264 TAXONOMY, VASC. PLANTS [Bot. Absts. 



1819. Hay ata, Btjnz6. Protomarattia, a new genus of Marattiaceae, and Archangiopteris. 

 Bot. Gaz. 67: 84-92. 1 pi., 3 text fig. 1919. — Protomarattia tonkinensis is described and illus- 

 trated as a new genus and species of the Marattiaceae, from Monte Tamdao (Tonkin), China. 

 Four species of Archangiopteris are recognized namely, A. subintegra, A. tamdaoensis Hayata, 

 spp. nov. and A. Henryi Christ from China, also A. Somai Hayata from Formosa. [See Bot. 

 Absts. 3, Entry 1283.] — J. M. Greenman. 



1820. Maxon, W. R. A new Cheilanthes from Mexico. Proc. Biol. Soc. Washington 32: 

 111-112. 1919. — Cheilanthes castanea Maxon is described as a new species. — J. C. Gilman. 



1821. Maxon, W. R. A new Alsophila from Guatemala and Vera Cruz. Proc. Biol. Soc. 

 Washington 32: 125-126. 1919. — Alsophila scabriuscula Maxon is described as a new species 

 from Alta Verapaz, Guatemala, and Vera Cruz. — J. C. Gilman. 



SPERMATOPHYTES 



1822. Abrams, L. R. A new California cypress. Torreya 19:92. 1919. — The note 

 describes Cupressus nevadensis sp. nov. This was first discovered by Mrs. Polkinghorn on 

 Red Hill, Piute Mts., near Bodfish, Kern Co., Cal., in 1907, and was again collected by the 

 author in 1915. Its closest relationship is to C. Sargentii Jepson.— J. C. Nelson. 



1823. Blake, S. F. Revision of Ichthyomethia, a genus of plants used for poisoning fish. 

 Jour. Washington [D. C] Acad. Sci. 9: 241-252. 1919. — The trees of this genus are of economic 

 importance among the natives of tropical America who use the bark of the root to pois n 

 fish. The timber is also valuable. This paper describes the eight known species of the 

 genus, substituting, in harmony with the American Code of Botanical Nomenclature, the 

 name Ichthyomethia for Piscidia. Three of the described species are new, and several new 

 combinations have fteen made. — Helen M. Gilkey. 



1824. Britton, N. L., and J. N. Rose. The Cactaceae, descriptions and illustrations of 

 plants of the cactus family. Vol. 1. Carnegie Inst. Washington [D. C] Publ. 248. 24 X 30 

 cm., vii + 286 p., 36 plates (mostly colored), 301 fig. August, 1919. — This is the first volume 

 of a monograph of the Cactaceae which is being prepared through a cooperation of the Car- 

 negie Institution of Washington, the New York Botanical Garden, the U. S. National Museum 

 and the U. S. Department of Agriculture. The monograph is to include the results of special 

 exploration and is to give special attention to habitat and relations to other species. The 

 present volume deals with the Pereskieae and Opuntieae. Illustrations are very numerous, 

 both photographs and drawings. — B. E. Livingston. 



1825. Detmers, Freda. Two new varieties of Acer rubrum L. Ohio Jour. Sci. 19: 235- 

 239. PI. 12-13. 1919. — Two trees found on Cranberry Island, Buckeye Lake, Ohio, are 

 designated as Acer rubrum L. var. viride and Acer rubrum L. var. rubrocarpum. Detailed 

 descriptions of each variety are given and a key to the section Rubra of the genus Acer in the 

 United States is appended. — H. D. Hooker, Jr. 



1826. Griffiths, David. New and old species of Opuntia. Bull. Torrey Bot. Club 46: 

 195-206. PL 9-10. 1919. — The following new species of Opuntia are described: 0. ejfulgia, 

 0. cyanea, 0. diversispina, 0. hispanica, 0. chala, 0. Maideni, 0. obovata, 0. amarilla. Two 

 species of the same genus, 0. Bartrami Raf. and 0. maritima Raf. are "recognized for the 

 first time since originally described." — P. A. Mum. 



1827. Hedlund, T. Upprop. [A request]. Bot. Notiser 1919: 103-104. 1919.— Mr. Hed- 

 lung requests Swedish botanists to corroborate by field study his contention that the culti- 

 vated Ribes rubrum L. is really a native of Sweden, and as common in the wild state as any 

 other of the Swedish species of red currants, and should retain its usual name R. rubrum. 

 Janczewski has claimed that it is not a native of Sweden and that t ho name R. rubrum, under 

 which Linnaeus included several species, should be applied to a native species. He, there- 

 fore, applied it to R. Schlechtendalii, a treatment to which Mr. Hedlund objects. — P. A . 

 Rydberg. 



