416 178.ChondrilIa. 39. COMPOSITE, A. PL ex. cat 



Roof woody; siem round, upright; radical leaves petioled ; 

 panicle divaricated ; Jiowers bracteated, yellow. 



^. integrifolia. Upper leaves not cut. 



IV. 179. PRENANTHES. Vaillant. Prenanih. 

 Bractece few, short; pericline cylindrical; scales 8 or 



10, equal, membranaceous at the edge; cli?ia?iihus with 

 hollow dots, bald ; jiowers 5 or 6 in one series ; akenium 

 ovate, compressed, streaked, rather rough ; pappus sessile, 

 very soft, snow-white, fugacious, — Leaves radical and cau- 

 line ; Jiowers divaricatedly panicled, yellow or purple. 



Prenanthes pulchra. Handsoyne prenanth, 



Leaye^ rather rough ; root-leaves runcinate; stem-leaves 



embracing the stem, ovate, lanceolate, arrowlike at the base; 



panicle corymbosely divaricated, naked. 



Crepis pulchra, Lin. S. P. 1134. 

 Lapsana piilcbra, Filt. Dauph.3, 163. 

 Chciidrilla pulchra, Lamarck End. Meth. 277. 

 Prenanthes hieracii folia, Willd. S. P. 3, 1541. 

 Prenanthes pulchra, Mwnch Meth. 534. 



Alpine rocks ; annual ; June to September. 

 Stem slender, spreading; Jiowers small, yellow; pericline 

 pyramidical, bald. 



V. 180. LACTUCA. Pliny. Lettuce. 

 Bractece 8 or 10, unequal, pointed ; pericline cylin- 

 drical ; scales 8, membranaceous at the edge, pointed ; 

 clinanthus flat, bald, with hollow dots ; calaihide many- 

 flowered, 7-rowed ; akenium ovate, attenuated, compressed, 

 streaked lengthways ; pappus stipitate, very soft, hairlike, 

 fugacious. — Stem mostly prickly. 



1. Lactuca saliva. Cultivated lettuce. 



Root-leaves oblong, lanceolate, toothed at the edge; stem- 

 leaves heartshape ; Jiowers corymbose. 



Lactuca sati va, Ger. em. 306, 1 ; Lin. S. P. 1 1 18. 

 Coss Lettuce. 



Cultivated for a pothei'b and salad ; annual ; June, Sept. 



Lower leaves spreading, oblong, wrinkled ; akenium white ; 

 pappus-stipes little shorter than the akenium. — Leaves nar- 

 cotic ; if eaten in large quantities laxative, especially if 

 boiled. 



