236 
Composite. 
— Outer invol.-ls lanceolate or oval-lanceolate, spreading 
or loosely erect, the inner ones gen. with a callosity 
or little horn below the tip. Ls gen. more finely div. 
than in the last. Heads smaller; fls paler. Achenes of 
an olive-gray or (more often) brownish red (T. erythro- 
spermum auct. not Andrz ).—Dry pasturages; not every¬ 
where. 4. rarely in autumn . . Isevigatum Dec. 1320. 
349. Chondrilla. Chondrilla. XIX, 19. 1 
1. Heads small, in a very loose spike-shaped raceme. Rad. 
ls runcinate, withered at the time of flowering, the upper 
linear-lanceolate or linear. Stem 4—10 dm. —b. rigens 
Rchb. Upper ls oblong-lanceolate, with spiny bristles at 
the edges and underneath on the middle nerve.—Dry 
hills, sandy places in the warmer parts of Switz.; (want¬ 
ing in G. U. A.), b. W. 6 juncea L. 1321. 
— Heads of moderate size, arranged in a corymb. Ls glabr., 
mostly rad., obovate-lanceolate, toothed with distant teeth, 
the caul, linear. Stem 2—3 dm, Gravel of alpine torrents; 
Graub., St. Gall. (Rhine, Plessur, Landquart). 7 
prenanthoides Vill. 1322. 
350. Prenanthes. Prenanthes. XIX, 15. 
1. Ls glabr., glaucous underneath; the caul, oblong-lanceo¬ 
late, with cordate-clasping base. Fls purple.—b . tetwi- 
folia L. Ls narrow, almost linear.—Woods; distrib. 
- b. Tess., Graub. 7 . . . . purpurea L. 1323. 
351. Laciuca. Lettuce. XIX, 20. j 
1. Fls blue. Perenn. pi.—Stony slopes; scattered (wanting 
in IT. L. A.). 5. 6 . . . . perennis L. 1324. 
— Fls yellow, sometimes tinged with pale violet under¬ 
neath. Ann. or bienn. pis . .... 2 
2. Most of the caul, ls linear, entire, with sagittate base 
and pointed auricles, spreading. Heads almost sessile, 
in spike-shaped racemes on long branches.—Stubble¬ 
fields; western Switz. as far as Aargau. 7 
saligna L. 1325. 
— Caul, ls never linear, entire, oblong or oblong-obovate 
or runcinate-pinnatifid. Heads peduncled, gen. in a pyra¬ 
midal panicle . . . . . . . 3 
3. Achenes blackish, rather ' broadly edged (winged), glabr. 
Ls horizontal (with the faces turned upwards and down¬ 
wards), gen. entire Stem 1—2 in. L. flavida Jord. Rent. 
—Stony places, rubbish-heaps; rare: W. Y. J. Z. 9 
virosa L. 1326. 
— Achenes brownish gray, very narrowly edged, rough 
with short bristles at the top ... -I 
