158 PBACTICAL BOTANY. 



371. Pistils entirely separate. Sepals, petals, and pistils 

 3-5 272 



Pistils 6, united below. Stamens 10. Fruit of 6, 

 beaked pods. Sepals and petals 5, the latter sometimes want- 

 ing. Leaves lanceolate. Flowers yellowish-green, loosely 

 spiked along the upper side of the naked branches of the 

 cyme. Fenthorum sedoides, L. (652). 



372. Stamens 3 or 4. Sepals, petals, and pistils as 

 many. Very small, tufted annuals, with opposite linear 

 leaves, and solitary, greenish-white, axillary flowers. 



Tilleea simplex, Nntt. 



Stamens 10 or 8. Sepals, petals, and pistils 4 or 5. 



Thick-leaved herbs. Flowers cymose, or 1 -sided. Ssdum. 



373. (79.) I. Corolla of 2, inversely heart-shaped petals. 

 Calyx tubular, with a disk, 2-lobed. Stamens 2. Style 1. 

 Pod 2-celled, with 1 seed in each cell, bristly with hooked 

 hairs. I Circsea. 



II. Corolla of 3 petals 274 



III. Corolla of 4 petals 275 



IV. Corolla of 5 or more petals 284 



374. Petals equal. Aquatics. Flowers dioecious, aris- 

 ing from sessile spathes 885 



Petals unequal (Orchids) 758 



375. I. Stamens 3 or 4 276 



II. Stamens 8 or 10 27* 



III. Stamens rarely fewer than 20. Styles 3-5, 

 united below. Pod 3- to 5-celled. Shrub with opposite 

 leaves. Flowers single, or few, at the end of the branches 

 white, showy. .54 



376. Leaves in several regular whorls. Galium (529). 

 Leaves alternate, or opposite, rarely clustered, or 



only apparently whorled at the summit 277 



377. Fruit a drupe, with a two-celled nut. Calyx 

 minutely 4-toothed. Stamens 4. Leaves mostly opposite, 

 entire, in one species alternate, in another crowded and ap- 

 parently whorled at the summit of the stem. Flowers small, 



