134 



LESSONS IN BOTANY 



25. Petals numerous, imbricate in the bud. 

 25. Petals 5, imbricate in bud. Leaves tubular. 

 25. Petals 5, convolute in bud. Flowers of 2 sorts 

 26. Petals 5, imbricate in bud. 

 26. Petals 4, usually crumpled in bud. 

 27. Filaments united into a tube. Anthers 1-celled 

 Sepals 2, persistent. Fruit a pyxis (§ 178). 



Sepals 3 to 5 29. 



29. Petals imbricate in bud. Fruit a long pod. South 

 20. Petals imbricate in bud. Fruit not a pod. 

 29. Petals convolute in bud. Fruit compound. 

 Stamens opposite to the imbricated petals. Pistil one. 

 Stamens alternate with the petals, or more numerous. 

 31. Stamens 6 (tetradynamous, § 108). Pods 2-celled. 

 31. Stamens 4, or 8-12. Pod 1-celled. 

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

 Sepals and petals in 4's. Stamens 8. Climbing. 



Sepals and petals in 5's 33. 



33. Stamens definitely 5 34. 



33. Stamens indefinite, 3-30 36 



34, 

 34 



Stems climbmg. 



Passion worts. 57 



89. 



Stamens monadelphou? 



Stamens distinct 35. 



35. Stem climbing. Flowers greenish. (Mexican tine.) Order 



35. Stem erect. Flowers yellow. Turnerworts. 



35. Stem erect. Flowers cyanic. * Sundews. 



86. Flowers perfect, very many and small. Rock-roses. 



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



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



37. Stamens 5, opposite to the 5 petals. Seed 1. {Leadwo7'ts.) Order 



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



37. Stamens 6-24 (twice as many as the petals), distinct. 



38. Ovary 1-celled. Leaves radical, spinous. S. 



38. Ovary 3-5-celled. Leaves mostly radical, dotless. 



38. Ovary 3-5-celled. Leaves cauline, dotted, pinnate. 



Style Ij but the carpels (§124)as many as the petals (2-6). 



Styles 2, carpels 2, fewer than the (5) petals 40. 



Styles 3-5 41. 



40. Seeds several. 

 40. Seeds two only. 



41. Sepals 2, with 5 petals. 

 41. Sepals as many as the petals. 

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

 42. Ovary compound, 8-carpeled, open before ripe. 



" Houseleeks. 



* Sundews. 



* Order 



Rucworts. 



* Onagrads. 



* Saxifrages. 

 *■ Ifmhelworls. 



* Purselanes. 



Araliads. 

 * Crowfoots. 

 Mignonettes. 



104 

 56 

 19 

 17 



112 

 30 

 80 

 32 

 60 

 19 

 73 

 37 

 52 



