PENTANDRIA— DIGYNIA. Sium. 57 



S. nodiflorum. Fl.Dan. t. 247. 



S. erectum. Huds. erf. 1. 103. 



S.n.77S. Hall.Hist.v.1.346. 



S. sive Apium palustre foliis oblongis. Bauh. Pin. 154. Bait 



Sijn. 211. 

 S. minus. Riv. Pentap. Irr. t. 79. 

 S. verum Matthioli. DalecJi. Hist. 1092./. 



In ditches and rivulets, not uncommon. 



Perennial. July, August. 



Root creeping extensively. Whole plant about half the size of the 

 foregoing. Stem round, striated, smooth, erect, much branched, 

 hollow. Leaves simply pinnate ; lecrflets sessile ; those of the 

 lower leaves ovate, strongly serrated ; of the upper lanceolate, 

 pointed, deeply and unequally cut, partly hastate, all very 

 smooth. Umbels on lateral stalks, generally shorter than the 

 leaves to which they are opposite, each of many general and par- 

 tial rays. Bracteas general as well as partial reflexed, leafy, 

 unequal, lanceolate, undivided, cut, or sharply 3-lobed. Cat. of 

 5 minute teeth. Petals white, very slightly irregular in the 

 outermost flowers. Styles more tumid at the base than the 

 former, and almost ovate in that part ; at length reflexed in 

 their upper half, with obtuse stigmas. Fruit roundish-ovate, 

 short ; with 3 dorsal, not very prominent ribs, and 2 remote la- 

 teral ones, to each seed. 



3. S. nodiflorum. Procumbent Water-parsnep. 



Leaves pinnate ; leaflets ovate, equally serrated. Umbels 

 nearly sessile, opposite to the leaves. Stem procumbent. 



S. nodiflorum. Linn. Sp.Pl.36l. Willd.v. 1. 1432. Fl. Brit.3l3. 



Engl. Bot. V. 9. t. 639. Woodv. Med. Bot. ^ 182. Hook. Scot. 90. • 

 S. umbellatum repens. Ger. Em. 256, 258. ti.3; excluding the 



reference to Dalech. Hist. Lugd. 1092. Raii Syn. 211. 

 S. aquaticum procumbens, ad alas floridum. Moris, v. 3. 283. sect. 



9.t.5.f.3. 

 Creeping Water-parsnep. Pet. H. Brit. t. 26. f. 3. 



In ditches and rivulets frequent. 



Perennial. July, August. 



Smaller than the last. Root creeping. Stems procumbent or float- 

 ing, often creeping, various in length, branched, round, hollow, 

 striated. Leaves distant, each of 2 or 3 pair, with an odd one, 

 of ovate, serrated, not deeply cut, leaflets; the terminal one 

 sometimes confluent with the two next. Foot-stalks with a 

 broad membranous border. Umbels on very short stalks oppo- 

 site to the leaves, each of about 5, 6, or 7 general rays ,■ the 

 pariial umbels of more numerous, short and slender ones. Ge- 

 neral bracteas solitary, or more frequently wanting ; partial 

 several, ovate, concave, white with green ribs. Fl. small, green- 



