perhaps Northern Washington. 



S. Benthsuni Watson. Bibl. Ind. 432. Glabrous throughout: leaves 

 ternate then pinnate the oblong to linear-oblong acute segments 6-9 lines 

 long, laciniately toothed or lobed to entire; umbels on stout peduncles, 

 10-15 rayed, with an, involucre of a few linear setaceous bracts, and 

 involucels of ■ several ■ elongated linear entire bractlets equalling 

 the flowers or longer ; , rays about an inch long ; pedicels 2-3 lines 

 long: fruit ovate, 2- lines long, often with a single prominent 

 calyx -tooth. Arctic shores and mountains to Queen Charlotte Islands, 

 perhaps Northern Washington. 



S. Hookeri Watson C. & R. Rev. Umb. 45. Conioselinum Fisheri of 

 Anthers in part. Stout, 2-3 feet high, gla' rous except the somewhat pu- 

 berulent inflorescence : leaves large with much dilated petioles bipinnatifid, 

 the narrowly ovate to linear-oblong acute segments an inch or less long, 

 laciniately toothed or lobed to entire : umbel 10-25 rayed, with involucre of 

 few deciduous linear-setaceous bracts, and involuicels of narrowly linear 

 more or less, elongated bractlets; rays about an inch long; pedicels 2-3f 

 lines long: fruit oblong, glabrous, 2-3 lines long, with prominent but 

 scarcely winged dorsal and intermediate ribs and rather ' broadly winged 

 thickish lateral ribs. Ocean bluff mouth of the Columbia to Alaska. 



6 HERAOLEUM L. Gen. n. 345. 



Tall stout perennial herbs ,with large ternately compound 

 leaves, deciduous involucres, involucels of numerous bractlets 

 and large many-rayed umbels of white flowers with obcordate 

 petals. Calyx-lobes small or obsolete. Fruit broadly ovate, 

 very much flattene.l, somewhat pubescent. Carpel with dorsal 

 and intermediate ribs filiform ; the broad lateral wings con- 

 tiguous to those of the other carpel, strongly nerved towards the 

 outer margin. Stylopodium thick conical. Gil-tubes about 

 half as long as .the carpel 2-4 . on the commissure. Seed very 

 much flatteried dorsally. 



H. lanatum Michx Fl, i, 166. Yery stoqt, .478. fe;?t high,, pubescent 

 or woolly above : petioles much dilated; leaflets petiolmlate round-cordate 

 4-10 inches broad irregularly cut-toothed : rays 2-6 inches long : fruit 4-S 

 lines long, somewtat pubescent. W^t grounds, Alaska toCalifornia and 

 across the continent. 



