No. 1, November, 1921] MORPHOLOGY AND TAXONOMY OF FUNGI, ETC. 33 



the corresponding foliar bundles are connected by the so-called "leaf traces." The author 

 presents evidence that in the Ophioglossales and Marattiales, at any rate, the stelar system 

 begins as a single strand common to the first leaf and root. The stem is absent or insignificant 

 at first and no procambium is developed within it. In the Ophioglossales and the earlier stages 

 of the Marattiales the stelar structures of the stem are built up entirely of leaf traces, though 

 in older plants of the latter order a few true cauline strands are formed. The "foliar gaps" 

 are not breaks in a single tubular stele but are merely spaces between coalescent leaf-traces. 

 The cortex is largelj^ of foliar origin, also, and the pith is not stelar in nature but is a portion 

 of the ground tissue which has been surrounded by coalescent foliar steles. The condition 

 found in the axis of the eusporangiate ferns is more in accord with the older theory of "com- 

 mon" bundles traversing a ground tissue and united to form the woody cylinder of the axis, 

 than with the assumption of a true cauline stele. This condition is probably also character- 

 istic of the Eusporangiatae. In the lycopods, conifers, and many angiosperms, however, — 

 groups in which the leaf is not the dominant portion of the shoot, — a cauline stele is undoubt- 

 edly present. — E. W. Sinnott. 



181. Denham, H, J. Method of cutting cotton hairs. Nature 107: 299. 1921.— The 

 method is a modification of that of Breckner (Zeitschr. Wiss. Mikrosk. 25: 29. 1909). 

 The author uses a coating of celloidin followed by paraffin-wax, and imbeds in paraffin. — 

 0. A. Stevens. 



182. Harris, J. Arthur, and Edmund W. Sinnott. The vascular anatomy of normal 

 and variant seedlings of Phaseolus vulgaris. Proc. Nation. Acad. Sci. [U. S.] 7: 35-41. 4 dia- 

 grams. 1921. — The authors report on a statistical study, employing pure lines. Trimeroua 

 seedlings, with 3 cotyledons and 3 primordial leaves, typically have one-half more root pro- 

 toxylem poles, hypocotyledonary bundles, and primary epicotyledonary bundles, than nor- 

 mal (dimerous) seedlings. Intercalary bundles often occur in the hypocotyl, more frequently 

 in dimerous than in trimerous seedlings. The number of primary bundles, intercalary bun- 

 dles, and double bundles which divide is notably variable; this variability differs with the 

 type of seedling and the region considered. Both in dimerous and in trimerous seedlings, 

 the total number of bundles at the base of the hypocotyl shows considerable positive correla- 

 tion with the total number in the mid-region of the hypocotyl, but little or none with the total 

 number in the mid -region of the epicotyl. — Howard B. Frost. 



183. Sou^ges, Ren^. Embryogenie des Labiees. Developement de I'embryon chez le 

 Mentha viridis L. [Embryogeny of the Labiatae. Development of the embryo of Mentha 

 viridis.] Compt. Rend. Acad. Sci. Paris 172: 1057-1058. 1921.— The development of the em- 

 bryo of this plant resembles very much that of Veronica arvensis, the same difference occurring 

 between Mentha viridis and Veronica arvensis as between Capsella bursa pastoris and Oeno- 

 thera biennis. — C. H. Farr. 



MORPHOLOGY AND TAXONOMY OF ALGAE 



E. N. Transeau, Editor 

 (See in this issue Entries 325, 332) 



MORPHOLOGY AND TAXONOMY OF BRYOPHYTES 



Alexander W. Evans, Editor 

 (See in this issue Entries 325, 328) 



MORPHOLOGY AND TAXONOMY OF FUNGI, LICHENS, BACTERIA, 



AND MYXOMYCETES 



H. M. FiTZPATRiCK, Editor 

 (See in this issue Entries 268, 292, 325 and those in the Section Pathology) 



BOTANKAL AB3THACTS, VOL. X, NO. 1 



