298 LINNiEUS. 



order is Monogynia, or one pistil ; the second TH- 

 gynia, two pistils^ &c. But in the fourteenth class, 

 Didynamia, there are only two orders, Gymno- 

 spermia and Angiospermia, the former having 

 four naked seeds, the latter having the seeds en- 

 closed in a seed-vessel. In the fifteenth class, Te- 

 tradynamia, there are also two orders, Silicidosa, 

 in which the pod is short, and Siliquosa, in which 

 it is long. The orders of Monadelphia, Diadelphia, 

 and Polyadelphia, are formed from the number of 

 the stamina, and bear the names of Hexmidria 

 when there are six, Decandria when there are ten, 

 &c. The orders of the nineteenth class, Syngenesia, 

 are six. In the first, Polygamia cequalis, all the 

 flowers {or florets, as they are here called on account 

 of their small size, and because they are viewed as 

 components of a compound flower) have stamens 

 and pistils, and are equally fertile ; in the second, 

 Polygamia sKperfliia, the flowers of the centre have 

 stamens and pistils, those of the circumference pis- 

 tils only, but both kinds produce seeds ; in the third, 

 Polygamia frustranea, the flowers of the centre 

 have stamens and a pistil, and are fertile, those of 

 the circumference neutral, or furnished with a pistil, 

 but steril ; in the fourth, Polygamia necessaria, the 

 flowers of the centre have stamens and a pistil, but 

 are steril, in consequence of an imperfection in the 

 stigma, those of the circumference have a pistil, and 

 are fertile ; in the fifth, Polygamia segregata, all the 

 flowers are perfect, but each has a small calyx, and 

 tlie whole are contained within a common involucre; 

 and in the last order, Motiogamia, the flowers are 

 separated from each other. In Gynandria, the orders 

 are determined by the number of the stamens. In 



