HYDROCOTYLE. PENTANDRIA. DIGYNIA, 306 



regular umbel of 3 or 4 rays, subtended at the base by a ses» 

 sile ternate leaf divided similarly to that of the root. Leaflets 

 of the involucrum simple, entire, linear-oblong. Flowers 

 white, stellately expandingo Petals obovate-oblong, or attenuate 

 downwards, so as to appear unguiculate. Cahjx obsolete, 

 marginal. Staviens longer than the petals ; filaments erect ; 

 anthers oval, deep brown. Styles subulate, persistent, twice 

 the length of the germen ; stigmas obsolete. Germen tur- 

 binate, laterally compressed, truncated above. Seed gibbously 

 convex, marked with 3 curved lines, 2 lateral and 1 dorsal ; 

 the margin of the commissure being inconspicuous, and forming 

 a straight line. JV^u 1 1. 

 Hab. In shady alluvial soils subject to inundation. Near Lan- 

 caster, Pennsylvania. Muhlenberg. April. 



j\i'u tt all refers to this species the Hydrocottle comfiO" 

 st^aof Pursh Fl. IL p. 732. 



202, SISON. L.—Spren^ei. 



Fruit ovate, solid, 3-ribbed on the back ; intervals 

 f valleculas J convex ; sides contracted ; raphis exca- 

 vated. Involucrum few -leaved or 0. Roem. ^ 

 Schult. Gen. 1177. Sisonis spp> L, Smyrnii 

 et Thaspii ^/)/>. Niitt., &c. Honey-wort. 



\,^. aureus Spreng.: stem nearly simple, snicate ; 

 leaves biternate, shining ; leaflets oblong-lanceolate, attenuate 

 at the base, incisely serrate, involui rum 0. R o e m. ^ 

 S c A w / /. VI. p. 410. Smyrnium Gwr^wm L. Willd,Spec, 

 Lp.l468. Mich. Fl.]. p. 171. P m r s A F/. I. p. 196, 

 Elliott Sk. I. p. 359. Walt. Car. p. 114. Thaspium 

 aurtum N ut t. Gen. I. p. 196, 



Root perennial. Stem a foot and a half, or 2 feet high, smooth, 

 angular and sulcate. Leaves biternate ; lateral divisions some- 

 times simple, or 2 — 3-parted. Umbel compound ; primary rays 

 unequal, 1 — 2 inches long, deeply sulcate. Partial involu- 

 crum 2 — 3-leaved, minute. Calyx 5-toothed. Corolla bright 

 yellow. Fruit elliptic, with 3 winged ribs on the back. 



Hab. On rocky hills ; rare. June — July. 



2. S. integerrimus Sp r e n g. : stem nearly simple ; leaves 

 bi-triternate, glaucous ; leaflets oval, entire ; umbel with 

 elongated rays ; involucrum 0. R o e m. ($'■ S chul t.W. t^, 

 410. Smyrnium integtrrmmm L. Willd, Spec. I. p 1468. 

 Mich. Fl.l. p.m. Pursh Fl. I. p. 136. Elliott 

 Sk. I. p. 360. J^utt. Gm. I. p. 105. 



Root perennial. Stem a foot and a half high, very smooth. Leaf- 

 lets very entire, mucronate. Rays of the umbel spreading, 

 39 



