194 45. cOMPOSiTiE. 



phyll. lax oblong bristly on the keel glabrous on the margin, fr. 

 constricted just below the pappus. — E. B. 196.- — St. 1 — 3 feet 

 high, branched above, rather corymbose, very rough. Florets 

 yellow.— Dry banks. B. VII.— IX. E. I. 



40. Helminthia Juss. Ox-tongue. 



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

 hairs from tubercular bases, st. erect, phyll. 5 ovate-cordate. — 

 E.B. 972. — St. 2 — 3 feet high, branched, covered, as well as the 

 leaves and involucre, Vfith strong prickles springing from white 

 tubercles and with 3 minute hooks at the apex (glochidate). L. 

 clasping. — Dry banks. A. VII. — IX. 



Sections. LACTUCE^. Receptacle generally without scales. 

 Pappus fihform, deciduous, never feathery nor dilated at the base. 

 Fruit compressed. 



41. JjACtvca Linn. Lettuce. 

 * Beah elongated, white. Leaves with a bristly keel. 



1. L. saligna (L.) ; upper I. linear entire acuminate with a 

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

 — E.B. 707. — St. 2 feet high, slender, wavy, slightly branched. 

 Heads in small alternate tufts forming long clusters. Florets 

 yellow. — Chalky places and near the sea. B. VII. VIII. E. 



2. L. virosa (L.) ; I. horizontal oblong auricled and clasping 

 mucronate-dentate or sinuated, beak equalling the black fruit. — 

 E. B. 1957. — St. 2 — 4 feet high, leafy, branched above, panicled. 

 Heads scattered, with many heartshaped acute bracts. Plant 

 full of acrid milky juice. — Dry banks. B. VII. VIII. Acrid 

 Lettuce. E. S. 



3. L. Scariola (L.) ; I. upright arrowshaped at the base and 

 clasping sinuate, beak equalling the pale fruit. — E. B. 268. — St. 

 2 — 5 feet high, leafy, panicled. Heads scattered with many 

 heartshaped bracts. Juice rather less acrid than in the preceding. 

 ^Waste places, rare. B. VII. VIII. Prickly Lettuce. E. 



** Beak short. Leaves with a smooth keel. 



4. L. muralis (DC.) ; florets 5, 1. lyrate-runcinate angled and 

 toothed clasping, terminal lobe largest angled, beak much shorter 

 than the fruit, heads panicled. — Prenanthes Sm., E. B. 457. — 

 St. erect, a foot high, smooth, round, hollow. Florets bright 

 yellow. Fruit black.— Banks and old walls. A. ? VII. E. I. 



