502 Bacteriologie. — Pteridophyten. 



tenden Unterschiede in der Entwicklung in gleicher Weise durch 

 isotonische Lösungen von Natrium- und Kaliumnitrat erzielt werden. 

 Viele der verbreiteten gelben und roten Luftkeime wurden auf 

 kochsalzhaltigen Nährböden zu intensiverer Farbstoffbildung ange- 

 regt. Bei Sarcina rosea und Micrococcus Intens trat der rote bezw. 

 gelbe Farbstoff bei bestimmten Konzentrationen der Kulturlösung 

 in diese über. G. Bredemann. 



Matthew, C. G., Enumeration of Chinese Ferns. CJourn. 

 Linn. Soc. Bot. XXXIX. p. 339-393. London, July 1911.) 



An alphabetical enumeration of Chinese Ferns, containing nearly 

 1100 entries with citations, distribution, and where necessary, some 

 Synonyms. The System of nomenclature is that of Diels and of 

 Chris tensen. A. Gepp. 



Maxon, W. R., A new fern from Panama. (Amer. Fern Journ. 

 II. p. 21—22. February 29, 1912.) 



Dicranopteris Williamsii Maxon, sp. nov., of the family Gleiche- 

 niaceae, is described from Cana, Panama, the type being Williams 

 917. It is related, though not closely, to D. orthoclada a Costa Rican 

 species. Maxon. 



Maxon, W. R„ A remarkable new fern from Panama. 

 (Smiths. Mise. Coli. LVI. 24. p. 1—5. pl. 1—3. November 22, 1911.) 



Describes Polypodium podocarpum Maxon, sp. nov., from the 

 high rain-forest region of Chiriqui, western Panama, the type 

 being Maxon 5640. This species is remarkable in several respects, 

 but especially in the position of its sori; these are borne singly at 

 the ends of the elongate teeth or lobes of the linear primary pinnae. 

 Both the pinnae and the fronds are of indeterminate growth, a 

 feature which is not common in Polypodium but of which several 

 examples are cited. Many of the fronds also have the pinnae greatly 

 elongate and repeatedly dichotomous. Maxon. 



Maxon, W. R., The relationship of Asplenium Andrewsii. 

 (Contrib. U. S. Nat. Herb. XVI. p. 1—3. pl. 1—2. February 13, 1912.) 



The relationship of Asplenium Andrewsii A. Nelson, described 

 from Colorado in 1904, is discussed and the type speeimens are 

 figured. It appears to be merely an American form of the ex- 

 ceedingly variable and widely distributed A. Adiantum-nigrum L. T 

 being in rather close agreement with certain speeimens from France 

 and England. Maxon. 



'& 



Safford, W. E., Notes of a Naturalist afloat. I. (Amer. Fern 

 Journ. I. p. 121 — 129. pl. 5. October, 1911.) 



This paper is the hrst of a proprosed continued series of arti- 

 cles summarizing the more interesting of the writer's botanical 

 observations and collecting experiences, mainly in the tropics, while 

 in the U. S. Navy. This first instalment deals with the Vegetation 

 of the Isthmus of Panama. Especial mention is made of the palms 

 and ferns, and one species of the latter (Lygodittm radiatnm), known 

 only from Panama, is here figured for the first time. Maxon. 



