To make the envelopes it is necessary to use two pieces of paper of different 

 sizes, one being narrower and shorter than the other. The size of the pieces is 

 determined by the size of the specimens to be mounted. The margin of the 

 envelope should be wide enough to hold the specimen securely and at the same 

 time leave a sufiicient amount of the specimen exposed for examination purposes. 

 The smaller piece is folded at the ends as in fig. i ,a. This piece is then placed on 

 the larger piece and the sides of the larger piece folded over as in fig, 2,b. The 

 ends (fig. 2,c) are then folded under giving the completed envelope as shown in 

 fig. 3. These envelopes can then be glued to the herbarium sheet and the speci- 

 mens inserted as with ordinary envelopes. 



The advantages claimed for this method are in the saving of time in the 

 -examination of the specimens and, also, in the saving of the specimens from 

 becoming broken. 



Departmext of Botany, DePauw University, Greencastle, Ind. 



REVIEW 



A CATALOGUE OF PORTUGUESE MOSSES^ 



The bryological flora of Portugal has for a long time been far less well known 

 than that of any other portion of Western Europe. How little the flora has 

 been studied may be seen from the fact that when Messrs. Dixon and Nicholson^ 

 in 191 1 re-traversed the ground so carefully worked by the Count de Solms- 

 Laubach in the Algarve, out of the hundred species and varieties recorded by 

 them twenty-three were believed to embody new records for Portugal. Indeed, 

 Brotherus in the Natiirlichen Pflanzenfamilien, writing in 1901, lists only three 

 papers dealing with Portuguese mosses. Since then, however, active work by 

 Messrs. Dixon, Nicholson, Kindberg, Coutinho, Machado, and Luisier, have 

 greatly extended our knowledge, until the work now before us lists 7 species of 

 Sphagna, 4 of Andreaea, and 313 species of Bryales exclusive of varieties, many 

 of which latter are considered species by other authors. 



Senhor Machado's work attempts to set forth the actual present day know- 

 ledge of Portuguese mosses. No form has been admitted to the list unless the 

 author has personally examined an authentic specimen, or in a few cases, has 

 found a printed report of the highest authenticity. Furthermore, the distri- 

 butional data given are all exact, with citation of locality and collector, practi- 

 cally no generalizations being attempted. We cannot too strongly commend 

 this attitude, which not only makes easy the study of geographic distribution, 

 but renders it possible for subsequent authors to verify Senhor Machado's work 

 at any time should differences arise in interpretation of species. 



1 Antonio Machado. Catalogo descritivo de Briologia Portuguesa. Edicao e propriedadc 

 do Gabinete de Botanica de Faculdade de Sciencias da Universidade do Porto. Lisboa. 1919. 

 pp. 1-143. 18 X 26 cm. 



^ H. N. Dixon. Results of a Bryological Visit to Portugal. Rev. Bryol. 39: 33-50. (1912). 



