CLASS XIV. ORDER I.J PRUNELLA. 829 



Corolla small, its tube straight, swollen towards the base, and the throat 

 dilated, pale pink, downy, upper lip arched, concave, three lobed, the 

 middle one largest and notched, the lower obtusely three lobed and 

 spreading. Stamens curved beneath the upper lip. Seeds small, 

 rough, brown. 



Habitat. Moist heathy places, and the side of ditches, general ; 

 but less common than the preceding. 



Perennial ; flowering in July and August. 



GENUS XVIII. PRUNEL-LA LINN. Self-heal 

 Nat. Ord. LABIAT'EJE. Juss. 



GEN. CHAR. Calyx two lipped, closed after flowering, the upper one 

 flat, three toothed, the lower narrower, bilid. Corolla with the 

 upper lip concave, nearly entire, the lower of three obtuse lobes. 

 Name from the German Braiine, quinsy; called by some authors 

 Brunella, and changed by Linnaeus to the present. 



1. P. vulga'ris, Linn. (Fig. 958 ) Self-heal. Filaments terminating in 

 a spinous tooth ; calyx with the upper lip broad, truncated, the teeth 

 small, mucronated, the lower of two lanceolate ciliated leaves, oblong, 

 ovate, entire, toothed or waved, petiolated ; flowers purple. 



English Botany, t. 961. English Flora, vol. iii. p. 115. Hooker, 

 British Flora, ed. 4. vol. i. p. 235. Lindley, Synopsis, p. 206. 



/3. alba. Flowers and bracteas white. 



Root of numerous short black fibres, and with somewhat creeping 

 branches. Stem erect, about a foot high, square, smooth or downy on 

 the opposite alternate sides, simple or branched at the base. Leaves 

 distant, petiolated, ovate oblong, eutire, slightly toothed or waved on 

 the margin, more or less hairy, paler beneath. Inflorescence an oblong 

 terminal crowded whorled spike, having at the base of the spike a pair 

 of sessile leaves, and of each whorl a pair of broad obtuse or acute 

 bracteas, reticulated with veins, and mostly tinged of a purple colour. 

 Calyx nearly sessile, with a narrow veiny hairy tube, the upper lip 

 flat, broad, truncated, the teeth very small, bristly, the lower lip of two 

 deeply cleft lanceolate awl-shaped teeth, mostly ciliated. Corolla of 

 a deep purplish blue, the tube cylindrical, dilated in the throat, upper 

 lip oblong, concave, entire or notched, the lower three lobed, the 

 middle lobe largest, broadest, and mostly crenated. Stamens curved 

 beneath the upper lip, the filaments with a tooth below the roundish 

 two valved anther. Seeds ovate, brown, contained in the closed dry 

 reticulated calyx. 



Habitat. Moist places, barren pastures, &c., common. . alba t 

 rare ; near Worksop, Nottinghamshire. 



Perennial; flowering in July and August. 



5 P 



