456 BOTANICAL GAZETTE [November 



trees, all of them being silicified. The species described is called Callixylon 

 Owenii, a genus recently established by Zalessky. Formerly it would have 

 been called Cordaites, the new species being closely related to Cordaites New- 

 berryi. The details of structure are very complete, and are perhaps more 

 numerous and definite than have been obtained from any Devonian wood 

 heretofore. What Wieland calls its " advanced structural type" indicates 

 great antiquity for the coniferophyte phylum. — J. M. C. 



Some new Chlorophyceae. — Transeau 14 has published some new species 

 of green algae discovered in connection with his study of the periodicity of 

 occurrence and reproduction of the algae of eastern Illinois. Thirteen new 

 species are described in the following genera: Zygnema (i), Spirogyra (7), 



Mougeot 



In Spirogyra, 5 new varieties are also 



described. This is probably an illustration of the additional species of algae 

 that will be discovered in connection with any intensive study of a region 

 J. M. C. 



Plants of Ohio. — Schaffner 1 * has published a catalogue of the vascular 

 plants of Ohio, based on specimens in the state herbarium of the Ohio State 

 University. The catalogue enumerates 2065 species, not including varieties, 

 about one-fourth of which are introduced. The last preceding catalogue of 

 Ohio plants was published by Kellerman in 1899. The present catalogue 

 is really a check list of the collection of Ohio plants at the State University, 

 and the serial numbers are the record numbers of the material. — J, M. C. 



New plants from Mexico. — Brandegee 16 has published a sixth fascicle 

 of new Mexican plants collected by Purpus, included in collections made 

 chiefly in Chiapas in 1913. The following new genera are described: Alio- 

 phyton and Amalophyllon (Scrophulariaceae), Otocalyx, Plocaniophyllon, Stylo- 

 siphonia, and Pinarophyllon (Rubiaceae), Pterosicyos (Cucurbitaceae), and 

 Tonalanthus (Heliantheae) . In addition to these new genera, 66 new species 

 are described, distributed among 51 genera. — J, M. C. 



The orchids of Java. — In presenting the fourth instalment of his studies of 

 orchids of Java, Smith 1 ? describes 48 species, included in 25 genera, 13 species 

 being new. A new genus (Abdominea) is described, the excuse for the name 

 being that the rostellum resembles the abdomen of an insect. The study of 

 tropical vegetation is making large additions to our taxonomic lists. — J. M. C. 



^Transeau, E. N., New species of green algae. Amer. Jour. Bot. nzSgS 01 ' 

 pis. 25-2Q. 1914. 



x * Schaffner, J. H., Catalog of Ohio vascular plants. Ohio State Univ. Bull. 

 18:131-247. 1914. 



16 Brandegee, T. S., Plantae Mexicanae Purpusianae, VI. Univ. Calif. Publ. 

 Bot. 6:51-77. 1914. 



■» Smith, J. J., Die Orchideen von Java. Bull. Jard. Bot. Buitenzorg II. no. 14. 

 pp. 56. 1914. 



