84 MORPHOLOGY AND TAXONOMY, BRYOPHYTES [Bot. Absts., Vol. V, 



the temperate zone. The best specific characters for this polymorphic species are derived 

 from the perichaetial leaves and capsules, and it seems to be impossible to divide it into definite 

 groups, since the variations run in different directions and are little correlated. Some of the 

 species referred in this paper to R. caespitosum, as synonyms, are the following: Hypnum 

 lithophilum Hornsch., Hypnum loxense Hook., Leucomium Robillardii (Duby) Jaeg., Pterogoni- 

 ella Stuhlmanni Broth., R. agnatum (Hampe) Jaeg., R. caespitans Schimp., R. Catillum (C. 

 M.) Jaeg., R. cucullatifolium (Hampe) Jaeg., R. Dicnemonclla (C. M.) Broth., R. Duisaboanum 

 (Mont.) Jaeg., R. fluminale (C. M.) Broth., R. inconspicuum (Hornsch.) Jaeg., R. Kcgelianum 

 (C. M.) Jaeg., R. perlaxum (C. M.) Par., R. Sauloma (C. M.) Broth., R. sphaerotheca (C. M.) 

 Jaeg., R. subsphaericarpum (Hampe & C. M.) Jaeg., Sematophyllum subnervatum Mitt., and 

 Stereodon tristiculus Mitt. In all 58 synonyms are given. — K. M. Wiegand. 



621. Dotjin, Ch., and L. Trabtjt. Deux hepatiques peu connues. [Two little known 

 hepatics.] Rev. Gen. Bot. 31: 321-328. PI. 9, 1 fig. 1919.— Two liverworts from Algeria, 

 Corbierella algeriensis Douin & Trabut and Riccinia perennis (Steph.) Trabut, are described. 

 The first is probably the same as Exormotheca Holstii Steph. but, on account of certain pecu- 

 liar characters, is made the type of the new genus Corbierella Douin & Trabut. The second 

 species, which was originally described by Stephani under the name Riccia (Ricciella) perennis, 

 is the only member of the genus Riccinia Trabut, proposed in 1916. The writers regard it 

 as intermediate between the Ricciaceae, with which it is classed, and the Marchantiaceae. — 

 L. W. Sharp. 



622. Evans, Alexander W. Notes on New England Hepaticae. — XV. Rhodora 21: 

 149-169. PL 126, 14 fig. 1919. — Under the name Nardia obscura the writer describes and 

 discusses a new species, closely related to N. hyalina (Lyell) Carringt. and N. obovata (Nees) 

 Lindb. It has been observed in several mountainous localities, especially in the White Moun- 

 tains, and seems to retain its distinctive features even while exhibiting a considerable range 

 of variability. For the sake of comparison the features of N. hyalina and N. obovata are like- 

 wise discussed. Another species, Cephalozia Loitlesbergeri Schiffn., is reported for the first 

 time from New England, the first American record having been based on material from Nova 

 Scotia. Additions to local state floras include the following: Jungermannia sphaerocarpa, 

 Calypogeia sphagnicola and Notothylas orbicularis from Maine; Riccardia pinguis, Pellia 

 Neesiana, and Lophocolea alata from Massachusetts. According to the census given at the 

 close of the paper 191 Hepaticae are now known from New England, including 142 from Maine, 

 151 from New Hampshire, 129 from Vermont, 79 from Rhode Island, 145 from Connecticut, 

 and 62 from all six states. — James P. Poole. 



623. Harris, G. T. On Schistostega osmundacea Mohr. Jour. Quekett Microsc. Club 

 II, 13: 361-374. 2 pi., 2 fig. 1917. — This moss thrives in crevices, caves, burrows, etc., facing 

 north to northeast, where it is moist but not wet. The capsules are deciduous. Gemmae 

 are formed on the protonema and are disseminated by animals. The flask-shaped cells found 

 on protonema are separation-cells, remaining after the liberation of gemmae. The protonema 

 is made up largely of obconic light-cells, whose structure is discussed, and is almost com- 

 pletely used up in mature plants. — L. B. Walker. 



624. Kashyap, S. R. The androecium in Plagiochasma appendiculatum L. et L. and P. 

 articulatum Kashyap. New Phytol. 18: 235-238. 2 fig. 1919.— At the end of the paper the 

 author summarizes his conclusions as follows: "Three different considerations, therefore, 

 show that the androecium of P. appendiculatum and P. articulatum is really homologous with 

 that of the higher Marchantiales in being a branch-system (1). The arrange- 

 ment of the scales at the tip of the lobes which is very similar to that at the tip of the vege- 

 tative lobe. (2). The repeated branching of the receptacle, two or three times in some speci- 

 mens. (3). The invariably acropetal succession of the antheridia in all lobes exactly as in 

 Marchantia, the highest genus of the Marchantiales." — I. F. Lervis. 



