450 BOTANICAL GAZETTE [November 



MINOR NOTICES 



North American Flora. 2 — The first part of volume 10 presents 10 genera 

 of the white-spored series of the tribe Agariceae. The species number 281, 

 of which 39 are new. The largest genus is Melanoleuca, with 119 species, 24 

 of which are new, and 65 transferred from other genera, chiefly Agaricus and 

 Tricholoma. The other large genera are Lepiota, with 88 species, 10 of which 

 are new, and Venenarius, with 26 species, 2 of which are new. There are also 

 3 new species in Cortinellus. 



The first part of volume 29 presents five of the eight families of Ericales, 

 281 species being recognized, 50 of which are new. New genera are described 

 in Monotropaceae (Pityopus) and Ericaceae (Therorhodion, Oreocallis, and 

 Omithostaphylos). New species are also described in Clethra (7), Hypopitys 

 (1), Pleuricospora (1), Newberry a (1), Pyrola (2), Ramischia (1), Chimaphila 

 (6), Ledum (1), Azalea (1), Kalmia (1), Kalmiella (1), Cassiope (1), Andromeda 

 (1), Xolisma (5), Gaultheria (10), Arbutus (1), Comarostaphylis (6), and Arc- 

 tous (1). The large genera of Ericaceae, as now organized, are Xolisma (24 

 spp., mostly from Lyonia), Gaultheria (24 spp.), Uva-ursi (24 spp., mostly 

 transfers), and Comarostaphylis (22 spp., mostly from Arctostaphylos). 

 J. M. C. 



Icones Bogorienses. — The fourth volume of this work, dealing chiefly with 

 plants of Java and Borneo, is completed by the fourth fascicle, 3 which pre- 

 sents 3 species of Zingiberaceae, one each of Burmanniaceae, Euphorbiaceae, 

 and Ericaceae, and 19 species of Rubiaceae, each species illustrated by a plate. 

 New species are described in Burmannia (1), Antidesma (1), Rhododendron 

 # (1), Lerchea (1), Argostema (3), Andina (1), and Acranthera (8). — J. M. C. 



NOTES FOR STUDENTS 



The xeromorphy of marsh plants. — A study of great interest and thorough- 

 ness is reported by Yapp ,4 who has for some years been investigating the 

 ecology of marsh plants. He has made an intensive study of the species 

 ecology of Spiraea Ulmaria, carrying on many experiments, as well as making 

 many field observations. The fundamental importance of carrying on many 

 such studies cannot be emphasized too strongly. In this species all leaves 

 formed during the first year are glabrous; on older plants the leaves become 



2 North American Flora 10: part 1. pp. 76, Agaricaceae (pars), by W. A. Merrill; 

 and 29: part 1. pp. 102, Ericales, by J. K. Small; Clethraceae, by N. L. Brixton; 

 Lennoaceae and Pyrolaceae, by P. A. Rydberg; Monotropaceae and Ericaceae, by 

 J. K. Small (Uva-ursi by LeRoy Abrams). New York Botanical Garden, 1914- 



3 Icones Bogorienses 4:239-294. ph. 376-400. Leide: Jardin Botanique de 

 rfitat. 1914. 



4 Yapp, R. H., Spiraea Ulmaria L., and its bearing on the problem of xeromorphy 

 in marsh plants. Ann. Botany 26:81 s-870. pis. ?. Iizs.11. iqi2. 



