DIDYNAMIA— GYMNOSPERMIA. Ajuga. 65 



the upper side, the 2 intermediate ones being shortest, 

 and ail of them parallel, rarely longer than the corolla, 

 their upper half usually incurved. Anthers oblong, at- 

 tached by the back, converging in pairs, generally shel- 

 tered by the upper lip, but sometimes quite exposed. 



Germeii superior, 4-lobed; style solitary, central, thread- 

 shaped, situated between the stamens, and curved in the 

 same direction, being of an intermediate length between 

 the longer and shorter ones ; stigma usually cloven and 

 divaricated, sometimes undivided, or slightl}' notched. 



Seeds 4, lodged in the bottom of the calyx, which is their 

 only covering, and serves instead of a seed-vessel. Each 

 seed has a double integument, a testa and a memhrajia, 

 both of them very thin, generally smooth. See observa- 

 tions on the Asperifolicje, vol. i. 248. 



AH the plants of the Didynamia Gymnospermia are herba- 

 ceous, or slightly shrubby, never arborescent. Their 

 stems are quadrangular, branched, and leafy. Leaves op- 

 posite, entire or serrated, in a few instances much di- 

 vided. Flo'wers stalked, axillary, either solitary, or in 

 dense tufts constituting w/zor^S; their colour reddish, pur- 

 plish, blue, white, or yellow. Qualities aromatic, or bit- 

 ter, in every instance harmless. The Jlotvers are rarely 

 so fragrant as the herbage, though sometimes exhaling 

 a slight odour, peculiar to themselves. Round pellucid 

 spots, in the leaves or calyx more especially, are the seat 

 of an aromatic essential oil. The pubescence of the herb- 

 age, in many species, exudes a similar, or more viscid, 

 or a bitter secretion. In growing parts, attacked by in- 

 sects for the lodgment of their eggs, these secretions are 

 changed to acid or astringent ones, 



283. AJUGA. Bugle. 



Linn. Gen. 287. Fl. Br. 604." Lam. t. 501. 



Bugula. Town. t. 98. Juss. 112. 



Chamaepitys. Tourn. t. 98. 



Cal. divided about half way down into 5, nearly equal seg- 

 ments, permanent. Cor. ringent; tube sometimes inflated 

 at the base, not quite straight; upper lip very short, erect, 

 abrupt, notched; longer large, spreading, 3-lobed; the 

 central lobe either undivided or inversely heart-shaped ; 

 lateral ones small. Filam. longer than the upper lip, short- 

 er than the lower, incurved. Germcji superior, of 4 round 

 lobes. Style incurved. Stigiua in 2 acute, spreading seg- 



VOL. III. F 



