14:2 LESSONS IN BOTANY. 



.8. Stamens 3, Anthers turned inwards. Burmaniads. 137 



8. Stamens 3. Anthers turned outwards. * Irids. 143 



8. Stamens 6. * Amaryllids. 140 



9. Pistils many, distinct, achenia in fruit. * Water-plantains. 137 



9. Pistils 3, more or less united.... 10. 



10. Leaves verticillate, in 1 or 2 whorls. Stigmas 3. * Trilliads. 14 



10. Leaves alternate 11. 



11. Stigmas 3. Plants growing on other plants. Bromeliads. \'] 



11. Stigmas united into one. ^ Spiderworts. 1;" 



12. Leaves net-veined, broad 13. 



12. Leaves parallel-veined. . . .14. 



13. Flowers perfect, 4-parted. Oroomia — Eoxburgs. 146 



13. Flowers dioecious, 6-parted. * Greenbriers. 136 



14. Styles, and often the stigmas also, united into 1 15. 



14. Styles and stigmas 3, distinct 16. 



15. Flowers colored, regular. Stamens 6 (4 in one species). *Lilywnrts. 148 



15. Flowers colored, irregular, or else 3-stamened. * Pontederiads. 135 



15. Flowers greenish, glume-like, or scarious. * Rushes. Inl 



16. Leaves rush-like. Ovary of three 1-seeded carpels. * Arrow-grasses. IZI 



16. Leaves linear, lanceolate, &c. Ovary 6- co-seeded. * Melanths. 149 



17. Petals yellow, small, but showy. Leaves radical. Xyrids. 153 



17. Petals white, minute, fringed. Leaves radical. Pipeworts. 154 



G. Orders of the Graminoids. 



Flower with a smgie oract (giume). Stem solid. Sheaths entire. Sedges 1 55 



Flower with several bracts (glumes and pales). Stem hollow. Sheaths 



split on one side. Gi'osset 156 



