Lyon: OBSERVATIONS ON EMBRYOGENY OF XELUMBO. 651 



number of Nymphaeacece will be studied during the coming 

 summer. The Nymphceaceae should be classified, in the natural 

 system, in a subseries Nymphaeineas coordinate with the 

 Potamogetonineae, Alismineae and Butomineas in the series 

 Helobise. 



RECAPITULATION AND SUMMARY. 



1. Jfclumbo both in its anatomy and embryogeny conforms 

 to the type of the Monocotyledons. 



2. The two fleshy bodies of the embryo arise through the bi- 

 furcation of the originally single cotyledon. 



3. The membrane surrounding the plumule is, as conjectured 

 by Wigand, a true endosperm arising within the embryo-sac. 



4. The family of the Nymphasaceae should be classified 

 among Monocotyledons in the series Helobiae. 



The writer wishes to express his obligations to Professor 

 Conway MacMillan who has carefully followed the present in- 

 vestigation, offering many suggestions which have been incor- 

 porated in the general discussion. 



LITERATURE. 



The following bibliography includes the more important works 

 dealing with the anatomy, morphology or affinities of Nelumbo, which 

 have been found of value in the present research. 



1. Baillon, H. (V 1 )- Monographic des Nymphaeace'es. Histoire des 

 Plantes, 3: 77-104. 1871. 



2. Barthelemy, A. ('74). De la respiration et de la circulation des 

 gaz dans les vegetaux. Ann. Sci. Nat. Bot. V. 19 : 131-175. 1874. 



3. Barthelemy, A. ('76). Du developpement de 1'embryon dans le 

 Nelumbium speciosum et de sa germination. Rev. Sci. Nat. 5 : 

 40-44. 1876. 



4. Brongniart, A. ('27) . Memoire stir la Gne>ation et le Developpe- 

 ment de 1'Embryon dans les v^ge'taux phan^rogames. Chap. iv. 

 Ann. Sci. Nat. 12: 225-296. 1827. 



5. Caspary, R. ('78). Nymphaeaceae in v. Martius. Fl. brasiliensis. 

 Fasc. 77. 130. 1878. 



6. Caspary, R. ('91). Nymphaeaceas in Die Natiirl. Pflanzenfam . 

 III. Teil. 2 Abt. i-io. 1891. 



7. Caspary, R. ('57). Flora 717-718, also Bot. Zeit. 791. 1857. 



8. Clos, M. D. ('91). Interpretation des Parties Germinatives du 

 Trapa natans, de quelques Guttiferes et des Nelumbium. B. S. B. 

 de France, 38: 271-276. 1891. 



