138 



LESSONS IN BOTANY. 



U. Herbs. Ovary .with 5 styles and but 1 seed. * Leadworts. 80 



14. Herbs. Ovary with 1 style and many seeds. . ' * PrimworU. 78 



14. 'Shrubs, .trees. Ovary 1-styled, 5-cell«d, 1-seeded. Soapworts. 11 



15. Style none. Drupe 4-6-seeded. EdWywortt. 74 



15. Style one. Drupe 4-seeded. Vervains. 88 



15. Style one. Capsule S-S-celled, many-seeded. * JTeathworts. 73 



16, Ovary 1, deeply 4-parted or 4-partible, forming 4 aohenia. * Borrageworts. 90 



16. Ovaries 2, distinct, often covered by the stamens.... 18. 



16. Ovary 1, compound.... 17. 



17. Ovary 1-celled 20.' 



17. Ovary 2-6-oelled 22. 



18. gtigmas united or connate. ..19. , 



18. Stigmas distinct. Flowers minute, yellow * Bindweede. 9S 



19^ Flower-bud with convolute pieces. * Dogbanes. 96 



19. Flower-bud with valvate pieces. * Asdepiads. 97 



20. Seeds several .... 21. 



20. Seed one. Corolla limb entire. * Order 101 



21. Leaves cleft and lobed. * UydrophyUs. 91 



21. Leaves or leaflets entire. * QenUanworts. 95 



22. Leaves opposite.. ..24 

 22. Leaves alternate .... 24. 



23. Ovary 2-eelled. * 



23. Ovary 3-celled. Plants not twining 1 



24. Ovary 3-oelled. .PJants not twining. ) 

 24. Ovary 2-celled, 2-6-seeded. Tvi-ining 

 24. Ovary 2-celled, 4^seeded. Stem erect. 

 24. Ovary 2-celled, many-seeded.. ..25. 

 -25. Styles 2. 

 25. Style one. 

 26. Herbs. Corolla 4-parted, dry, scarious. Ribworts. 



-26. Shrubs 27. . 



27. Corolla 5-parted, imbricate in bud. 

 27. Corolla 4-parted, valvate or none. 



28. Ovary deeply 4-parted, forming 4 (or fewer) achenia 29. 



28. Ovary entire, of one piece 30. ' , 



29. Leaves opposite. Stems square. "* Labiates. 



29. Leaves alternate. Stems round. * Borrageworts, 



30. Ovary wijh 4 or fewer seeds. Leaves opposite. Vervains. 



30. Ovary with many seeds, or more than 4 81. 



31. Trees or climbing shrubs. Seeds winged. * Bignoniads. 83 

 81. Trees. Seeds wingless. * PaiAownia,^ Onier 86 



81. Erect shrubs. Seeds wingless. * Heatkworls. 78 



81. Herbs 32. 



* Logwniads. 



* PhloxiDorts. 



* Bindweeds. 



* Borrageworts. ■ 



* Bydrophylis. 



85 

 92 



98 

 90 



91 

 94 

 79 



Jasmmeworts. 98 



90 



87 



