Leontodon. — Picris. 1051 
and transversely rugose, slightly tapering at the top, but seldom 
distinctly beaked. Pappus of about a dozen brown, feathery hairs, 
about as long as the achene, surrounded by 5 or 6 others not a 
quarter that length. — Flow. March to April. 
M. ma. M. p. N. d. N.f. N. v. D. 1. D. i. D. a. sept. Common 
throughout. 
Also known from Arabia Petraea, Syria and Mesopotamia. 
1469. (2.) Leontodon tuberosum IL. Spec. Plant. I (1753), 
p- 1123. — Thrincia tuberosa DC. Flor. France. IV, p. 52. — Boiss. 
Flor. Or. HI, p. 726. — Rechbch. Ic. XIX, tab. XIU fig. 1. — Apargia 
tuberosa Willd. Spec. Plant. HI, p. 1126. — Thrincia grumosa Brot. 
Flor. Lus. I, p. 325. — Thrincia tripolitania Sch. Bip. ap. Coss. in 
Bull. Soc. Bot. France XXII (1875), p. 48. — Aschers.-Schweinf. 
Ill. Flor. d’Eg., p. 98 no. 633. — A perennial plant, 10—25 cm high 
or sometimes somewhat more, more or less bristly with forked hairs; 
root-stock very short, praemorse, surrounded by a cluster of fusiform 
tubers. Leaves oblong-spathulate, dentate to lyrate or runcinate. 
Scapes l-headed; heads 2 cm long, 1,5 cm broad; scales of the in- 
volucre lanceolate, more or less hairy at the back; achenes muricate- 
wrinkled, the outer ones tapering, the inner ones a little longer than 
the beak. — Flow. March to April. 
M. ma. Mariut; Alexandria-West and -East. 
Also known from other parts of the Sahara region, Spain, Italy, Arabia 
Petraea and Palestine. 
611. (71.) Pieris Linn. 
Involucre of several nearly equal erect inner bracts, with 2 or 
3 rows of smaller outer ones, usually spreading. Receptacle without 
scales. Flowers all ligulate. Achenes transversely striate or muricate, 
not all or very shortly beaked. Pappus of whitish fine bristles, of 
which the inner ones at least are plumose. — Coarse hispid annuals. 
Leaves alternate, toothed. Flower heads in a loose irregular corymb. 
Flowers yellow. 
A genus containing but few species, natives of the temperate and sub- 
tropical regions of the northern hemisphere in the Old World. 
A. Pappus of all achenes equal. 
J), Achenesisvotgbegizad: }s. 2) defo sk 1. P.Sprengeriana. 
II. Achenes with beaks. 
a) Beaks one sixth the length of the achenes 2. P. strigosa. 
b) Beaks one fourth the length of the achenes 38. P. sulphurea. 
