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Botanieal 



(Basette 



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Edited by John M. Coulter and Charles R. Barnes, with tiie assistance of other members of the 



botanical staff of the University of Chicago. 



Vol. XLIV, No. J 



Issued July 20, 1 907 



CONTENTS 



■ 



HYBRIDIZATION AND GERM CELLS OF OENOTHERA MUTANTS. Contributions 



FROM THE Hull Botanical Laboratory. XCIIL Reginald Ruggles Gates - - i 



MORPHOLOGICAL AND ANATOMICAL STUDIES OF THE VEGETATIVE ORGANS 



OF RHEXIA (with plates i and ii). Theo. Holm - - . -, - - - 22 



THE SPORANGIUiM OF THE OPHIOGLOSSALES. Contributions from the Hull 



Botanical Laboratory. XCIV (with plates hi and iv). Z. Z. Burlingame - - 34 



THE ROOTS OF LYCOPODIUM PITHYOIDES. Contributions from the Hull Bo- 

 tanical Laboratory. XCV (with plates v and vi and one figure). Mma G. Stokey 57 



BRIEFER ARTICLES 



The Black-fruited Crataegus of Western North America. C. S. Sargent - - 64 



CURRENT LITERATURE 



MINQR NOTICES * •- - -67 



NOTES FOR STUDENTS - - ' - - - - - 69 



NEWS - 79 



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