EXOGENOUS OR DICOTYLEDONOUS PLANTS. 



453 



880. Oi'd. Folcmor.iacecE (Polernonium Family). Herbs with alter- 

 nate or opposite leave?, and panicled, corymbose, or clustered flow- 



1021 1022 



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

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



1032 1030 



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 Polemor.ium. 1022. Cross-section of a magnified seed. 

 1023. Perpendicular section of the same 1024 Magnified embryo. 1025. Cross-section of the 

 dehiscent capsule of Collomia 1026, 1027. Capsule of Leptodactj Ion. 



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

 Pistil, in fruit, and calyx, enlarged 1030 Corolla and stamens. 1031. Same, laid open. 

 1032 A separate stamen, magaiaoi 1033. Sectiou u. the dahlscest capsule. 1034. A seed. 



