CLASS V. ORDER II. 119 



inent angles. Leaves pinnate; leafets in half a dozen pairs, 

 with an odd one, ovate-lanceolate, equally serrate, or laciniated 

 if under water. Umbels solitary, mostly terminal. General in- 

 volucre of many leaves lanceolate, and occasionally serrate. 

 Partial involucres small. Flowers white. Fruit ovate, striated. 

 — From July to September. — Perennial. 

 SiUM LINE ARE. Mx. Nurvow leuved Sium. 



Leaves pinnate; leafets linear-lanceolate, finely 

 serrate. 



Stem angular and grooved; leaves simply pinnate, much nar- 

 rower than the foregoing species which it resembles. Umbels 

 terminal; involucre eight or ten leaved. Flowers white; fruit 

 ovate, ribbed. — Wet places. — June, July. — Perennial. 



130. URASPERMUM. 

 Uraspermum Claytoni. Nutt. Sweet Uraspcrmum. 



Stem smooth ; leaves decompound, leafets cut- 

 toothed ; styles of the fruit filiform, divergent. 



Syn. ScANDix dulcis. Muhl. 



Myrrhis Claytoni. Mx. ? 



OSMORHIZA LONGISTYLIS. Dc Cttlld. 



Root fleshy, fusiform or branching, with an agreeable sweet, 

 spicy flavor, like that of Anise. Stem about two feet high, 

 smooth when full grown, striated. Leaves ternate, the divisions 

 pinnate or ternate, the lower ones on long, smooth petioles, the 

 upper ones sessile. Stipules hairy at the edge. Leafets ovate, 

 toothed and cut, slightly pubescent, shining underneath. Um- 

 bels of a few long rays. General involucre of from two to four 

 deciduous lanceolate leaves. Partial ones five leaved, shorter. 

 Partial umbels few flowered, the central flowers abortive. Fruit 

 stipitate, clavate, oblanceolate, blackish and tasteless, covered, 

 especially on its lower part and stipe, with appressed, aculeate 

 bristles. The styles which crown the fruit are filiform and de- 

 flected, not parallel as in the following species. The dry seeds 

 are tasteless, and have a caudate appendage at base. — In rich 

 woods, Oak island, Watertown. — June. — Perennial. 



