264 SUMMER FLOWERS. 



P. vulgaris resembles this, but has narrower, less woolly 

 leaves, and the flower-heads are much smaller, the florets of 

 the ray being very short; the minute outer scales of the 

 pappus are also distinct, not forming a little cup as in P. dy- 

 senterica. 



(156) Gnaphalium. 



* Flower-heads dioecious. 



G. dioicum: flowering stems almost simple, 2-5 inches 

 high ; leaves obovate or oblong, the upper ones linear, cot- 

 tony beneath ; flower-heads 3-4 together, in compact, termi- 

 nal corymbs, dioecious ; inner bracts of the involucre in the 

 males with broad, white, petal-like tips, spreading like ligulate 

 florets : in the females narrow, white-tipped, not spreading. 

 Cat's-ear. Mountain pastures. Fl. June, July. 

 ** Flower-heads hermaphrodite. 



G. sylvaticum : stems simple, erect, 2-8 inches high ; leaves 

 linear, cottony on the under side ; flower-heads small, cylin- 

 drical or ovoid, solitary or in little clusters in the axils of the 

 upper leaves, forming a long leafy spike; the involucres 

 scarcely cottony, with brown, shining bracts. Woods and 

 heaths. Fl. July to September. 



G. uliginosum : annual; stems much branched, cottony 

 six inches high ; leaves linear or narrow- oblong, the upper ones 

 waved; flower-heads small and clustered, many together, 

 within a tuft of rather long leaves at the extremity of the 

 branches ; involucral bracts brown and scarious. Wet sandy 

 places. Fl. July, August. 



(157) FilagO. CUDWEED. 



F. germanica : annual ; stems erect, cottony, 6-8 inches 

 high, simple or branched at the base, each branch terminated 



