262 SUMMER FLOWERS. 



(151) Erig^eron. 



E. acris: annual or biennial; stems erect, ^-1 foot high, 

 slightly branched, rough with short hairs; leaves linear or 

 lanceolate, entire ; flower-heads rather small, forming a short 

 loose panicle ; florets numerous, mostly filiform and short, the 

 outer ones pale purple, projecting slightly beyond the invo- 

 lucre. — Fleabane. — Pastures, roadsides, and waste places. Fl. 

 July, August. 



(152) Solidag'O. Golden Rod. 

 S. Virgaurea: stems erect, stiff', nearly simple, |-2 feet 

 high ; leaves obovate, stalked, those of the stem oblong or lan- 

 ceolate; flower-heads crowded in a narrow-oblong terminal 

 panicle, with a spreading ray of 10-12 bright yellow florets. — 

 Woods. Fl. July to September. 



(153) Senecio. Groundsel. 

 * Bay-florets small, revolute. 



S. sylvaticus : annual ; stems 1-2 feet high, erect, branched, 

 downy; leaves deeply pinnatifid, downy with oblong unequally- 

 toothed segments ; flower-heads numerous, in a loose corymb ; 

 the outer florets ligulate, but small and rolled back. — Banks, 

 waste places, and borders of woods. Fl. July to August. 



S. viscosus resembles this, but is coarser, and covered with 

 a short, viscous, strong- smelling down. 



** Bay-florets spreading, conspicuous. 

 S. Jacobsea : stems 2-4 feet high, erect, scarcely branched, 

 except at top; lower leaves oblong-ovate, lyrate pinnatifid, 

 those of the stem sessile, bipinnatifid, with oblong deeply- 

 toothed segments ; flower-heads rather large, bright yellow, in 

 a compact terminal corymb ; involucral bracts tipped with 



