268 UMBELLIFEKvE. sicm. 



CABDM. 



eels about a line long, calyx-lobes prominent: fruit (immature) oblong,, 

 glabrous : oil-tubes several in the intervals. In the Siskiyou tnountams at : 

 high elevations, southwest of Ashland, Oregon. ' ^ 



30 SIUM L. Gen. n. 348. 

 Smooth perennials, groyning in water or wet places, with' 

 pinnate leaves, serrate or pinnatifid leaflets, involucre and in- ■ 

 volucelsof numerous narrow bracts, and numerous white flowers. 

 Calyx-lobes minute. Fruit ovate to oblong, glabrous. _ Carpels 

 with prominent corky nearly equal ribs. Stylopodium de- 

 pressed. Style short. Oil-tubes 1-3 in the intervals, 2-6 on the ■ 

 commissure. Seed subangular with plane face. 



S. cicntsefolinm Gmelin. Syst. ii, 4S2. Stout, 2-6 feet high : leaflets ■ 

 3-8 pairs, linear to lanceolate, shai-ply serrate; mostly acuminate, 2-5 ■ 

 inches long, submerged leaves when present finely disseicted: umbel 

 manv-rayed ; rays 12-18 lines long ; pedicels 1-3 lines long : oil-tubes 2-6- 

 on the commissure. Apparently throughout North America. 



31 ZIZIA Koch Umbel. 129. 



Smooth perennial herbs with mostly simple or ternate leaves, . 

 no involucre, involucels of small bractlets and yellow flowers: the 

 central fruit of each umbellet sessile, calyx-teeth prominent. 

 Fruit oblong, glabrous. Stylopodium wanting. Styles long. 

 Oil-tubes large and solitary in the broad intervals, 20 on the • 

 commissure and a small one in each rib. Seed terete, sulcate. 



Z. cordata Koch 1. c. Radical leaves mostly long-peticled, cordate or - 

 even rounder, crenately toothed, very rarely lobed or divided; stem leaves 

 simply ternate or quinate, the leaflets ovate to lanceolate, serrate incised, 

 or even parted : fruit ovate. Throughout Canada and the Atlantic States • 

 and Oregon. 



32 CARUM Linn. 



Smooth erect slender herbs with tuberous or fusiform fascicled i 

 rootsi pinnate leaves with few linear leaflets, involucre and in- 

 volucels of few to many bracts and white flowers. Calyx-lobes- 

 small. Fruit ovate or oblong, glabrous, carpel with filiform or.: 

 inconspicuous ribs. Oil-tubes 2-6 on the commissure. Seed 

 dorsally flattened, more or less sulcate beneath the oil-tubes. 



C. Gairdnerl Gray Proc. Am. Acad, vii, 344. Stems 1-4 feet high, - 

 from fascicled-tuberous or fusiform roots : leaves few usually simply pin- 

 nate, with 3-7 linear leaflets 2-6 inches long; upper leaves usually simple: ■ 

 umbels 6-15-rayed with involucre of several bracts or none and involucels 

 of linear acuminate bractlets : rays about 18 lines long : fruit ovate, small, 

 with long styles : seed terete. From . Brit. Columbia and Montana to • 

 Utah and California. 



C. Oregana Watson Proc. Am. Acad, xx, 368. "Closely resembling 

 the preceding, but the lower leaves more divided, with shorter linear lobes; ; 

 fruit oblong, larger with lope styles : seed flattened dorsally, sulcate be- 

 neath the oil-tubes and slightly concave on the face, with central longitudi-r 

 nal ridge." Brit. Columbia to California and Nevada. 



