56 PENTANDRIA— DIGYNIA. Slum. 



1. S. latifolinm. Broad-leaved Water-parsnep. 

 Leaves pinnate; leaflets oblong-lanceolate, equally serrated. 



S. latifolium. Li/in. Sp. PZ. 361. Willd. v.\.\^Z\ . Fl. Br. 312. 

 Engl. Bot. V. 3. t. 204. Hook. Land. fuse. 2. <. 1 10. Scot. 90. 

 Fl. Dan. t. 240. Jacq. Austr. t. 66. Bauh. Pin. 154. 



S. n. 777. Hall. HL«t.v. I. 345. 



S. latifolium, foliis variis. Roii Syn. 211. 



S. majus latifolium. Ger. Em. 256. f. ; also aiig;ustifolium. ibid.f. 



S. varum. Camer.EpH. 20.5./. 



S. maximum latifolium. Bauh. Hist. v. 3. p. 2. 175. f. 



Sium. Riv. Pentap. Irr. t. 78. 



Corian drum latifolium. Craniz Austr. fasc. 3. \0\. Roth Oerm. 

 v.].]3\.v.2.p.l.349. 



In rivers, ditches and fens. 



Perennial. Jttiij, August. 



Root fleshy, with numerous long fibres, creeping. Stents from 3 

 to 6 feet high, erect, angular and deeply furrowed, leafy, hollow, 

 .smooth, very little branched. Leaves from 6 to 1 2 inches in 



- length, oblong, smooth, for the most part simply pinnate, with 

 about 5 or 6 pair of large, opposite, lanceolate, acute leaflets, 

 with an odd one, all copiously, sharply and regularly serrated j 

 those leaflets only which grow under water being often doubly 

 pinnatifid, with very narrow segments. Footstalks of the 

 lower leaves long, cylindrical, hollow, and striated j the rest 

 very short ; all clasping the stem with a dilated membranous 

 margin. Umbels terminal or axillary, stalked, solitary, erect, 

 large, nearly flat, of numerous, smooth, general and partial 

 rays. Bracteas several general as well as partial, lanceolate, 

 taper-pointed, ribbed, with white membranous edges. Fl. nu- 

 merous, snow-white, small, the outermost a little irregular. 

 Cnl. of acute, rather unequal leaves. JViui elliptic-ovate, small. 

 Styles permanent, reflexed, slightly tumid at the base. Each 

 seed is semi-elliptical, with 5 pale, stout, rounded, prominent 

 ribs J the deep intermediate spaces striated. One of the seeds 

 is often abortive, and the other is then much incurved. Their 

 flavour is aromatic, and less acrid than the rest of the plant j 

 which like all the tribe, when in growing water, partakes of a 

 poisonous quality. 

 Surely the habit and characters of this plant are very remote from 

 Coriandrum. 



2. S. aiigust'ifol'ium. Narrow-leaved Water-parsnep. 



Leaves pinnate; leaflets unequally lobed and serrated. Um- 

 bels stalked, opposite to the leaves. Stem erect. 



S. angustifolium. Linn. Sp. PI. 1 672. IVilld. f. 1 . 143 1 . Fl.Br. 313. 

 Engl. Bot. V. 2. t. 139. Hook. Loud fasc. 2. t.\\\. Scot. 90, 

 .lacq. Ausir. f. 07. Ehrli. PI. Of. 413. 



