Deweija. UMBELLIFERiE. 9 ''7 



heads dense, 3 lines in diameter : flowers purple or sometimes yellowish ; iuvolucels 

 very short : fruit covered with hooked bristles. — Hook. Fl. i. 258, t 92 • Torrev 

 Bot. Wilkes Exp. 314. ' ' J-. 



From the Sacramento Valley to the Columbia ; Sierra Co., Lcmmon. 



* >!: Leaves tivice or thrice pinnate, the segments small and not decurrent : flowers 

 yellow : fruit sessile : erect, very slender, branching. 



6. S. bipinnata, Hook. & Arn. Root fusiform, slender : stems a foot high or 

 more : ultimate segments of the leaves 3 or 4 lines long, acutely toothed : umbels 

 about 3-rayed, with a leafy involucre ; heads small, two lines in diameter, witli a 

 small membranaceous 6 - 8-parted involucel : fruit tuberculate at base, armed above, 

 1| lines long. — Bot. Beechey, 347. 



From Monterey to the Upper Sacramento Valley. 



7. S. tuberosa, Torrey. Stem 3 inches to a foot high, from a small tuberous 

 root : leaves usually very finely divided, the segments less than a line in length : 

 rays 1 to 4 ; involucres leafy ; involucels small, of unequal lobed segments : heads 

 small, the sterile flowers on long pedicels : fruit few, depressed, strongly tuberculate, 

 unarmed. — Pacif. E. Eep. iv. 91. 



Dry hills, Mendocino County, to the Sacramento Valley. In the Sierra Nevada (Duffield's 

 Ranch, Bujdow, and Plumas County, Mrs. Avics) there is found a low form with less finely 

 divided leaves. 



5. DEWEYA, Torr. & Gray. 

 Calyx-teeth small or obsolete. Disk and stylopodium depressed or wanting. 

 Fruit oblong-ellii»tical or orbicular, compressed laterally ; ribs somewhat prominent, 

 and with 2 or 3 obscure secondary lines between each pair ; oil-tubes 2 to 3 in the 

 intervals, conspicuous. Seed terete, involute, often enclosing a central cavity. 

 Carpophore entire. — Smooth erect perennial herbs, 1 or 2 feet high ; leaves pin- 

 nate or bipinnate, mostly radical ; flowers yellow, in large umbels ; involucre none 

 or partial, the involucels 1 -sided. 



An exclusively Californian genus, distinguished from Conium by the conspicuous oil-tubes, 

 from Arracacia (to which it is referred by Benth. & Hook, in Gen. PI. i. 885) by the depressed 

 stylopodium and terete seed, and from both by the undivided carpophore and more involute 

 seed. 



1. D. arguta, Torr. & Gray. Leaves simply pinnate ; leaflets 7, ovate to oblong- 

 ovate, the lowest shortly petiolulate and often subcordate, 1 to IJ inches long, 

 finely and sharply serrate with mucronate teeth, the terminal one "often 3-lobed : 

 peduncle elongated: rays about 12, without involucre, 2 or 3 inches long: invo- 

 lucels of 2 or 3 linear acuminate entire or toothed l)racts : pedicels two lines long : 

 fruit oblong, three lines long, acutely ribbed, with rather broad commissure and 

 somewhat prominent erect calyx-teeth. — Fl. i. 641 ; Torr. Bot. Mex. Bound, t. 2G. 



Southern California, near the coast, from Santa Barbara to San Diego. In woods and on dry 

 hillsides, rarely collected : root large and fusiform. 



2. D. HartTvegi, Gray. Eather stout : leaves biternate and quinate, tlie l(>af- 

 lets more deeply lolled and less sharply tootlied than in the last : uml)els similar ; 

 involuci-e none or of 1 or 2 leaflets : fruit broader, 3 lines long ; calyx-teeth oliso- 

 lete ; ribs prominent, and oil-tubes marked by intervening ridges : S3ed involute, 

 enclosing a central cavity. — Proc. Am. Acad. vii. 342. 



Hills bordering the lower Sacramento [Hartweg) ; near San Francisco, Kellogg. 



3. D. Kelloggii, Gray. More slender, leafy at base : leaves 3-ternate, the leaf- 

 lets a half to an incli long, mostly 3-lobed, mucronately toothed : involucre none : 

 rays 10 to 12, an inch long or more; involucels of very small subulate bracts : 



