454 GYMNOSPERMS 



171. DoRETY, Helen A. (Sister Helen Angela), Diagrams in Coulter and 

 Chamberlain's Morphology of Gymnosperms. igi7. 



172. ,EmhTyo andseedlingoi Dioou spinulosum. Bot. Gazette 67: 251- 



58. 1919. 



173. Downie, Dorothy G., The male gametophyte of Microcycas calocoma. 

 Bot. Gazette 85:437-50. pis. IQ-21. 1928. 



174. Doyle, J., Note on the structure of the ovule of Ltiri.v leptolepis. Ann. 

 Botany 30: 193-95. 1916. 



175. Duchartre, p. E., Memoire sur les embryons qui ont ete decrits comme 

 polycotyles. Ann. Sci. Nat. Bot. HI. 10:207-37. pis. 7-10. 1848. 



176. DuPLER, A. W., The gametophytes of Taxus canadensis Marsh. Bot. 

 Gazette 64 : II 5-36. pis. 11-14. 1917. 



177. , The staminate strobilus of Taxus canadensis. Bot. Gazette 68: 



345-66. pis. 24-26. 1919. 



178. , Ovuliferous structures of Taxus canadensis. Bot. Gazette 69: 492- 



520. pi. 23. 1920. 



179. Duthie, Augusta V., Anatomy of Gnetum africanum. Ann. Botany 26: 

 593-602. pis. 3. 191 2. 



180. Eames, a. J., The gametophytes of the Kauri. Science N. S. 35:160. 

 1912. 



181. , The morphology of Agathis auslralis. Ann. Botany 27: 1-38. pis. 



1-4. 1913. 



182. Eames, A. J., and MacDaniels, L. H., An introduction to Plant Anato- 

 my. McGraw-Hill Book. Co. 1925. 



183. EiCHLER, A. W., Ueber Welwitschia mirabilis, etc. Flora 47:459-64. 473- 

 79, 489-96, 508-10- 513-20. 1863. 



184. ■, Sind die Coniferen Gymnospermen oder nicht? Flora 56:241-47. 



260-72. 1873. 



185. , Coniferae in Engler und Prantl's Die Natiirlichen I'flanzenfami- 



lien 2:108. 1889. 



186. Elkins, M. G., and Wieland, G. R., Cordaitean wood from the Indiana 

 black shale. Amer. Jour. Sci. 38:65-78. pis. i, 2. 1914- 



187. Englemann, G., Morphology of the carpellary scales of Coniferae. Amer. 

 Jour. Sci. HI. 12:469, 470. 1876. 



188. Engler, A., Gymnospermae (Geographic distribution) in Engler and 

 Prantl's Die natiirlichen Pflanzenfamilien. 2d. cd. 1926. 



189. Engler and Prantl, Die natiirlichen Pflanzenfamilien. 2d ed. 13: 1-447. 

 jigs. 240. 1926. 



190. Enrico, C. V., Contribuzione alia conoscenza dcUa morphologia e dello 

 sviluppo del fascio vascolare della foglie delle Cicadacee. Annales di Bot. 

 1:109-21. pis. 8, Q. 1903. 



191. Fankhauser, J., Entwickelung des Stengels und Blattcs von Ginkgo. 

 Bern. 1882. 



