Ertngium. UMBELLIFERyE. 603 



5. jS. hipinnalifida (Dougl.) : leaves bi])innatifirl ; the lower cauline ones 

 opposite, on loii^ petioles ; segments remote, iiirisely serrate, (Iccurreiil on 

 the acutely toothed rachis; peduncles elonijated ; umbels compound and 

 soniewliat" proliferous; umbellets uiany-flowered ; iuvoluccls very short. — 

 Hook. ! Jl. Bur.- Am. 1. p. 358, t. 9-2. 



Oregon, Dr. Scouler, Nultall ! Mr. Tolmie ! June. — About a foot high. 

 Leaves mostly radical, or springing from an elevated caudex, 3-4 inches 

 long : segments narrowed at tlie base ; the rachis winged and consjjicuously 

 dentate with mucronate salient teeth. Umbellets in very compact lieads. 

 Flowers all nearly sessile, purple. 



6. 5?. hipinnata (Hook. & Arn.) : stem slender; leaves bipinnately part- 

 ed ; divisions remote ; the segments oblong, cuneate at the base, incisely and 

 mucronately toothed ; involucral leaves deeply 3-cleft; the segments narrow, 

 toothed or laciniate ; calyx-tube echinate above the middle, naked towards 

 the base. — Hook. S^-Arn. ! hot. Bcechey, svppl. p. 347. 



California, Dou'-las ! — Stem a foot or more in height, much more slender 

 than in any other North American species. Segments of the leaves about 

 half an inch long, very acute. Umbellets about 3 lines in diameter, 6-6- 

 flowered ; the sterile flowers pedicellate. — S. graveolens of Chili is allied to 

 this species ; but differs in the obtuse segments of the leaves, much larger 

 heads of flowers, &c. 



7. .S. arctopoides (Hook. & Am.) : stems very short, with several scapiform 

 branches ; leaves deeply 3-parted ; the divisions pinnatifid or bipinnatifid ; 

 segments narrow and si)reading ; peduncles elongated; involucels 8-10- 

 leaved, longer than the umbellets ; calyx-tube naked towards the. base. — 

 Hook. S^- Aim. ! hot. Beechcy, p. 14-2, 8^- sujypl. p. 347 ; Hook. jl. Bor.-Am. 

 1. p. 258, t. 91. 



Grassy plains near Monterey, Cahfornia, Douglas! NuttaU .' North 

 West Coast, Menzics. March-April.— Plant 6-10 inches high. Leaves 

 usually much dissected, with widely spreading lobes. Umbels simple. 

 Leaflets of the involucel linear-lanceolate, spreading or reflexed. Sterile 

 flowers numerous, pedicellate. Fruit armed with a few strong hooked 

 prickles above the middle. — A remarkable species, with the habit of Arctopus 

 Capensis. 



5. ERYNGIUM. Tourn. ; Lam. ill. t. 187 ; Laroche, hist. Eryng. 1808. 



Flowers, sessile, collected in dense globose or cyhndrical heads. Cal3rx- 

 tube roughened or papillose with scale-like vesicles ; the lobes somewhat 

 leafy. Petals connivent, oblong-obovate, emarginate, with a very long in- 

 flexed point. Styles fiUform. Fruit obovate, nearly terete, squamate or 

 tuberculate. Carpels semilerete, without vitta- or ribs. Carpophore adnate 

 throughout with the carpels.— Herbaceous or sometimes suffruticose plants ; 

 the leaves often prickly. Flowers mostly blue or white, bracteate; the 

 lower bracts mostly larger and involucrate ; the others intermixed with the 

 flowers and converted into paleaj or scales. 



1. E. diffusum (Torr.) : leaves all sessile and palmately parted ; segments 

 oblono-, incisely serrate and spinose ; stem dichotomously branched, diHuse ; 

 heads^subglobose, nearly sessile ; leaflets of the involucre 4-6, 3-cleft, a little 

 longer than the heads; scales lanceolate, entire.— Torr..' in ann. lye. JSew 

 York,2.p. 207; DC. prod r. 4. p. 91. , ., o 



On the Canadian River, Arkansas, Dr. James !— U Stem about a span 



