142 LESSONS IN BOTANY. 
8. Stamens 8. Anthers turned inwards. Burmaniads. 
8. Stamens 8. Anthers turned outwards. * Irids. 
8. Stamens 6. * Amaryllids. 
9. Pistils many, distinct, achenia in fruit. * Water-plantains. 
9. Pistils 8, more or less united....10. 
10. Leaves verticillate, in 1 or 2 whorls. Stigmas 3, * Zrildiads. 
10. Leaves alternate ....11. 
11. Stigmas 8. Plants growing on other plants. Bromeliads. 
11. Stigmas united into one. * Spiderworts. 
12, Leaves net-veined, broad....18. 
12. Leaves parallel-veined....14. 
13. Flowers perfect, 4-parted. Proomia— Roxburgs. 
18. Flowers diecious, 6-parted. Greenbriers. 
14, Styles, and often the stigmas also, united into 1....15. 
14, Styles and stigmas 8, distinct....16. 
15. Flowers colored, regular. Stamens 6 (4 in one species). * Zilyworts. 
15. Flowers colored, irregular, or else 3-stamened. Pontederiads. 
15. Flowers greenish, glume-like, or scarious. * Rushes. 
16. Leaves rush-like. Ovary of three 1-seeded carpels, * Arrow-grasses. 
16. Leaves linear, lanceolate, &c. Ovary 6--seeded. * Melanths. 
17. Petals yellow, small, but showy. Leaves radical. Ayrids. 
17. Petals white, minute, fringed. Leaves radical. Pipeworts. 
G. Orpers or THE GRaAMINOIDS. 
Flower with a singie oract (giume). Stem solid. Sheaths entire, Sedges. 
Flower with several bracts (glumes and pales). Stem hollow. Sheaths 
split on one side. Grasses. 
187 
143 
140 
185 
