DICOTYLEDONS.- UMBELLIFER/E. Sclinum. 251 



acute, equal. Fruit without teeth (or calycine segments), sub- 

 orbicular, laterally compressed, striated. 



1. H. vulgans, leaves peltate orbicular crenate, umbels of 5 8 

 flowers, p. 87. Boggy places. 



3. SAN1CULA. 



Umlellules clustered, subcapitate, centra\Jlowers abortive. Petals 

 obcordate. Fruit clothed with hooked bristles. 



1. S. europcea, radical leaves simple, flowers all sessile, p. 87.- 



Woods. 



4.CAUCALIS. 

 Involucres undivided. Flowers radiant, those of the disk abortive. 



Fruit subovate, striated, rough with rigid bristles. 



1. C. AntfiriscuSy leaves bipinnate, leaflets ovato-lanceolate, um- 

 bels of many close rays, general involucre of many leaves, 

 branches nearly upright, p. 87. Hedges. 



2. C. infesta, leaves pinnate, leaflets lanceolate almost pinnatifid, 

 umbels of many close rays, involucre often wanting, branches 

 spreading, p. 87. Cornfields. 



3. C. nodosa, umbels lateral simple subsessile, stem prostrate. 

 p. 88. Road- sides. 



5. DAUCUS. 



Involucres pinnatifid. Flowers somewhat radiant, those of the 

 disk abortive. Fruit muricated. 



1 . D. Carota, stem hispid, leaves 2 3-pinnate, leaflets cut linear- 

 lanceolate acute,fruit-bearing umbel concave, fruit bristly, p. 88. 

 Borders of fields. 



6. BUNIUM. 



Partial involucres setaceous (often wanting). Petals uniform. 



Fruit oblong, striated, with the interstices tuberculated. 

 1 . B. Bullocastanum, general involucre of scarcely 3 leaves, leaves 



tripinnate linear glabrous, fruit ovate, p. 88. Pastures. 



7. CONIUM. 



Partial involucres of 3 leaves, all on one side. Petals nearly uni- 

 form. Fruit ovate, tumid, with 5 undulated ribs on each side. 



1. C. maculatum, seeds without prickles, stem much branched 

 polished and spotted, p. 88. Banks. 



8. SELINUM. 



Involucres, general and partial, reflexed. Petals heart-shaped, 

 nearly uniform. Fruit compressed, striated down the middle. 



1 . S. palustre, lactescent, leaflets pinnatifid, segments linear-lan- 

 ceolate, stem solitary striated, rays of the umbels pubescent, 

 styles after flowering" divaricating, p. 88. Marshes, rare. 



