Neue Litteratur. 99 



Lillie, Ralph S. 1903. On differences in the direction of the electrical 

 convection oi certain free cells and nuclei. (Americ. Journal of 



Physiology. Vol. 8. No. 4. p. 273—284.) 

 Mereschkowsky, C. 1903. Ueber farblose Pyrenoide und gefärbte Elaio- 



plasten der Diatomeen. [Mit 4 Abb. im Text.] (Flora. 1903. p. 77 



—97.) 

 Pirotta, R. e Longo, B. 1903. Sullo sviluppo del seme del Cynomorium 



coccineum L. (Annali di Botanica del Prof. R. Pirotta. Vol. 1. 



Fase. 1. 3 pp.) 

 Potonie, H. 1903. Ein Blick in die Geschichte der botanischen Morphologie 



und die Pericaulom-Theorie. (Erw. Abdr. aus der Naturwis. Wochenschr. 



N. F. Bd. 2, der ganzen Reihe Bd. 18. Mit 9 Abb. [in 6 Figuren]. 



Jena, Fischer. 

 Pröspcr, Eduardo Reyes. 1903. Algunos curiosidades de las orquideas. 



(La Naturaleza. 1903. p. 25—29. Avec 3 figures.) [Traite de la 



feeundation des Orchidees.] 

 Stuart, Gager C. 1903. A simple device for carrying minute objeets 



through the grades oi Cedar Oil and Paraffin. (J. of Applied Micro- 



scopy and lab. methocis. Vol. 6. p. 2115.) 

 Suringar, J. Valckenier. 1903. Fortschreitende Metamorphose. [Mit Tafel 



XXVI] (Ber. d. d. Bot. Ges. Jahrg. 1902. Bd. 20. H. 10. p. 592—594. 



Ausgeg. 29. Jan. 1903.) 

 Waters, C. E. 1903. Obtusilobate forms of some ferns. (The Plant World. 



VI. p. 1 — 4. pl. 1, 2.) [Calls attention to many transition forms 



between contracted fertile pinnules and broad sterile ones of varions 



common ferns. — Moore.] 

 Worsdell, W. C. 1903. The origin of the perianth of flowers. [Plate III.] 



(The new Phytologist. 1903. p. 42—48.) 



IV. Biologie. 



B[Iackman], V. H. 1903. Some recent observations on Mycorhiza. (New 

 Phytologist. 1903. p. 23—24.) 



Crossland, C. 1903. Note on the Dispersal of Mangrove Seedlings. With 

 a figure in the text. (Annais of Botany. 1903. p. 267—270.) 



Detto, Carl. 1903. Ueber die Bedeutung der ätherischen Oele by Xero- 

 phyten. [Mit 7 Textfig.] (Flora. 1903. p. 147—199.) 



Hiltner, L. 1903. Beiträge zur Mycorhizafrage. I. Ueber die biologische 

 und physiologische Bedeutung der endotrophen Mycorhiza. [Mit Tai. I.] 

 (Naturwissensch. Ztschr. f. Land- und Forstwirtschaft. Jahrg. 1. Januar 

 H. 1. p. 9—25.) 



Schulz, A. 1903. Beiträge zur Kenntniss des Blühens der einheimischen 

 Phanerogamen. (Ber. d. d. Bot. Ges. Jahrg. 1902. Bd. 20. H. 10. 

 p. 580—592. Ausgeg. 29. Jan. 1903.) 



V. Varietäten, Descendenz, Hybriden. 



Anonymus. 1903. Cypripedium Hindeanum = Cypripedium Godefroyae 

 X C. Insigne Harefield Hall Variety. (Gardeners Chronicle. 1903. 

 p. 53. With portrait of flower.) 



Anonymus. 1903. Odontoglossum x, Bradshawiae. [111.) (Gardeners 

 Chronicle. 1903 p. 82.) 



Bailey, Charles. 1903. The Oxlip, and its relations with the Cowslip and 

 Primrose in England. (Reprinted, with additions from Vol. I, p. 26 — 35 

 of the Proceedings of the Manchester Field Club.) Illustr. Manchester, 

 Hinchcliffe <& Co. 



Borneman, G. 1903. Disa Kewensis (grandiflora X tripetaloides). [Hierzu 

 Tafel 1510.] (Gartenflora. 1903. p. 57.) 



Campbell, D. H. 1903. The origin of terrestrial plants. (Science n. s. 17. 

 Jan. 16. p. 93—104.) [The prineipal headings in this, the Vice- 

 presidential address before the Botanical Section at the Washington 

 meeting, are photosynthesis, water, marine plants, the origin of 

 terrestrial plants, and origin of the sporophyte. The most momentous 



7* 



