UMBELLIFER.E. ' 321 



ii. 10: C rirosa, var. Califurnica, C. & R. Rev. Umb. 130. Rhizome freely 

 branchiuc^, the branches '4 —1 ft. long, the older portion slender (fo in- 

 thick or more) with long internodes, upper end abruptly clavate-enlarged 

 and short -jointed: stem erect, 3—6 ft. high: lowest leaves bipinnate, the 

 upper simply pinnate; leaflets ovate-lanceolate: involucre nearly obso- 

 lete: seed sometimes with 2 oil-tubes in the intervals. — In eddies and 

 along the margins of swift-flowing mountain streams of the Coast Range 

 only, from near Santa Cruz to the Oakland Hills; the naked branching 

 claviform rhizomes conspicuous, growing among bowlders and barely 

 above water. 



9. (ENAXTHE, Ih'o.HCorides. Aquatic perennials, with glabrous 

 decompound leaves and involucrate umbels. Calyx-teeth rather promi- 

 nent, acute. Stylopodium short-conical; styles elongated in age. Fruit 

 oblong, not compressed, with broad commissure, rounded corky ribs, 

 and oil-tubes solitai-y in the narrow intervals. Seed compressed dorsally, 

 flat on the face. 



1. (E. Californica, Wats. Proc. Am. Acad. xi. 139 (1870); H. & A. Bot. 



Beech. 142 (1840), nnder He losciadium. Cicuta Californica, Greene, Pitt, 

 i. 271, not Gray. Rootstocks erect or ascending, 1 — 2 in. long, % in. 

 thick, solid: stem solitary, decumbent or procumbent, rooting at the 

 lower joints, erect above and with one or more umbelliferous branches : 

 leaves ternate and bipinnate (or tlie upper ones simply pinnate), the 

 pinnae nearly sessile: leaflets approximate, ovate, acutish, toothed, at 

 base often lobed, % — 1 in. long: umbels with few linear bracts or none: 

 fr. 1% lines long, oblong, obtuse at each end, tipped with the long 

 spreading styles; ribs and commissure very corky: seed usually angled; 

 oil-tubes at the angles. — Very common, forming dense masses covering 

 shallow pools, or stretches of muddy shore back of the salt marshes and 

 among the hills throughout the Bay region and northward. The rather 

 succulent herbage appears to be innocuous, and is said to be eaten by 

 cattle without causing poisoning. It is therefore an exception among 

 aquatic umbellifers. Apr. — Nov. 



10. APIUM, Bnmfels. Glabrous biennial, with pinnately or ternately 

 compound leaves, and nearly naked umbels of small whitish flowers. 

 Calyx-teeth obsolete. Stylopodium depressed or 0. Fruit ovate or 

 broader; the carpels straight, obtusely ribbed; oil- tubes solitary in the 

 intervals. Seed nearly terete. 



1. A. GEAVEOiiENs, Linn. Sp. PL i. 264 (1753). (Celeey). Biennial, 

 with fibrous roots: stem erect, 2 — 3 ft. high, branching freely: leaves 

 pinnate; leaflets in 1 or 2 pairs, cuneate-obovate or rhomboidal, sparingly 

 toothed, 1 — 2 in. long, those of the uppermost leaves 3 only, oblanceolate, 

 nearly entire: umbels sessile or short-peduncled; rays 6 — 12, slender, 1 in. 



