﻿BIBLIOGRAPHY. 



*55 



1G7C Treub, M. Kecherches sur lesCycadees. Embry- 

 ogeniedu Cycas circinalis. Ibid., vol. iv, Leide, 

 1884, pp. i-ii, pi. i-iii. 



t68. Tyson, Philip. Report, State Agricultural Chemist 

 to the House of Delegatesof Maryland. Annap- 

 olis, 1S60. 



169. Van Tieghem, Ph. Recherches sur la symetrie de 



structure des Plantes Vasculaires. Ann. Sci. 

 Nat, Botanique, 5e ser., vol. xill, pp. 5-314, pi. 

 iii-viii. (Cycadees, pp. 204-211.) 

 i6g«. Walch, Ernst Immanuel. Die Naturgeschichte 

 der Versteinerungen zur Erlauterungder Knor- 

 rischen Samlung von Merkwiirdigkeiten der 

 Natur. Niirnberg, Erster Theil, 1773; Zweyter 

 Theil, Erster Abschnitt, 1768, Zweyter Ab- 

 schnitt, 1769; Dritter Theil, 1771; Vierter 

 Theil, 1773. When preceded by a fascicle of 

 36 pp. by Knorr (Niirnberg, 1755), and accom- 

 panied by a separate atlas, known as Knorr and 

 Walch. 



170. Ward, Lester F. Fossil Cycadean Trunks of North 



America, with a Revision of the Genus Cyca- 

 deoidea Buckland. Proc. Biol. Soc. Washing- 

 ton, vol. ix, Washington, Apr. 9, 1894, pp. 75-87. 



171. The Cretaceous Rim of the Black Hills. 



Journal of Geology, vol. 11, Chicago, April- 

 May, 1894, pp. 250-266. 



172. Recent Discoveries of Cycadean Trunks in 



the Potomac Formation of Maryland. Bull. 

 Torr. Bot. Club, vol. xxi, No. 7, New York, 

 July 20, 1894, pp. 291-299. 



173. Some Analogies in the Lower Cretaceous of 



Europe and America. Sixteenth Annual Re- 

 port of the U. S. Geological Survey, Pt. I, 

 Washington, 1896, pp. 463-542, pi. xcvii-cvii. 



174. Descriptions of the Species of Cycadeoidea, 



or Fossil Cycadean Trunks, thus far discovered 

 in the Iron Ore Belt, Potomac Formation, of 

 Maryland. Proc. Biol. Soc. Washington, vol.xi. 

 Washington, March 13, 1S97, PP- I-I 7- 



175. Descriptions of the Species of Cycadeoidea, 



or Fossil Cycadean Trunks, thus far determined 

 from the Lower Cretaceous Rim of the Black 

 Hills. Proc. U. S. Nat. Museum, vol. xxi, 

 Washington, 1898, pp. 195-229. 



176. The Cretaceous Formation of the Black Hills 



as indicated by the Fossil Plants (with the col- 

 laboration of Walter P. Jenney, Wm. M. Fon- 

 taine, and F. H. Knowlton). Nineteenth Ann. 

 Rep. U. S. Geol. Survey, Pt. II, Washington, 

 1S99, pp. 521-958, pi. lvii-clxxii. 



177. Description of a New Genus and Twenty 



New Species of Fossil Cycadean Trunks from 

 the Jurassic of Wyoming. Proc. Washington 

 Acad. Sci., vol. 1, Washington, Feb. 14, 1900, 

 PP- 253-300- 



r 7 8 - Status of the Mesozoic Floras of the United 



States. First Paper : The Older Mesozoic. 



Twentieth Annual Report of the U. S. Geol. 



Survey, Pt. II, Washington, 1900, pp. 211- 



748, pi. xxi-clxxix. 

 r 79- Elaboration of the Fossil Cycads in the Yale 



Museum. Am. Jour. Sci., 4 th sen, vol. x, 



New Haven, Nov., 1900, pp. 327-345, pi. ii-iv. 

 l8 °- A Famous Fossil Cycad. Am. Jour. Sci., 



4th ser., vol. xviii, New Haven, July, 1904, pp. 



40-52. 



iSoir. Status of the Mesozoic Floras of the United 



States, Second Paper. Monographs of the U. 

 S. Geological Survey, vol. xlviii. Part I, Text ; 

 Part II, Plates. Washington, 1905. 



181. Warming, E. BidragtilCycadeernesNaturhistorie. 

 Contributions a l'histoire naturelle des Cyca- 

 dees, 1S79. 



lS2 - A Handbook of Systematic Botany, with a 



revision of the Fungi by Dr. E. Knoblauch. 

 Translated and edited by M. C. Potter, Lon- 

 don, 1895. 



1S3. Webber, Herbert J. Peculiar Structures occur- 

 ring in the Pollen Tube of Zamia. Botanical 

 Gazette, vol. xxm, Chicago, June, 1S97, pp. 453- 

 459, pi. xl. 



x 84- The Development of the Antherozoids of 



Zamia. Botanical Gazette, vol. xxiv, Chicago, 

 July, 1S97, pp. 16-22. 



185- Notes on the Fecundation of Zamia and the 



Pollen Tube Apparatus of Ginkgo. Botanical 

 Gazette, vol. xxiv, Chicago, October, 1897, PP- 

 225-235, pi. x. 



1S6. Spermatogenesis and Fecundation of Zamia, 



U. S. Dept. of Agric, Bureau of Plant Industry. 

 Bull. No. 2, Washington, December 28, 1901. 



i86<f. White, David. The Seeds of Aneimites. Smith- 

 sonian Miscellaneous Collections, Quarterly 

 Issue, vol. xlvii, Part III, Washington, Dec. 10, 

 1904, pp. 322-331, pi. xlvii-xlviii. 



186A. Fossil Plants of the Group Cycadotilices. 



Smithsonian Miscellaneous Collections, vol. 

 xlvii, Part III, Washington, March 2, 1905, 

 PP- 377-390, pi. liii-lv. 



187. Wieland, G. R. A Study of Some American Fos- 

 sil Cycads. Pt. I. The Male Flower of Cyca- 

 deoidea. Am. Joum. Sci., 4th ser., vol. vn, 

 New Haven, March, 1S99, pp. 219-226, pi. ii-iv. 



188. A Study of Some American Fossil Cycads. 



Pt. II. The Leaf Structure of Cycadeoidea. 

 Ibid., April, 1899, pp. 305-308, pi. vii. 



1S9. A Study of American Fossil Cycads. Pt. HI. 



The Female Fructification of Cycadeoidea. 

 Ibid., May, 1899, pp. 383-391, pi. viii-x. 



190. Cycadean Monoecism. Ibid., vol. vm, New 



Haven, August, 1S99, p. 164. 



