LACTUCA. TARAXACUM. 207 



E. Seceptacle generally without scales. Pappus filiform, decidu- 

 ous, never feathery, nor dilated at the hase. Fruit compressed. 



42. Laoitt'ca Linn. Lettuce. 

 * JBeak long, white. Leaves with a bristly Jceel. 



1. Z. salig'na (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 tigh, slender, wavy, slightly branched. 

 Heads in small alternate tufts foiTiing long clusters. Flowers 

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



2. L. virdsa (L.) ; upper I. horizontal oblong auricled and 

 clasping miwronate-dentate or sinuate, beak equalling the black 

 fruit. — E. B. 1967. — St. scabrous, 2 — 4 feet high, leafy, branched 

 above, pauicled. Heads scattered, with many heartshaped acute 

 bracts. Plant full of acrid milky juice. — Dry banks. B. VII. 

 Vni. Aorid Lettuce. E. S. 



3. L. ScaHola (L.) ; upper I. upright arrowshaped at the base 

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

 St. slightly scabrous below, 2 — 5 feet high, leafy, panicled. 

 Heads scattered, with many heartshaped acute bracts. Juice 

 rather less acrid than in Sp. 2. — Waste places, rare. B. VH. 

 VIII. Prickly Lettuce. E. 



** Beak short. Leaves with a smooth keel. 



4. L. murdZis (DO.) ; florets 5, 1. lyrate-runcinate angled and 

 toothed clasping, terminal lobe largest, beak much shorter than 

 Hie fruit, heads panicled.— PreraoniAes L. E. B. 457. — St. erect, 

 a foot high, smooth, round, hollow. Flowers bright yellow. 

 Fruit black.— Banks and old walls. A. P VH. E. I. 



43. Taraxacum Juss. Dandelion. 



I. T. officinale (Wigg.) ; 1. runcinate toothed, fr. linear-obo- 

 vate blunt and muricate at the top longitudinally striate with a 

 long beak. — Stalks single-headed, radical, hollow. Fl. yellow. 

 L. all radical, very variable, glabrous or slightly hispid. — 

 I. Outer phyll. reflexed or patent. — a. Leantodon Taraxacum 

 (L.) ; outer phyll. linear dejiexed inner ones simple at tip, fr. 

 yellow its upper half muricate, crown of the root glabrous or 

 woolly, 1. runcinate broad. — E. B. 510. — (3. T. leevigatum (DC.) ; 

 outer phyll. erect-patent ovate, inner gibbous or aj^endaged at 

 tip, fr. reddish yellow muricate at the top, beak with a thick- 

 ened and coloured base, 1. runcinate-pianatifld with unequal 

 •tgeth. — y. T. erythrospermum (DO.) ; outer phyll. lanceolate ad- 

 pressed or patent, inner gibbous or appendaged at tip, fr. bright 



