SPECIES AND VARIETIES. 263 



tlack ; ray-florets 12-15^ linear-oblong; aclienes of the disk 

 covered with short hairs, those of the ray glabrous. — Ragwort. 

 — Roadsides, waste places, and bushy pastures. El. July to 

 September. It sometimes assumes the spreading inflorescence 

 of S. aquaticus, in which the achenes both of the disk and ray 

 are however always smooth. 



S. erucsefolius resembles this, but the leaves are more re- 

 gularly divided into narrower segments, the terminal ones not 

 very different from the others ; and the achenes of the ray- 

 florets are hairy like those of the disk. [See also p. 58.] 



(154) Inula. 



I. Helenium : stems stout, erect, scarcely branched, 3-5 

 feet high ; leaves often a foot long, oblong, narrowed into a 

 stalk ; the upper ones clasping the stem, downy beneath ; 

 flower-heads very large, the ray-florets numerous, linear, 

 yellow ; involucral bracts broadly ovate, softly hairy. — Ele- 

 campane. — Moist pastures. Fl. July, August. 



I. Conyza : biennial ; stems hard, erect, 2-3 feet high, 

 roughly downy; leaves ovate-lanceolate, downy, the upper 

 sessile; flower-heads numerous, in a terminal corymb; the 

 ray-florets numerous but very small. — Ploughman's Spikenard. 

 — Hedges, banks, and roadsides. Fl. July to September. 



(155) Pulicaria. Fleabane. 



P. dysenterica : stems erect, 1-2 feet high, loosely branched, 

 downy or woolly ; leaves oblong, waved, clasping the stem 

 with rounded auricles, woolly; flower-heads pedunculate, 

 axillary or terminal, corymbose, with a ray of very numerous, 

 linear, spreading bright yellow florets. — Wet pastures, ditches, 

 and roadsides. Fl. August. 



