134 LESSONS IN BOTANY 



25. Petals numerous, imbricate in the bud. * Water Lilies. 9 



25. Petals 5, imbricate in bud. Leaves tubular. * Water -pitchers. 10 



25. Petals 5, convolute in bud. Flowers of 2 sorts. * Hock-roses. 17 



26. Petals 5, imbricate in bud. * Purstlanes. 22 



26. Petals 4, usually crumpled in bud. * Poppy worts. 11 



27. Filaments united into a tube. Anthers 1-celled. * Mallows. 24 



2S. Sepals 2, persistent. Fruit a pyxis ( 178). *Purselanes. 22 



28. Sepals 3 to 5 29. 



29. Petals imbricate in bud. Fruit a long pod. South. * Linderiblooins. 26 



21'. Petals imbricate in bud. Fruit not a pod. * Roseworts. 47 



29. Petals convolute in bud. Fruit compound. Loasads. 58 



80. Stamens opposite to the imbricated petals. Pistil one. fierberids. 6 



SO. Stamens alternate with the petals, or more numerous. Crowfoots. 1 



31. Stamens 6 (tetradynamous, 108). Pods 2-celled. * Cruci/ert. 13 



31. Stamens 4, or 8-12. Pod 1-cclled. Capparids. 14 



32. Sepals and petals in 3's. Stamens 6. Small herbs. Limnantlis. 36 



32. Sepals and petals in 4's. Stamens 8. Climbing. * Indian Soapworts. 41 

 82. SepaJs and petals in 5's. . . .83. 

 33. Stamens definitely 5. . . .34. 

 83. Stamens indefinite, 8-30.... 36 



84. Stamens monadelphous. Stems climbing. * Passionuxirts. 60 



84. Stamens distinct 35. 



35. Stem climbing. Flowers greenish. * (Mexican vine.) Ordf.r 105 



35. Stem erect. Flowers yellow. Turnerworts. 56 



85. Stem erect. Flowers cyanic. * Sundews. 19 



36. Flowers perfect, very many and small. * Rock-roses. 17 



36. Fls. monoecious. Plants woolly, scurfy, or downy. Order 112 



87. Stamens 5, alternate with the 5 petals. Seeds many. * Flaxworts. 80 



87. Stamens 5, opposite to the 5 petals. Seed I. (Leadwortn.) * Order 80 



87. Stamens 10 (twice as many as the petals), united at base. * Wood-sorrels. 32 



87. Stamens 6-24 (twice as many as the petals), distinct. * Jlouseleeks. 66 



88. Ovary 1-celled. Leaves radical, spinotis. S. * Sundews. 19 



88. Ovary 3-5-celled. Leaves mostly radical, dotless. * Order 73 



38. Ovary 3^5-cellcd. Leaves cauline, dotted, pinnate. Ruaworts. 37 



89. Style 1, but the carpels (124)as many as the petals (2-6). * Onagrads. 52 



89. Styles 2, carpels 2, fewer than the (o) petals 40. 



89. Styles 8-5.... 41. 



40. Seeds several. * Saxifrage*. 57 



40. Seeds two only. * Umbelworts. 63 



41. Sepals 2, with 5 petals. * Purselanes. 22 



41. Sepals as many as the petals. * Araliaits. 65 



42. Ovaries many or few, rarely 1, always simple. * Crowfoots. 1 



42. Ovary compound, 8-carpdcd, open before ripo. Mignonettes. 1.1 



