92 VASCULAR PLANTS. 



of the carpidia, 2 for each placenta, sometimes 

 united with the contiguous style. Fruit a cap- 

 sule crowned by the calyx margin and styles. 



1. Tricerastes, Presl 



Flowers $ . Calyx-tube 3-angled; margin 

 3-dentate. Stamens 3, alternate with the lobes 

 of the calyx; anthers extrorse. Ovary with 3 

 placentae; styles 3, 2-partecl, opposite the calyx- 

 teeth. U- 



Family LXII. Fr ankeniaceae • 



Flowers regular. Calyx gamophyllous, free, 

 tubular, costate, persistent. Petals alternate 

 with lobes of the calyx, unguiculate. Stamens 

 not correspondent in number to petals; anthers 

 extrorse. Ovary free, regular; style 1. Fruit 

 a capsule 1-locular, 3 — 4-valved, included in 

 the persistent calyx-tube. 



l. Frankenia, L- 



Characters of the order. 



U • leaves opposite ; stipules 0. 



Family lxiii. Violaceae. 



Sepals 5, persistent. Petals 5, unguiculate. 

 Stamens inserted into a hypogynous disk : fila- 

 ments flat; anthers short, introrse, pressed 

 against the ovary, the connective elongated be- 

 yond the anthers. Ovary free, 1-locular, form- 

 ed by 3 carpidia; ovules oo, bi-seriate: style 1, 



