1914] SNOW— DIAPHRAGMS OF WATER PLANTS 515 



leaves of Posidonia caulini and Cymodocea antarctica to be diaphragms. He 



does not mention diaphragms in his reports on Phyllospadix (26) and 

 Riippia (27). 



In Najadaceae by Leitgeb (18). 



In Hydrocharitaceae by Meyen (20), Sauvageau (23, 24, 25), Solereder 

 (32), Montesantos (22), and Cunnington (5). Balfour (i) states that the 



canals of Halophila end at the nodes in thick tissue, and Caspary (2) makes 

 the same statement for the Hydrilleae. Sauvageau (24) does not mention 



ragms 



(11c). 



J 



J 





Meyen 



Duval- Tou 



Duval-J 



No mention of diaphragms is made by Costantin (3) in his report on Butomus. 



(20). 



Jouve (7, 8, 9, 10), and Meyen 



In Cyperaceae in Engler and Prantl (11c), by Meyen (20, 21), Leitgeb 



Bary (6). 



J 





(37). 



Duval-Jouve (9), and Weiss 



Prantl 



May 



(nc) suggests the presence of diaphragms. 



In Pontederiaceae in Engler and Prantl (iic), by Meyen (20), Duval- 



Jouve 



Juncaceae in Engler and Prantl (iic), by Duval-Jou 



SCHWENDENER (30). 



J 



J 



Meyen 



j 



Meyen 



Prantl (iic) and by Duval- Jouve 



LITERATURE CITED 



i- Balfour, Bayley, On the genus Halophila. Trans. Bot. Soc. Edinburgh 



290-343 



2. Caspary, Robert, Die Hydrilleen (Anacharideen Engl.). Jahrb. Wiss 



Bot. 1:377-513- pk.35-39> 1858. 

 3- Costantin, J., Recherches sur la structure de la tige des plan? s aqua- 



tiques. Ann. Sci. Nat. Bot. VI. 19:287-331. pis. 14-17. 1884. 



