VASCULAR PLANTS. 81 



perigonium 3-cleft; glands 0; ovary 3-locular; 

 styles 3, each 4-parted ; capsule 3-coccous, each 

 2-valved. x %. 



3. Euphorbia. L 



Moncecious. Androgynous. Flowers umbel- 

 late. Involucre campanulate. & flowers, per- 

 igonium 0; monandrous, stipitate, bracteate. 9 

 flower a single one, central in the umbel; per- 

 igonium dentate or 0; ovary 3-locular; styles 3, 

 each 2-cleft. . U . £ . 



Family XLIII. Callitrichaceae, (Of doubtful affinity.) 



Flowers axillary, 2-bracteolate. Perigonium 

 0. Monandrous. Ovary 4-locular; loculi 1-ovu- 

 late; ovule pendulous from the summit of the 

 loculus; styles 2, central. Fruit 4-lobed, 4-loc- 

 ular, 4-seeded. Capsule dehiscent. Leaves op- 

 posite; stipules 0. 



1- Callitriche, L. 



If . aquatic herbs. Only genus. 



ORDER XIV. MALVALES. 



Flowers regular. Calyx free, 5-parted, val- 

 vatein aestivation. Corolla 5-parted, contorted 

 in aestivation. ( Stamens often monadelphous. 

 Carpidia several, free, or connate with the cen- 

 tral axis into an oo-locular ovary. Leaves alter- 

 nate, stipulate. 



