Bryophyten 55 



165—166°. Die Flechte ergab ferner noch einen neuen Stoff, die 

 Leiphämsäure, C^hksO«, welche eine echte Säure ist und stark 

 bitter schmeckt. 



In einem Nachtrage benachrichtigt uns Verf., dass es ihm gelungen 

 ist, in der Usnea hirta noch eine fünfte Flechtensäure, die neue Hirtell- 

 säure, zu finden. Zum Schlüsse werden noch die Analysenwerthe der 

 Protolichesterinsäure rectificirt. Zahlbruckner (Wien). 



Cardot, J. and THERIOT, L, The Mosses of Alaska. (The 

 Bryologist. Vol. VI. Sept. 1903. p. 86—89.) 



Conclusion of the reprint of this article from the „Papers from the 

 Harri man Expedition." William R. Maxon. 



Chamberlain, Edward, B., Buxbaumia aphylla L. (The Brvo- 

 logist. Vol. VI. Sept. 1903. p. 76.) 



B. aphylla is reported from Cabin John Bridge, Maryland. 



William R. Maxon. 



Chamberlain, Edward B., MountingMoss Specimens. (The 

 Bryologist. Vol. VI. Sept. 1903. p. 75—76.) 



Notes on a convenient way of attaching moss-packets to sheets by 

 means of pins. William R. Maxon. 



Hansen, Aug., De danske Amblystegium- Art er. (Botanisk 

 Tidsskrift. XXV. Kobenhavn 1903. p. 387— 406. With 10 fig. 

 in the text.) 



The author gives an elaborate description in danish of 14 species 

 and several varieties of Amblystegium (= Eu- Amblystegium Lindb.) 

 found mostly by himself in Denmark. Three of them viz. A. saxicola, 

 A. atrovirens and .4. paludosum are new and also described in english. 

 With few exceptions, the author gives no Synonyms, although his view 

 on several species differs somewhat from others. The limitation of the 

 species as understood by Mr. Hansen may approximately be seen from 

 the following translation of his key. 



A. Plants very small without central Strand and nerves: Serpo-Leskea 

 Hampe. 



a) Monoecious. Perichaetial leaves entire, nerved half-way 



A. subtile. 



b) Dioecious. Perichaetial leaves toothed, nerveless A. Sprucei. 

 3. With central Strand and nerves. 



a) Nerve 0,05 — 0,10 mm. broad, in section oval or roundish, excur- 

 rent or vanishing in or below acumen : 



1. Dioecious. Nerve excurrent .4. fallax. 



2. Monoecious. Nerve not exccurrent 



u) Acumen short and obtuse A. fluviatile. 



ß) Acumen long and slender, nerve vanishing a little below 



apex .4. varium. 



/) Leaves shortly and gradually acuminated, nerve vanishing 



in the apex itself A. irriguum. 



b) Nerve flat, suddenly acuminated and vanishing somewhat below 

 apex, as a rule 0,02 — 0,06 mm. broad. 



1. Small species, leaves seldom more than 1,2 mm. long, basal 

 cells 10 — 14 p broad 



«) Leaves erecto-patent, gradually acuminate, basal cells 

 numerous, quadratic 



Nerve 0,02—0,03 broad A. serpens. 



00 Nerve 0,05—0,06 broad A. saxicola. 



