EXOGENOUS OR DICOTYLEDONOUS PLANTS. 



453 



880. Ord. PolemoniacciB {Polemonium Family). Herbs, with alter- 

 nate or opposite leaves, and panicled, corymbose, or clustered flow- 



1017 



1018 



lOSO 



1019 



ers. Calyx five-cleft. Corolla regular, with a five-lobed limb, con- 

 volute in ajstivatiou. Stamens five, inserted on the corolla alternate 



1031 



1032 



1030 



1029 



1033 1034 1058 



with its lobes, often unequal. Ovary free, three-celled, with a thick 



FIG. 1017. Flowers of Polemonium. 1018. Flowers of Phlox. 1019. Corolla of the same, 

 laid open, showing the stamens unequally inserted on its tube. 1020. Pistil of the same. 

 1021. Cross-section of the capsule of Polemonium. 1022. Cross-section of a magnified seed. 

 1023. Perpendicular section of the same. 1024. Magnified embrjo. 102.5. Cross-section of the 

 dehiscent capsule of CoUomia. 1026, 1027. Capsule of Leptodactylon. 



FIG. 1028. Pyxidanthera barbulata, of the Pine-barrens of New Jersey, natural size. 1029. 

 Pistil, in fruit, and calyx, enlarged. 1030. Corolla and stamens. 10.31. Same, laid open. 

 1032. A separate stamen, magnified. 1033. Section of the dehiscent capsule. 1034. A seed. 



