LIST OF PLATES 



I. 



II. 



III. 



IV. 



V. 



VI. 



VII. 



VIII. 



IX. 



X. 



XI-XX. 



XXI. 



XXII. 



XXIII. 



XXIV. 



XXV. 



XXVI. 



XXVII. 



XXVIII. 



XXIX. 



XXX. 



XXXI-XXXV. 



XXXVI. 



XXXVII. 



XXXVIII. 



XXXIX. 



XL. 



XLI. 



XLII. 

 XLIII. 

 XLIV. 



XLV. 



SbeldoD, E. P. Polygonum rigidulum Sheld. 



Sheldon, E. f. Aster longulus Sheld. 



MacDougal, D, T. Hairs of Cypripedium 



Tilden, J. E. Elaters of Conocephalus. 



Tilden, J. E. Elaters of Conocephalus. 



Sheldon, E P. Laciniaria scariosa (L.) Hill, var 



corymbulo>a Sheld. 

 Anderson, A. P. A registering balance. 

 Frost, W. D. An electric auxanonieter. 

 Frost, W. T>. A time recorder. 

 Frost, W. D. Auxanometer and time recorder. 

 Anderson, A, P. Growth curves of Cucurbita pepo 



(Graphic method). 

 Fox, H, G. Distribution of Cypripedium in North 



America. (Map). 

 Fox, H. G. Cypripedium arietinum R. Br. 

 Cypripedium reginae Walt. 

 Cypripedium candidura Muhl. 

 Cypripedium hirsutum Mill. 

 Cypripedium parviflorum Salisb. 

 Cypripedium acaule Ait. 



Isopyrum biternatum. 

 Anatomy of Isopyrum biter- 



Fox, H. G. 



Fox, H. G. 



Fox, H. G. 



Fox, H, G. 



Fox, H. G. 



IVIacDougal, D. T. 



MacDougal, D. T. 

 natum. 



Sheldon, E. P. Scirpus lacustris Linn. var. tenui- 

 culmis Sheld. 



Tilden, J. E. Anatomy and development of Pilioia 

 diluta Wood and Stigeocloniun flagilliferum Kg. 



Kamaley, F. Anatomy of stem, anogra pallida, Gal- 

 pinsia hartwegii, Kneiffia fruticosa, Kneiffia glauca, 

 Kneiffia pumila, Megapterium missouriensis, Oenoth- 

 era humifusa. 



Ranialey, F. Anatomy of stem, Oenothera humifusa, 

 Oenothera rhombipetala, Oenothera biennis. 



Kamaley, F. Anatomy of steno, Onagra biennis. 



Holzinger, J.M. Hypnum cyclophyllotum Holzingkr. 



Day, R. N. Taraxacum, normal and inverted. 



Holzing-er, J. M. Coscinodon raui, C. vprightii and 

 C. wrightii var. brevis. 



Heller, A. A. Acrostiehum Helleri Underav. 



Heller, A. A. Gymnogramma sadlerioides Underav. 



Heller, A. A. Syntheriama Helleri Nash, 



Heller, A. A. Astelia menziesiana Sm. 



