134 LESSONS IN BOTANY 
25. Petals numerous, imbricate in the bud. * Water Lilies. 
25, Petals 5, imbricate in bud. Leaves tubular. * Waler-pitchers. 
25. Petals 5, convolute in bud, Flowers of 2 sorts. Liock-roses. 
26. Petals 5, imbricate in bud. : * Purselanes. 
26. Petals 4, usually ernmpled in bud. “* Poppyworts. 
97. Filaments united into a tube. Anthers 1-celled. * Mallows. 
28. Sepals 2, persistent. Fruit a pyxis (§ 178). * Purselanes. 
28. Sepals 8 to 5....29. 
29, Petals imbricate in bud. Fruit along pod. South. Lnndenblooms. 
29, Petals imbricate in bud. Fruit not a pod. * Roseworts, 
29. Petals convolute in bud. Fruit compound. Loasads. 
80. Stamens opposite to the imbricated petals. Pistil one. * Berberids, 
80. Stamens alternate with the petals, or more numerous, * Crowfonts, 
31. Stamens 6 (tetradynamous, § 108). Pods 2-celled. * Crucifers. 
31. Stamens 4, or 8-12. Pod 1-celled. Cappurids, 
32. Sepals and petals in 3’s, Stamens 6. Small herbs. Limnanths. 
82. Sepals and petals in 4’s. Stamens 8. Climbing. * Indian Soupworts. 
82. Sepals and petals in 5’s....33. 
88. Stamens definitely 5....34. 
83, Stamens indefinite, 3-30....36 
84. Stamens monadelphous. Stems climbing. Passionworts. 
84, Stamens distinct....35. 
85. Stem climbing. Flowers greenish. (Mexican vine.) Order 
85. Stem erect. Flowers yellow. Turnerworts. 
85. Stem erect. Flowers cyanic. * Sundews. 
86. Flowers perfect, very many and small. Roch-roses. 
86. Fls. monecious. Plants woolly, seurty, or downy. Order 
87, Stamens 5, alternate with the 5 petals. Seeds many. * Flaxworts. 
87. Stamens 5, opposite to the 5 petals. Seed 1. (Leadworts.) Order 
87. Stamens 10 (twice as many as the petals), united at base. * Wood-sorrels. 
87. Stamens 6-24 (twice as many as the petals), distinct. * Houseleeks. 
88. Ovary 1-celled. Leaves radical, spinous. 8. * Sundews. 
88. Ovary 8-5-celled. Leaves mostly radical, dotless. * Order 
88. Ovary 8-5-celled. Leaves cauline, dotted, pinnate.  Rucworts. 
89. Style 1, but the carpels (§124)as many as the petals (2-6), * Onagrads. 
89. Styles 2, carpels 2, fewer than the (5) petals....40. 
89. Styles 8-5....41. 
40. Seeds several. * Savifrages, 
40. Seeds two only. * Uinbelworts. 
41. Sepals 2, with 5 petals, * Purselanes. 
41. Sepals as many as the petals. Araliads. 
42, Ovaries many or few, rarely 1, always simple. * Crowfoots. 
42, Ovary compound, 8-carpeled, open before ripe, Mignonettes, 
