636 LIST OP WOEKS 



Webber, H. J. (01) Spermatogenesis and fecundation of Zamia. U. S. 



Dpt. Agric. Bur. Plant Industry, Bull. No. ii. 

 Weiss, C. B. (72) FossUe Flora der jiingsten Steinkohlen-formation imd 



des RothUegenden im Saar-Rhein-Gebiet. Bonn, 1869-72. 



(74) Note in Zeitsch. Deutseh. Geol. Oes. Bd. xxvi. p. 616. 



(79) Die Flora des RothUegenden von Wunschendorf bei Lauban 



in Schlesien. Abh. geol. specialkarte von Preussen Bd. m. Heft i. 

 p. 1. 



Weiss, F. E. (12) Report of the 80th meeting (Portsmouth) of the 

 British Assoc, for the Advancement of Science, p. 550. 



(13) The root- apex and young root of Lyginodendron. Mem. 



Proc. Manchester Lit. Phil. Soc. vol. Lvn. pt. ui. 



(13^) A Tylodendron-bke fossil. Ibid. vol. Lvn. pt. iii. 



Wernham, H. F. (11) Floral Evolution; with particular reference to 



the sympetalous Dicotyledons. New Phyt. voL x. p. 73. 



Wettstein, R. V. (90) Die Omorika-Fichte, Picea omorica (Pane). 



Sitzber. K. Akad. Wiss. Wien, Bd. xcvm. Abt. i. p. 503. 



(11) Handbuch der systematischen Botanit. (Edit, ii.) Leipzig. 



Wherry, E. T. (12) Silicified wood from the Triassic of Pennsylvania. 



Proc. Acad. Sci. Philadelphia, vol. Lxiv. pt. ii. p. 366. 

 White, D. (90) On Cretaceous Plants from Martha's Vineyard. Amer. 

 ■Jotirn. Sci. vol. xxxix. p. 93. 



(01) The Canadian species of the genus Whittleseya and the 



systematic relations. The Ottawa Naturalist, vol. XV. No. iv. p. 98. 



White, D. and C. Schuchert. (98) Cretaceous series of the West coast 

 of Greenland. Bull. Oeol. Soc. America, vol. ix. p. 343. 



Wieland, G. R. (99) A study of some American PossU Cycads. Pt. ii. 

 The Leaf structure of Cycadeoidea. Amer. Journ. Sci. vol. vn. 

 p. 305. 



(02) Notes on living Cycads. I. On the Zamias of Florida. 



Ibid. vol. xm. p. 331. 



(06) American Fossil Cycads. Washington. 



(08) Historic Fossil Cycads. Amer. Journ. Sci. vol. xxv. p. 93. 



(08^) Two new Araucarias from the Western Cretaceous. Oeol. 



Surv. South Dakota. 



(09) The WilUamsonias of the Mixteoa Alta. But. Gaz. vol. XLvm. 



p. 427. 



(11) On the WUliamsonia Tribe. Amer. Jotirn. Sci. vol. xxxn. 



p. 433. 



(11^) A study of some American Fossil Cycads. Pt. v. Ibid. 



vol. xxxn. p. 133. 



(12) Ibid. pt. vi. On the smaller flower-buds of Cycadeoidea. 



Ibid. vol. xxxm. p. 73. 



(13) The Liassic Flora of the Mixteoa Alta of Mexico, its com- 

 position, age, and source. Ibid. vol. xxx\t:. p. 251. 



(14) A study of some American Fossil Cycads. Pt. vii. Further 



notes on disk structure. Ibid. vol. xxxvrn. p. 117. 



(16) American Fossil Cycads. Vol. n. Taxonomy. Washington. 



