666 MOSSES AND FERNS 



Lang, W. H. — i. Alternation of Generations in the Archegoniates. 

 Ann. of Bot., xii : 583-592, 1898. 



2. On Apogamy and the Development of Sporangia upon Fern-pro- 



thaUi. Phil. Trans. Roy. Soc, ser. B, vol. 190, 1898. ' 



3. On Apospory in Anthoceroslosvis. Ann. of Bot., xv: 503-510, 1901. 



4. On the ProthaUi of Ophioglossum pendulum and Helminthostachys 



zeylanica. Aim. of Bot., xvi : 23-56, 1902. 



5. On a Prothallus provisionally referred to Psilotimi. Ann. of Bot., 



xviii: 571-577, i904- 



6. On the Morphology of Cyathodimn. Ann. Bot., xix: 411-426, 



1905. 



7. On the Sporogonium of Notothylas. Ann. Bot., xxi : 201-211, 



1907. 



8. A theory of Alternation of Generations, based on Ontogeny. 



New Phytologist, viii : 1-2, 1909. 



9. On a Suspensor in Helminthostachys. Ann. Bot., xxiv: 611, 



1910. 



10. On the Interpretation of the Vascular Anatomy of the Ophio- 



glossaceae. Mem. Proc. Manchester Liter, and Phil. Soc, 

 Ivi : Part II. No. 12, 1912. 



11. Studies in the Anatomy of the Ophioglossaceae. I. On the 



Branching of Bolrychium Lunaria. Ann. Bot., xxvii : 203- 

 242, 1913. 



12. The Embryo of Helminthostachys. Ann. Bot., xxviii: 19-37, 



1914. 



13. The Anatomy and Branching of the Rhizome of Helminthostachys. 



Ann. Bot., xxix: 1-54, 1915. 



14. Studies in the Morphology of Isoetes, I. The Stock of Isoeles 



lacustris. Mem. and Proc. Manchester Lit. and Phil. Soc, 

 lix: 28 pp., 1915. 

 Lawson, a. a. — I. The Prothallus of Tmesipteris Tannensis. Trans. 

 Royal Soc. Edinb., U, Part III : 785-794, 1917. 

 2. The Gametophyte Generation of the Psilotaceae. Ibid., Ui, Part 



I: 93-ii3> 1917- 

 Leavitt, R. G. — I. The Root-hairs, Cap and Sheath of AzoUa. Bot. 

 Gaz., xxxiv: 414-418, 1902. 

 2. Trichomes of the Roots in Vascular Cryptogams and Angiosperms. 

 Proc. Boston Soc. Nat. Hist., xxxi: 273-313, 1904. 

 Leclerc du Sablon. — I. Sur le sporogone des Hepatiques et le r61e 

 des elateres. Bulletin de la Soc. bot. de France, t. xxxii, pt. i : 30, 

 1885. 



2. Sur la developpement du sporogone de FruUania dilatata. Bui. de 



la Soc. bot. de France, t. xxxii, pt. 4 : p. 187, 1885. 



3. Recherches sur la developpement du sporogone des H6patiques. 



Ann. des Sci. naturelles, ser. vii, t. ii: 126-180, 1885. 



