SPECIES AND VARIETIES. 257 



ones erect, 6-8 inches high; radical leaves on long stalks, 

 ovate, entire, the stem-leaves few, mostly pinnate, with a large 

 oval or oblong terminal segment ; flowers small, pale rose, in 

 terminal corymbs, mostly unisexual, the corolla tube short. 

 Boggy meadows. Fl. June. 



** Leaves all pinnate. 



V. officinalis : stems erect, 24 feet high, nearly simple, 

 hairy at the base ; leaves pinnate, with 921 or more large, 

 lanceolate segments, with a few coarse teeth ; flowers small, 

 white or tinged with pink, in broad terminal corymbs. All- 

 heal. Damp woods, sides of ditches and streams, etc Fl. 

 June. 



(143) DipsacilS. TEASEL. 



D. sylvestris : biennial ; stems erect, 4-5 feet high, prickly, 

 as well as the midribs, peduncles, and involucres ; leaves ses- 

 sile, long, lanceolate, entire or coarsely-toothed, the upper 

 ones broadly-connate at the base ; heads of flowers . at first 

 ovoid, but gradually becoming cylindrical, nearly three inches 

 long, the involucre of 8-12 long, unequal, stiff, linear, prickly 

 bracts, usually curved upwards ; flowers pale lilac. Roadsides 

 and waste places. Fl. July. 



The Fullers' Teasel ( D. fullonum] is believed to be a culti- 

 vated variety, differing only in the scales of the receptacle 

 being hooked. 



D. pilosus : biennial ; stems 2-4 feet high, branching, with 

 stiff spreading hairs or bristles ; leaves with a large ovate 

 coarsely-toothed terminal segment, and 12 pairs of smaller 

 ones -, flowers white, forming globular, hispid heads, barely an 

 inch in diameter, on long peduncles. Moist hedges, thickets, 

 and banks. Fl. August. 



