PICRIS. LACTTJCA. 227 



rows. Fl. yellow, truncate, 5-toothed. Anth. yellow. There 

 are 2 forms of this plant : (a) inv. equalling the fi., marginal 

 fr. obscurely striate and rough throughout (Sy. E. B. 798) ; 

 (b) [var. Symei Ar. Benn.] inv. rather shorter than the fl., 

 marginal fr. (in my specimens) yellow slightly furrowed and 

 quite smooth (E. B. 434). Meadows and pastures, less frequent 

 than the preceding. 13. ? VI. E. S. I. 



*3. T. porrifolium (L.) ; inv. longer than the flowers, ped. 

 much thickened upivards, 1. tapering slightly dilated just above 

 the base. E. B. 038. St. 34 feet high, erect, branched. L. 

 slightly broader just above the base, then gradually narrowing 

 to an acute point. Heads twice as large as in the two preceding. 

 Jnv. usually longer than the fl., sometimes only equalling or 

 even falling short of them. Fl. purple. Marginal fr. with 

 scalelike tubercles throughout but particularly on the ribs. 

 Moist meadows. B. VI. Salsify. E. I. 



40. PI'CRIS Linn. 



1. P. hieracioides (L.) ; st. rough with forked and hooked 

 bristles, 1. linear or lanceolate dentate or sinuate, upper 1. some- 

 what clasping, heads solitary terminating the stem and branches, 

 outer phyll. lax oblong bristly on the keel glabrous on the mar- 

 gin, Ir. constricted just below the pappus. E. B. 196. St. 1 

 3 feet high, divaricately branched above, irregularly corymbose, 

 very rough. Florets yellow. P. arvalis (Jord.) with branches 

 ascending and heads in an umbellate corymb passes gradually 

 jnto the type. Dry banks. B. VII. IX. E.^ 



41. HELMIN'THIA Juss. Ox- tongue. 



1. H. echioides (Gaert.) ; st. erect hispid with rigid 3-fid and 

 hooked hairs from tubercular bases, phyll. 5 ovate-cordate. 

 E. B. 972. Picris (L.). St. 23 feet high, branched, covered, as 

 well as the leaves and involucre, with strong prickles springing 

 from white tubercles and with 3 minute hooks a,t tne apex 

 (glochidate). L. clasping. Dry banks. A. VII. IX. E. I. 



E. Receptacle generally without scales. Pappus filiform, deciduous, 

 never feathery , nor dilated at the base. Fruit compressed. 



42. LACTU'CA Linn. Lettuce. 

 * Beak long, white. Leaves with a bristly keel. 



1. L. salig'na (L.) ; upper /. linear entire acuminate with a 

 sagittate base, lower 1. pinnatifid, beak twice as long as the fruit. 



