160 COMPOSITE. [Leontodon. 



a. and |3. Waste places and cultivated ground, common. Fl. June 

 Aug. 0. Two to three feet high. Flowers small, yellow. Involucre 

 conical when in seed. 



29. PRENANTHES. Linn. Wall-Lettuce. 



Involucre cylindrical, its scales equal, with smaller ones at the 

 base. Florets few. Receptacle naked. Pappus simple, ses- 

 sile. Name, from Trprjvrjs, drooping, and avOos, a flower. 



Syngenesia. JEqualis. 



1. P. muralis, Linn. Ivy-leaved Wall- Lettuce. Florets 5 ; 

 leaves lyrato-piunatifid and toothed, the terminal lobe angular ; 

 panicle with divaricated branches. Br. Fl. 1. p. 340. E. FL 

 v. iii. p. 348. E. Bot. t. 457. Chondrilla muralis, Lam. 

 Lindl. 



On old walls arid in woods. Woods at Collon, County of Louth ; 

 Doctor Wade, where I have also seen it. Fl. July. $ . Stem 2 feet 

 high, panicled above. Flowers small, yellow. Fruit with an elon- 

 gated, narrow neck, not really stipulate. 



30. LAPSANA. Linn. Nipple-wort. 



Involucre with small scales at the base. Receptacle naked. 

 Fruit quickly deciduous. Pappus none. Name ; Xejrag'w, 

 to purge, from its laxative qualities. 



Syngenesia. JEqualis. 



1. L. communis, Linn. Common Nipple-wort. Involucre of 

 the fruit angular; stem panicled; peduncles slender; leaves 

 ovate, petiolate, angulato-dentate. Br. FL 1 . p. 348. E. FL v. 

 iii. p. 376. E. Bot. t. 844. 



Waste and cultivated ground, common. FL July, Aug. 0. Stems 

 2 4 feet long. Leaves soft and thin, slightly hairy, the radical ones 

 more or less lyrate. Flowers small, yellow. 



31. LEONTODON. Linn. Dandelion. 



Involucre imbricated with scales, of which the outermost are 

 frequently lax and flaccid. Receptacle naked. Pappus sti- 

 pitate, simple. Name ; Xea'j/, a Lion, and odovs, a tooth) from 

 the tooth-like margins of the leaves. 



Syngenesia. JEqualis. 



1. L. Taraxacum* Linn. Common Dandelion. Outer scales 

 of the involucre reflexed ; leaves runcinate, glabrous, toothed. 

 Br. FL 1. p. 340. E. FL v. iii. p. 349. E. Bot. t. 510. 



Meadows and pastures. FL all summer. 1. Leaves all radical, 

 their segments more or less deep. Scape with a single, large flower. 



2. L. palustre, Sin. Marsh Dandelion. Outer scales of the 

 involucre erect, appressed ; leaves sinuated and toothed, nearly 



