PICEIS. — LACTUCA. 
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) ; 
(6) [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 
f than the preceding. B. 1 VI. E. S. I. 
*3. T. porrifolius (L.) ; iwv. longer than the flowers, ped. 
much thickened upwards, 1. tapering slightly dilated just above 
the base. — E. B. 638. — St. 3 — 4 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. 
Inv. usually A longer than the fl., sometimes only equalling or 
even falling short of them. Fl. pi^rple. Marginal fr. with 
scalelike tubercles throughout but particularly on the ribs. — 
Moist meadows. B. VI. Salsify. E. I. 
40. Pi'CRis Linn, em. Juss. 
1. P. hieracidides (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, fr. constricted just below the pappus. — E. B. 196. — St. 1 — 
3 feet high, divaricately branched above, irregularly corymbose, 
very rough. Florets yellow. — P. arvalis (.lord.) with branches 
ascending and heads m an umbellate corymb passes gradually 
into the type.— Dry banks. B. VII.— IX. E. 
41. Helmin'thia Juss. Ox-tongue. 
1. //. echio'ides (Gaert.) ; st. erect hispid with rigid 3-fid and 
hooked hairs from tubercular bases, phyll. 5 ovate-cordate. — 
E. B. 972. Picris (L.). — 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. E. I. 
E. Receptacle generally without scales. Pappus filiform, 
deciduous, never feathery, nor dilated at the base. Emit 
compressed. 
42. Lacto'ca Linn. Lettuce. 
* Beak long, white. Leaves with a bristly keel. 
1. L. salig'na (L.) ; upper I. linear entire acuminate with a 
sagittate base, lower 1. pinnatifid, beak twice as long as the fruit. 
