244 SUMMER FLOWERS. 



leaves pinnate, the segments ovate or oblong, toothed or lobed ; 

 the upper leaves much smaller, with small narrow deeply 

 three-lobed segments; umbels slender, of 3-5 rays, with few 

 white flowers on short pedicels ; involucres of few, linear bracts, 

 those of the partial umbels smaller, and often turned to one 

 side. — Honewort. — Hedges and thickets. Fl. August. 



(113) Bimium. Earth-nut, or Pig-nut. 



B. flexuosum : tuberous stems erect, slender, glabrous, 1-2 

 feet high, with a few forked branches; leaves few decaying 

 early, thrice tern ate, the divisions short, narrow, pointed, entire 

 or three-lobed ; stem-leaves few, with narrow-linear divisions, 

 the central lobe of each segment much longer than the lateral 

 ones ; umbels terminal, or one opposite the last leaf, of 6-10 

 rays with general involucres of 1-3 bracts, the partial ones 

 more numerous. — Woods and pastures. Fl. May, June. 



(114) Sium. Water Parsnip. 



S. latifolium : stems glabrous, stout, erect, angular, 2-4 

 feet high; leaves pinnate, the lower very long, with 6-10 

 pairs of large ovate-lanceolate toothed segments; the upper 

 shorter, with fewer and smaller segments; umbels large, of 

 15-20 rays, all terminal, general and partial involucres of 

 several lanceolate often toothed bracts. — Ditches and edges of 

 streams. Fl. July, August. 



S. angustifolium : stems erect, branched, leafy, round, 

 striated 1-3 feet high ; leaves pinnate, with 8-10 pairs of un- 

 equally-lobed ovate segments, deeply and sharply toothed; 

 umbels numerous, mostly lateral, with 8-15, rarely more, 

 rays; involucral bracts lanceolate, often toothed. — Ditches 

 and shallow streams. Fl. August. 



