TETRAND. MONOG. 49 



seeded. [Floioers 2, on a sj)adix arising from the sheathing 

 bases of the leaves, which perform the office of a spatha.) 

 (Cerastium tetrandnim, Decandr. Pentag.) 



]. MONOGYNIA. 



1. DIPSACUS. 



1. D. Vallonmn (Fuller's Teasel), leaves subconnate, scales 

 of the receptacle hooked at the extremity, involucres spreading 

 (rcilexed, S?/i.). Lighff. p. \\3. E.'B. t.20S0. 



Hab. Rude uncultivated places, as at Lord Elgin's lime-works, near 

 Dunfermling, &c., Lighff. Fields near Cathcart and Langside, 

 Glasgow, Hopk. Fl. 2\x\y, Aug. ^ . 



Stem 4 — 5 feet high, very angidar, and prickly. Leaveslarge, oblong 

 or oblongo-lanceolate, obtusely and irregularly serrated, sometimes, 

 especially the upper ones, connate. Involucre spreading, about 

 as long as the head of flowers. Flowers in oval heads, pale purple 

 or whitish. — Used in dressing cloth, for which purpose the hooked 

 scales of the receptacle are admirably calculated. 



2. D. sylvestris {wild Teasel), leaves opposite rarely connate, 

 scales of the receptacle straight, involucres curved upward. 

 E.B. t. 1032. 



Hab. Inch Colm, near Edinb., Maugh. Fl. July, rj . 



The more slender habit, the leaves not or scarcely ever connate, in- 

 volucre not spreading, and the scales of the recejitacle being straight, 

 are the principal marks which serve to distinguish this from tlie pre- 

 ceding. 



3. D. pilnsus (small Teasel), leaves petiolate with a small leaflet 

 at the base on each side, involucres short deflexed. Liahtf. 

 p. 113. £. B. t.S77. 



Hab. Moist hedges, but not common. Light/. FZ. Aug. Sept. ^. 



Stem slender, 2 — 4 feet high, angular, rough with short inflexed 

 prickles, longer, and resembling bristles, on the peduncles. Leaves 

 ovato-acuminate, serrated, eared at the base. Hauls of flowers 

 smallish, round, hairy. 6'ca?es straight, blossoms white. Anthers 

 white, much protruded. 



2. SCABIOSA. 



1. S. succisa (Devll's-lit Scabious), corollas 4-cleft their seg- 

 ments equal, cauline leaves subdentate, heads of flowers nearly 

 globose. Light/, p. 114, E. B. I. 87S. 



Hab. Meadows and pastures, common. F/. July, Aug. 1/. 



Root as it were cut oft" abruptly, or hxitzn (radix prccmorsa). Stems 

 nearly simple. Leaves hairy, rather stiff" j radical ones ovate, mostly 

 petiolate ; those of the stem oblong. Flowers purplish blue. . 



2. S. arvejisis (Field Scabious), covo\la.s 4-cleft radiating, stem 

 hispid branched, stem-leaves pinnatifid (often) cut. Light/. 

 p. 114. £. i;. ^G59. 



