Page:An introduction to physiological and systematical botany (1st edition).djvu/464

 434 of the calyx, 4, except in Phryma, which has a solitary seed.—Corolla monopetalous and irregular, a little inflated at the base, and holding honey, without any particular nectary. Stamens in 2 pairs, incurved, with the style between them, so that the impregnation rarely fails. The plants of this order are mostly aromatic, and none, I believe, poisonous. The calyx is either in 5 nearly equal segments, or 2-lipped. Most of the genera afford excellent essential characters, taken frequently from the corolla, or from some other part. Thus, Perilla has 2 styles, of which it is an unique example in this class.

Mentha a corolla whose segments are nearly equal, and spreading stamens. ''Engl. Bot. t.'' 446—8.

Lavandula the Lavender, and Westringia, Tracts on Natural History, 277, t. 3, have a corolla resupinata, reversed or laid on its back.

Teucrium a deeply divided upper lip, allowing the stamens and style to project between its lobes. ''Engl. Bot. t.'' 680.

Ajuga scarcely any upper lip at all, t. 77 and 489.