178 
COMPOSITE. 
43. Picris Linn. 
1. P. hieracioidea (L.) ; rough with forked and hooked bristles,, 
1. lanceolate dentate or sinuated, upper 1. somewhat clasping, 
heads solitary terminating the stem and branches, outer involu- 
cral scales 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. 
44. Helminthia Juss. 
1. H. echioides (Gaert.) ; hispid with rigid 3-fid and hooked 
hairs from tubercular 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 prickles springing 
from white tubercles and with 3 minute hooks at the apex 
glochidate). L. clasping. — Dry banks. A. VII. — IX. Bristly 
Ox-tongue. 
Section 5. LACTUCEJE. Receptacle generally with out scales. 
Pappus 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 I. linear entire 
acuminate with a sagittate base, lower 1. pinnatifid, beaJc white 
twice as long as the fruit. — E. B. 707. — St. 2 feet high, slender, 
wavy, slightly branched. Heads in small alternate tufts form- 
ing long clusters. Florets yellow. — Chalky places and near the 
sea. 13. VII. VIII. Least Lettuce. E. 
2. L. virosa (L.) ; I. with a prickly keel horizontal oblong 
auricled and clasping mucronute- 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. — Dry banks. 
B. VII. VIII. Acrid Lettuce. E. S. 
3. L. Scariola (L.) ; I. with a prickly keel perpendicular arrow- 
shaped at the base and clasping sinuate, beak white equalling the 
pale fruit. — E. B. 268. — St. 2 — 5 feet high, leafy, panicled. 
Heads scattered with numerous heartshaped bracts. Juice rather 
less acrid than in the preceding. Waste places, rare. B. VII. 
VIII. 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- 
