No. 1, July, 1920] TAXONOMY, VASC. PLANTS '207 



a taxonomic arrangement <>f I he known genera and species of orchids from ( lentral Amei 

 i including Mexico). The 132 genera are arranged iii :«; groups, beginning with the Cypript di- 

 linae and ending with the Sarcanthinae. An extensive synonymy is given throughout. A 



list of 11 names for Mexican species all described originally by La Llave and Lexar/.a 'Nov. 

 Veg. 2. 1825 ) is appended ; 1 lie applic:il ion of I hese names to their respect [ye species ha- not 



been settled. Preceding the taxon ic arrangemenl is a detailed historical resume* of earlier 



colled ing of orchids in Central America and Mexico, from the Spanish physician l.l Eernandez 

 (Mexico, 1571-1577) down to A. Tonduz, \VerckI6, Biolley, II. Pittier, W. It. Maxon, C. A. 

 Purpus. Mrs. Rousseau, etc. of the present, century. The geographic area embraced in the 

 study extends, approximately, from 33° to 9° north latitude and from 80° to 115 west longi- 

 tude. Separate discussions are given for Mexico, British Honduras, Guatemala, etc. The 

 Mexican flora is referred to four main regions — the warm, the temperate, the arid-tem- 

 perate (die Kakteenrcichen, temperieirten Regionen) and the cold. The arid-temperate 

 region has very few orchids.. Mexico has a total of 92 genera of orchids. Tables are given 

 showing the relative degree of endemism in each genus. An astonishingly large number of the 

 species, namely 482, or almost four-fifths of the total, are endemic in Mexico. Furthermore, 

 66 of the remaining species are restricted to Central America, never having been found else- 

 where. Only 3 genera (Erycina, with 3 species, and Papperitzia and Mormolyce, each with 1 

 species) are endemic in Mexico. Mexico and South America have 41 species common to 

 both. Of the orchid flora of British Honduras, Honduras and San Salvador, very little is 

 known. In Guatemala, 84 genera are present. Of these species, 207 are endemic in Guatemala 

 and 92 others are endemic in Central America. Nicaragua's orchid flora is not well known. 

 It has, however, 32 genera; 20 species are endemic in Nicaragua, and 18 others endemic in Cen- 

 tral America. Costa Rica is rich in orchids, having 91 genera; 285 species are endemic in 

 Costa Rica and 62 others endemic in Central America. Panama has 54 genera, with 65 species 

 endemic in Panama and 34 others endemic in Central America. Only 5 Panama species are 

 identical with those from the West Indies, but there are 17 Panama species, or about one- 

 seventh of the total, that are identical with South American species. — A table is given 

 showing the species-distribution for each genus in each country studied. Of the 1325 species 

 embraced in the 132 genera, 628 are found in Mexico, 8 in British Honduras, 338 (366 ? — loc. 

 cit., p. 343) in Guatemala, 18 in Honduras, 13 in San Salvador, 57 in Nicaragua, 396 in Costa 

 Rica, 117 in Panama. Relationships of the Central American and Mexican orchids to those 

 of other lands are discussed. A new genus, Epilyna, is described. There are also detailed 

 Latin descriptions of 85 new species. These all are included in the taxonomic synopsis that 

 closes the article. — Earl E. Sherff. 



1769. Schneider, Camillo. Notes on American willows. V. The species of the Pleon- 

 andrae group. Jour. Arnold Arboretum 1: 1-32. July, 1919. — The present article deals with 

 the American species of Salix belonging to the Pleonandrae group which comprises the sections 

 Nigrae, Triandrae, Pentandrae and Bonplandianae. Twelve species and several varieties 

 are enumerated and their distribution, relationship and nomenclature discussed at length. 

 One species and one form are described as new: Salix Harbisonii (S. marginata Small, not 

 Wimmer) and S. amygdaloides f. pilosiuscula. — Alfred Rehder. 



1770. Schneider, Camillo. Notes on American willows. VI. Jour. Arnold Arboretum 

 1 : 67-97. 1919. — The present article deals with the section Phylicifoliae including 10 species, 

 the section Sitchenses with 2 and the new section Brewierianae also with 2 species. The fol- 

 lowing new species, new varieties and forms are proposed: Salix pulchra var. yukonensis, S. 

 planifolia var. monica (S. monica Bebb), S. pellita f. psila, S. Jepsonii, S. Coulteri f. par vi folia 

 and S. delnortensis. [See also Bot. Absts. 3, Entries 1838, 1839.] — Alfred Rehder. 



1771. Schonland, S. Klingia, a new genus of Amaryllidaceae. Rec. Albany Mus. 

 [Grahamstown, South Africa] 3: 178-1S1. Fig. 1-2. 1919. — This is a description of a new 

 genus from Namaqualand. It is closely allied to GethulUs. — E. P. Phillips. 



