DICOTYLEDONS. COMPOSITE. Erigeron. 241 

 24. GNAPHALIUM. 



Involucre imbricated, with (often) coloured membranous scales. 

 Receptacle naked. Florets of the ray subulate; some of the 

 disk occasionally abortive. Pappus rough. 

 * Flowers dioecious. 



1. Gn. dioicum, shoots procumbent, stems simple, corymbs 

 crowded, radical leaves spathulate, flowers dioecious, inner 

 scales of the involucre elongated obtuse coloured, p. 240. 

 Mountain heaths. 



** Flowers perfect. 



2. Gn. sylvaticum, stem simple nearly erect downy, flowers ax- 

 illary forming a distant leafy spike, leaves linear lanceolate 

 downy, p. 240. Dry sulaltdne pastures. 



3. Gn. supinum, stem decumbent branching only from the base, 

 flowering stems erect, flowers solitary or racemed, leaves linear 

 downy on both sides, p. 240. Alps. 



4. Gn. uliginosum, stem very much branched diffuse woolly, 

 leaves linear lanceolate downy, flowers in terminal crowded 

 clusters which are shorter than the leaves, p. 240. Wet 

 places. 



5. Gn.gallicum, stem erect dichotomous, leaves linear acuminate 

 downy, flowers crowded axillary and terminal, clusters much 

 shorter than the leaves, p. 240. Dry banks. 



6. Gn. minimum, stem erect branched, branches spreading, 

 leaves lanceolate acute cottony, flowers conical clustered late- 

 ral and terminal, clusters longer than the leaves, p. 241. 

 Sandy hills. 



7. Gn. germanicum, stem erect proliferous at the summit, leaves 

 lanceolate downy acute, flowers capitate in the axils of the 

 branches and terminal, p. 241. Sandy ground. 



25. CONYZA. 



Involucre roundish, imbricated. Receptacle naked. Florets of 

 the ray 3-cleft. Pappus rough. 



I. C. squarrosa, leaves pubescent ovato-lanceolate serrated, the 

 upper ones entire, stem herbaceous corymbose, scales of the 

 involucre recurved leafy, p. 242. Dry soils, rare. 



II. RADIATI. Flowers rayed, or with the florets of t fie cir- 

 cumference ligulate. 



26. ERIGERON. 

 Involucre imbricated. Receptacle naked. Florets of the ray 



mimerpus, very narrow (mostly of a different colour from the 



disk). Pappus simple. 

 1. E. acre, peduncles alternate (scarcely racemose) single-flower- 



w 



