COMPOSITE. 37 



P. purpurea, L. ; stem much branched, glabrous, leaves 

 cordate-amplexicaul, bluish-green beneath; mountain 

 woods, common. 



63. CHONDRILLA, L. 



Flowers yellow; capitules of only 7-12 flowers in two 

 rows ; involucral bracts few, in one row, surrounded by 

 small scales ; pappus-hairs simple, white ; achene beaked, 

 with five spine-like teeth. 



C.juncea, L. ; stem 2-3 ft., capitules small, racemose, 

 radical leaves runcinate, stem-leaves linear; dry hills; 

 Western Switzerland, Pyrenees. C. prenanthoides, Vill. ; 

 stem 8-12 in., capitules larger, corymbose, radical leaves 

 obovate-lanceolate, toothed, upper leaves linear ; beds of 

 mountain streams ; Grisons, St. Gallen, Tirol, Salzburg, 

 Carinthia. 



64. LaCTUCA, L. 



Flowers yellow or blue ; capitules generally small, 

 few-flowered, corymbose; involucral bracts in several 

 rows ; pappus of many soft slender feathery hairs ; fruit 

 beaked. 



A. Flowers blue : — L. perennis, L. ; capitules large, on 

 long stalks, involucral bracts cordate, lower leaves pin- 

 natifid, upper lanceolate, stem very thick (J-i in. diam.) ; 

 stony slopes ; Switzerland, Jura, Pyrenees, local. L. alpi- 

 nus, Benth. {Sonckus alpinus, L., Mulgedium alpinum, 

 Less.) ; stem 2-4 ft, purple, glandular-hairy, capitules 

 large (i in. diam.), racemose, leaves lyrate with a very 

 large terminal segment; high, not uncommon; Switzerland, 

 Jura, Vosges, Pyrenees. L. Plumieri, G. and G. {Sonckus 

 Plumieri, L.) ; involucral bracts cordate, lower leaves 



