86 BOTANY OF LA SALL,E COUNTY. 



shaped. Among" the grass in wet lands. 

 G. pilosum. Hairy; leaves oval, pedicels 2 to 3 



forked. Dry places. 

 G. circaezans. Smooth or downy, 1 ft.; leaves 



oval to long-ovate, obtuse; peduncles - once 



forked, flowers greenish. Woods. 

 G. trifidum. Leaves in whorls of 4 to 6, oblance- 



olate peduncles 1 to 7 flowered; var. Peat 



swamp. 



G. concinnum, Leaves in 6's linear acutish. vein- 

 less; peduncles 2 to 3 times forked. 

 G. asprellum, Branching-, rough hooked prickles 



turned backward; leaves in whorls of 6, 4 to 5 



on branchlets, oval-lanceolate. Rich lands. 

 G. triflorum, Bristly roughened backward on 



angles leaves elliptial lanceolate, bristle pointed; 



peduncles 3 flowered. Woods, sweet scented. 

 Order 53. VALERIANACEAE. Valerians. 



Leaves opposite and without stipules. 

 VALERIANA. P. Roots thick, strong- scented. 

 V. edulis. Leaves fine-hairy, of the root spatulate, 



of the stem pinnately parted into 3 to 7 narrow 



lobes, thickish, flowers W. 1 to 4 ft. Ju. Wet 



places. 

 VALERIANELLA. P. Corn Salad, Lamb Lettuce. 



Stems forking; leaves opposite, oblong- or linear. 

 V. radiata. Leaves linear-oblong, obtuse, toothed 



toward base, smooth; light G. Flow T ers W. in 



cymes, small; 6 to 12 in. Ju. Wet springy lands. 

 Order 55. COMPOSITAE. Sunflowers. 



Herbaceous or shrubby plants; flowers in close 

 heads, surrounded by a several, many-leaved envelope, 

 the involucre and looking like one large flower. The 

 separate flowers -florets--a.re small and of two kinds, 

 tubtularV\\K those of the thistle and the middle of the 



