242 MORPHOLOGY AND TAXONOMY* OF BRYOPHYTES [Box. Absts., Vol. IX, 



and hypocotyl, that the annular and spiral vessels of the primary wood are cut off from func- 

 tioning, and that the sieve tubes and companion cells are obliterated; but the pericycle, the 

 metaxylem, and the parenchyma cells of the primary wood, and the parenchyma cells of the 

 primary bast retain their functions. The normal circle of vascular bundles arises from a row 

 of cells in the central cylinder. The primary medullary rays are formed by cells from the per- 

 icycle. The extra-fascicular vascular bundle circle arises from a meristem originating either 

 in the pericycle or in the parenchyma of the primary bast. In the hypocotyl the fascicular 

 meristem in the pith develops from the pericycle, whereas that outside the pith develops either 

 from the pericycle or the parenchyma of the primary bast. In the root the fascicular meristem 

 usually develops from the parenchyma of the primary bast. Storage tissue develops from 

 parenchjina cells of the bast of the vascular rings and from medullary ray tissue. The outer 

 cells of the pericycle develop into a phellogen several layers thick. — Reginald H. Colley. 



1500. SouEGES, Rene. Embryogenie des Scrofulariacees. Developpement de rembryon 

 chez le Veronica arvensis. [Embryogeny of the Scrophulariaceae, The development of the 

 embryo of Veronica arvensis.] Compt. Rend. Acad. Sci. Paris 172 : 703-705. Fig. 1-17. 1921. — 

 The stages of development of the embryo of Veronica arvensis are described. They are found 

 to be quite similar to those of Oenothera and the Cruciferae. — C. H. Farr. 



1501. VuiLLEMiN, Paul. La zygomorphose endogene dans les fieurs nonnalement actino- 

 morphes. [Endogenous zygomorphosis of flowers which are normally actinomorphic] Compt. 

 Rend. Acad. Sci. Paris 172 : 428^31. 1921. — The types and examples are given of modifications 

 of normally actinomorphic flowers into zygomorphic ones. Modifications of position of 2 

 types are described, namely, radial and circular displacement. Two types of modification 

 of configuration are also defined, namely, homologous substitution and disproportion. Modi- 

 fication in number may be either discordant oscillation, abortion with addition of supplemen- 

 tary members, or the development of complementary members. — C. H. Farr. 



1502. Vuillemin, Paul. La zygomorphose exogene dans les fieurs normalement actino- 

 morphes. [Exogenous zygomorphosis of flowers which are normally actinomorphic] Compt. 

 Rend. Acad. Sci. Paris 172: 514-517. 1921. — Types and examples of exogenous zygomorphosis 

 are given. The 3 main types distinguished are synanthic and parasynanthic zygomorphosis 

 and zygomorphosis at a vegetative junction. — C. H. Farr. 



MORPHOLOGY AND TAXONOMY OF ALGAE 



E. N. Transeau, Editor 

 (See in this issue Entries 1503, 1674") 



MORPHOLOGY AND TAXONOMY OF BRYOPHYTES 



Alexander W. Evans, Editor 



1503. Boulger, G. S. The cryptogams of Andrews' Herbarium. Jour. Botany 57: 337- 

 340. 1919. — This list is supplementary to a list of phanerogams. Notes are presented on 1 

 fern, 12 mosses, 6 hepatics, 21 algae, 4 lichens, and 7 fungi. — K. M. Wiegand. 



1504. Evans, Alexander W. Taxilejeunea pterogonia and certain allied species. Bull. 

 Torrey Bot. Club 48: 107-136. PL 2, 22 fig. 1921. — The following species, which represent a 

 clearly defined grouj), are treated: Taxilejeunea pterogonia (Lehm. & Lindenb.) Schiffn., 

 widely distributed in tropical America; T. jatnaicensis sp. nov., known only from Jamaica; 

 T. densiflora sp. nov., known only from Jamaica and Colombia; and T. debilis (Lehm. & Lin- 

 denb.) Steph., widely distributed in tropical America. — P. A. Munz. 



1505. Holzinger, J. M., and T. C. Frte. Mosses of the Bureau of Soils Kelp Expedition 

 to Alaska. Publ. Puget Sound Biol. Sta. 3 : 23-C4. 32 fig. 1921. — A list is given of the mosses 



