ICO 
46. COMPOSIT.E. 
43. PiCRis Linn. 
1. P. hieracioides (L.); rough with forked and hooked bristles, 
1. lanceolate dentate or sinuated, upj)er 1. somewhat clasping, 
heads solitiiry terminating the stem and branches, outer involu- 
cral scales la.\ oblong bristly on the keel glabrous on the margin, 
fi'. constricted just below the pappus. — E. B. 196. — St. 1 — 3 
feet high, branched above, rather corymbose, very rough. Florets 
yeUow. — Dry banks. B. VII. — IX. E. I. 
44. IIelmintiiia Juss. Ox-tongue. 
I. H. echioides (Gaert.); hispid with rigid 3-fid and hooked 
hairs from tuhercidar bases, st. erect, involucral bracts 5 ovate- 
cordate. — E. B. 972 . — St. 2 — 3 feet high, branched, covered, as 
well as the leaves and involucre, with strong j>rickles springing 
from white tubercles and with 3 minute hooks at the apex (glo- 
chidate). L. clasping. — Dry banks. A. VII. — IX. 
Sections. LACTUCE.^E. Receptacle generally without scales. 
Paj)pus filiform, very soft, deciduous, never feathery nor dilated 
at the base, silvery. 
45. Lactuca Linn. 
* Beak elongated. 
1. L. saligna (L.) ; 1. with a prickly keel, upper 1. linear entire 
acuminate with a sagittate base, lower 1. pinnatifid, beak white 
twice as long as the fruit. — E. B. 797. — 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. Least Lettuce. E. 
2. L. virosa (L.) ; 1. with a prickly keel horizontal oblong 
auricled and clasping mucronate-dentate or sinuated, beak white 
equalling the black fruit. — E. B. 1957. — St. 2 — 4 feet high, leafy, 
branched above, panicled. Heads scattered with numerous cor- 
date acute bracts. Plant full of acrid milky juice. — Di-y banks. 
B. VII. VIII. Acrid Lettuce. ' E. S. 
3. L. Scariola (L.) ; 1. with a prickly keel perpendicular arrow- 
shaped at the base and clasjiing sinuate, beak white equalling 
the pale fruit. — E. B. 268. — St. 2 — 5 feet high, leafy, panicled. 
Heads scattered with numerous heartshaiied bracts. Juice rather 
less acrid than in the preceding. Waste places, rare. B. VII. 
VHI. Prickly Lettuce. E. 
** Beak short. 
4. L. muralis (DC.) ; florets 5, 1. with a smooth keel lyrate- 
runcinate angled and toothed clasping ; terminal lobe largest 
angled, beak much shorter than the fruit, heads panicled. — Pre- 
