150 UMBELLIFEEa;. 



7. S. saxatilis, Greene. Stems many, depressed, 1 ft. long, from a 

 fleshy napiform root: leaves ternately pinnate, the ultimate segments 

 broad, coarsely toothed: branches repeatedly dichotomous, with pedi- 

 cellate heads in all the forks: small involucels of very unequal foliaceous 

 entire or toothed bractlets: fr. strongly tuberculate, the tubercles of the 

 upper part ending in a broadly subulate incurved point. — Summit of Mt. 

 Diablo, growing among loose rocks. 



8. S . tuberosa, Torr. Very slender, the solitary erect freely branch- 

 ing stem 6 — 18 in. high, from a small roundish not deeply seated 

 tuberous root: leaves small, finely twice or thrice pinnate, the ultimate 

 segments small: umbels 1 — 4-rayed, small: fl. yellow, the sterile ones 

 long pedicelled: fr. broader than long, tuberculate. — Rocky hills, in sterile 

 clayey soil. March — May. 



5. VELJ5A, De Candolle. Glabrous or pubescent. Boots thick, 

 elongated, yellow, fragrant. Leaves mostly radical, pinnately or ternately 

 compound. Involucre sometimes wanting. Involucels conspicuous. 

 Flowers yellow. Fruit somewhat flattened laterally, with prominent 

 equal filiform ribs, and thin pericarp. Oil-tubes conspicuous, 3 — 6 in 

 the intervals, 4 — 10 on the commissural side. 



1. V. Hartwegi (Gray), O. & R. Subacaulescent, light green, the 

 petioles and veins somevihat scabrous: leaves biternate and quinate; 

 leaflets obovate or oval-oblong, 1 — 2 in. long, mostly confluent, coarsely 

 and deeply mucronate-serrate: peduncles 1 — 2 ft. high; umbel 16—20- 

 rayed, usually without involucre, but the umbellets subtended by 

 linear-oblong reflexed bractlets; rays 1% — ^ in- long; pedicels short: fr. 

 nearly orbicular, smooth, 3 — 4 lines long, 1% — 3 lines broad, sharply 

 ribbed. Near San Francisco. 



2 V. Kelloggii (Gray), 0. & E. More slender than the last, mostly 

 puberulent: leaves triternate; leaflets ovate, % — % in. long; usually 

 3-lobed: umbel 8 — 16-rayed, mostly without involucre, the involucels of 

 small linear bractlets; rays 1 — 3 in. long: fr. 1—2 lines long, nearly as 

 broad, retuse at base, the ribs filiform. — Hills of the Coast Range, in 

 wooded or open ground. 



6. CONIUM, Linn. (Poison Hemlock). Tall glabrous biennial, with 

 large ternately-dissected thin leaves, and compound umbels of small 

 white flowers terminating the paniculate branches. Calyx-teeth obsolete. 

 Fruit broadly ovate, laterally compressed; carpels with 5 prominent 

 obtuse often undulate or crenulate ribs, and no oil-tubes. 



1. C. maculatum, L. Root fusiform: stem stout, fistulous, 3 — 7 ft. 

 high, glaucescent, spotted with purple: leaves a foot long or more, 

 two-thirds as broad: segments % in. long, pinnatifid, the lobes acute: 

 umbels 12— 20-rayed: rays 1—1*4 i n - long: fr. 1% lines long, shorter 

 than the pedicels. — Waste grounds, in shady places. 



