

1920] CURRENT LITERATURE 



407 



Dixon 1 * has published a report on the mosses of the Diimmer-Maclennan 

 Expedition to Mount Elgon in 1918, and also on a small collection from 

 the Aberdale Mountains. In the larger collection 46 species are reported, 

 representing 32 genera. Ten new species, in as many genera, are reported 

 for the smaller collection, and a new genus is established (Kleioweisiopsis) in 

 Pottiaceae. 



Lange, 20 in his third part of the Agarics of Denmark, presents Pluteus 

 (15 spp.), Collybia (28 spp.), and Inocybe. (47 spp.). Only 4 new species are 

 described (in Inocybe), but there are many transfers, based upon new con- 

 ceptions of species and genera. 



Setchell and Gardner 21 have described 16 new species of marine algae, 

 distributed among 9 genera, one of which {Inter nor did) is new. It is an 

 endophyte, "growing within the membranes of Porphyra Naiadum." The 

 same authors, 22 in the second part of their monograph of the marine algae of 

 the Pacific Coast, have published the Chlorophyceae. The analytical keys, 

 full descriptions, excellent illustrations, and complete bibliography, present 

 the group in a most satisfactory way. The group is represented by 6 orders, 

 13 families, 34 genera, and 136 species. The largest genera are Cladophora 

 (17 spp.), Enter omorpha (16 spp.), and Viva (13 spp.). 



B^rgesen 23 has issued the third and fourth parts of his "Marine algae 

 of the Danish West Indies/' which continue the presentation of the Rho- 

 dophyceae. The two parts include 75 species, two of which are new, dis- 

 tributed among 29 genera. Mesothamnion is established as a new genus of 

 the Ceramiaceae. — J.M.C. 



Ovules and seeds of Thymeleaceae. — Guerin 24 has investigated the 

 anatomical structure of the ovule and seed of 27 genera of the Thymeleaceae. 

 In the ovule the entrance to the micropyle is obstructed more or less by 

 elongated cells which arise from the base of the stylar canal and become many- 

 celled hairs. In some genera these cells are massed together and constitute a 

 kind of obturator, which does not seem to hinder the penetration of the pollen 



19 Dixon, H. N., Reports upon two collections of mosses from British East 

 Africa. Smithson. Miscell. Coll. 72: no. 3. pp. 20. ph. 2. 1920. 



Lange, Jakob E., Studies in the Agarics of Denmark. III. Dansk Botanisk 



20 



Arkiv 2:1-47. pis. 1-3. 1917. 



21 



\RDNER 



Univ. 



Calif. Publ. Bot. 7:279-324. pis. 21-31. 1920. 



22 



America. Part II. 



9-33 



Chlorophyceae. Univ. Calif. Publ. Bot. 8:139-374- pk 



2 * B0rgesen, F., The marine algae of the Danish West Indies. Ill and IV. 

 Rhodophyceae (3 and 4). Dansk Botanisk Arkiv 3:145-240, 241-304. Jigs. 82 

 and 77. 191 7 and 1918. 



,natomique 



Thymeleacees. Ann. Jard. Bot. Buitenzorg II. 14:1-35. 1915. 



