Page:An introduction to physiological and systematical botany (1st edition).djvu/310

 280 Coccum of Gærtner, separated by him from capsules, is a dry seed-vessel, more or less aggregate, not solitary, whose sides are elastic, projecting the seeds with great force, as in Euphorbia; also Boronia, Tracts on Nat. History, t. 4—7. This seems by no means necessary to be esteemed otherwise than a sort of capsule.

2. Siliqua, a Pod, is a long dry solitary seed-vessel of two valves, separated by a linear receptacle, along each of whose edges the seeds are ranged alternately, as in the class Tetradynamia. See Cheiranthus, ''Engl. Bot. t. 462, and Cardamine, t. 80; also Bignonia echinata, figured by Gærtner, t. 52, f. 1, which, though cautiously called by him a capsula siliquosa only, is as true a Siliqua, according to his own definition, and every body's ideas, as possible; so is also that of Chelidonium''. He justly indeed names the fruit of Pæonia, capsula leguminosa, a follicle with him being a single-valved capsule, with the seeds marginal as in a legume.

Silicula, a Pouch, is only a Pod of a short or rounded figure, like Draba verna, ''Engl. Bot. t.'' 586.