518 SVNGENESIA— POLYGAM.-.^QU. Leoiuudou. 



1. P. rnui'alis. Ivy -leaved Wall-lettuce. 



Florets five. Leaves runcinate. 



P. muralis. Linn. Sp. PZ. 1 1 2 1 . Wilkl u. 3. 1 543. Fl. Br. 82 1 . 

 Engl. Dot. V. 7. t. 457. Curt. Lond. fasc.5.t.bS. Hook. Scot. 227. 

 Fl.Dan.t. 509. 



P. n. 18. Hall. Hist. v.l.O. 



Lactuca sylvestris murorum flore luteo. Rail Sijn.\62. Bauh. 

 HisLv. 2. 1004./. 



Sonchus Iffivis muralis. Ger. Em. 293./. 



S. laevior vulgaris secundus. Clus. Hist. v. 2.146./. 



S. Isevis laciniatus muralis, parvis floribus. ^Joris. v. 3. 61 . sect. 7 

 t.3.f.\4. 



Ivy Lettuce. Petiv. H. Brit. t. 15./. 5. 



On old walls, or in woods on a chalky soil. 



Perennial. July. 



Hoot rather woody, with several long fibres, //eri slender and not 

 inelegant, smooth in every part, tender and brittle, with a milky 

 bitter juice. Stem a foot high, round, hollow, leafy, simple 

 below. Leaves runcinate, toothed, clasping at the base ; sud- 

 denly terminating in a large, ivy-like, toothed lobe ; their under 

 side more or less purple, like the leaves of a Cyclamen ; radical 

 ones stalked. Panicle much branched, and singularly divari- 

 cated in all directions. Bractcas small, ovate, acute. Fl. erect, 

 bright yellow, with a slender purplish cali/x. Seed obovate, 

 striated, black. Down raised on a short stalk as the seed ripens. 

 The upper leaves are sometimes undivided. 



375. LEONTODON. Dandelion. 



Linn. Gen. 402. Fl. Br. 822. Gcerin. t. 158. 



Taraxjicum. Hall. Hist. v. 1. 23. Juss. 1G9. Lam. t. 653. 



Dens Leonis. Tourn. t. 266. 



Common Cal. oblong, double ; innermost of several linear, 

 equal, parallel scales ; outer of fewer and shorter, lax or 

 reflexed ones, at the base. Cor. compound, of very nu- 

 merous, imbricated, equal, perfect, ligulate, abrupt, 5- 

 toothed7?or£'^5. Filam. capillary, short. Anth. in a cy- 

 lindrical tube. Germ, obovate, furrowed. Style cylin- 

 drical, prominent. 8tigm. 2, revolute. Seed-vessel none, 

 the calyx converging, finally altogether reflexed. Seed 

 obovate, furrowed, rough. Doivn capillary, radiating, on 

 a long cylindrical stalk. Recept. naked, convex, dotted. 



Stemless milky Jicrhs^ with radical i-uncinate leaves, and 

 large yeWow Jlowers, on simple, naked, hollow stalks. 

 Aggregate dorvn of the seeds forming a light globe, as in 

 Tyagopogoiii scon dispersed by the wind. 



