EXOGENOUS OR DICOTYLEDONOUS PLANTS. 



187 



definite stamens, or nearly so, with innate anthers, and the gynrocium 

 of few apocarpous, free, and few-ovuled pistils ; the ovules chiefly on 

 the dorsal suture. Brasenia and Cabomba are all the genera. 



751. Ord. Sarmceniacca.' (Water-Pitcher Family). Perennial herbs, 

 growing in bogs ; the (purplish or yellowish-green) leaves all radical 

 and hollow, pitcher-shaped (Fig. 299, 300), or trumpet-shaped. 

 Calyx of five persistent sepals, with three small bracts at its base. 

 Corolla of five petals. Stamens numerous. Summit of the com- 

 bined styles very large and petaloid, five-angled, covering the five- 

 celled ovary, persistent. Fruit five-celled, five-valved, with a large 

 placenta projecting from the axis into the cells. Seeds numerous, 

 albuminous, with a small embryo. — Sarracenia, from which the 

 above character is taken, was the only known genus of the order, 

 until the recent discovery of Heliamphora in Guiana, which is apeta- 

 lous, its scape bearing several flowers ; as does that of a third genus, 



FIG. G81 Brasenia peltata (Water-shield) ; the lower flower with the floral envelopes and a 

 part of the stamens removed. C82 A magnified stamen. 683 A magnified carpel. 684. The 

 same, divided lengthwise, showing the ovules attached to the outer or dorsal suture ! C85 Sec- 

 tion of a carpel, in fruit 6S6. A magnified seed, with half the outer integument removed, 

 displa} ing at the upper extremity the bag which contains the embryo. 687. A magnified sec- 

 tion through the middle of the albumen, &c. ; bringing to view the minute embryo enclosed 

 in its 6ac, 1., ing outside of the albun-.en, which forms the principal built of the seed. 



