DICOTYLEDONS. UMBELLIFER/E. AlllhriSCllS. 253 



1. S. vertkillatrim, leaflets all capillary in vvhorled segments. 

 p. 90. — Moist pastures. 



2. S. imindatum, stem creeping, inferior leaves capillaceo-multi- 

 partite superior pinnatifid, umbels generally of 2 rays. p. [)l. 

 — Inundated places. 



3. S. segeium, stem erect, leaves pinnate, leaflets broadly ovate 

 serrated, radical ones lobed, umbels at first drooping, their ravs 

 unequal, p. 91. — Fields. 



IG.CENANTHE. 



Floivcrs radiant, those of the disk sessile and abortive. Fruit 

 crowned with the cul. and styles, corky. 



1 . CE. fistulosa, root creeping stoloniferous, stem leaves plimated, 

 their main petiole as well as the stem cylindrical tubular, um- 

 bels of verv few rays. p. d\. — Ditches. 



2. (E. pimpinelloides, leaflets of the radical leaves wedge-shaped 

 cloven, those of the stem linear entire very long, gen. involucre 

 of several linear leaves, p. 91. — Salt marshes. 



3. CE. crocata, all the leaflets wedge-shaped cut nearly equal, in- 

 volucre of many leaves, p. 91. — Ditch banks. 



B. Umbels with a partial invohicre; imiversal none. 



17. PHELLANDRIUM. 



Flowers of the disk smallest. Fruit ovate, smooth, crowned 

 with the cal. and styles. 



I. Ph. aqiiaiicum, segments of the leaves divaricated, p. 92. — 



Ditches and pools. 



18. CICUTA. 

 Fruit subovate, furrowed. 

 1 . C. virosa, umbels opposite to the leaves, sheaths of the leaves 



obtuse, p. 92. — Sides of lakes. 



19..^THUSA. 

 Partial invohicre of 3 leaves, all on one side, pendulous. 

 1. M. Cynapium. p. 92. — Fields and gardens. 

 20. SCANDIX. 



Friiit terminated with a very long rough beak. Partial involucre 



cut or pinnated. 

 1. S. Pecte?i-Feneris, leaflets cut into many linear segments, fruit 



and beak roughish. p. 92. — Cornjields. 



21. ANTHRISCUS. 

 Fruit ovate, hispid, with a short glabrous beak. (Pers.) 



1. A. vulgaris, bristles of the fruit hooked, stem smooth, umbels 

 mostly lateral, p. 93. — Waste places. 



