50 MORPHOLOGY, ETC., VASC. PLANTS [Box. Absts., Vol. IX, 



329. ScHELLBACH, H., undFr. BoDiNUS. Ubcr Vanillin-Erzeugnissc. [Vanilla products.] 

 Zeitschr. Untersuch. Nahrungs- u. Genussmittel 40: 34-37. 1920. 



330. Stern, J. Moste des Jahres 1919 aus den Weinbaugebieten der Nahe, des Glaus, 

 des Rheintales unterhalb des Rheingaues, des Rheingaues, des Rheins, Mains und der Lahn. 

 [Musts of 1919 in the Rhine valley, etc.] Zeitschr. Untersuch. Nahruugs- u. Genussmittel 

 40: 78-80. L920. 



IVIORPHOLOGY, ANATOMY AND HISTOLOGY OF VASCULAR 



PLANTS 



E. W. SiNNOTT, Editor 

 (See also in this issue Entries 62, 175, 226, 380, 405, 453) 



331. Balasubramanyam, M. Variegation in certain cultivated plants. Jour. Indian 

 Bot. 1 : 325-329. PI. 3. 1920. — From an examination of leaf structure of cultivated ornamen- 

 tal plants with variegated leaves, the author concludes that there are 3 kinds of mesophyll 

 in the leaf — palisade above, spongy below, and a distinct type between. Variegations are 

 due to varying amounts or complete absence of chlorophyll in these 3 layers. — Winfield 

 Dudgeon. 



332. BucHHOLZ, John T. Polyembryony among Abietineae. Bot. Gaz. 69: 153-167. 

 15 fig. 1920. — Not all Abietineae show a complete separation of the 4 primary embryos, 

 as is characteristic of Pinus. The cleavages separating the 8 embryos are the free nuclear 

 divisions of the proembryo. In Picea and other forms without cleavage polyembryony, 

 cell divisions homologous with those in Pinus occur in the proembryo. The Abietineae 

 embryos may be arranged in an intergrading series, with Pinus at one end and Pseudotsuga 

 at the other, on the basis of the occurrence of cleavage polyembryony, rosette embryos, and 

 the apical cell; the rosette embryos and their vestiges, the rosette cells, are gradually elimina- 

 ted from Pinus to Pseudotsuga. Cleavage polyembryony, rosette embryos, and the apical cell 

 mark a primitive type of embryo development. The embryo development of this group shows 

 how the apical cell was lost in the evolution of the Abietineae. On the basis of embryogeny 

 Pseudotsuga is unique and clearly entitled to generic rank. — H. C. Conies. 



333. BuGNON, P. Causes du parcours transversal des faisceaux libero-ligneiuc aux noeuds 

 des Graminees. [The cause of the transverse course of the fibrovascular bundles at the nodes 

 of grasses.] Compt. Rend. Acad. Sci. Paris 171 : 673-675. Fig. 1-3. 1920. — A continuation of 

 a study reported in a recent number of this journal (see Bot. Absts. 7, Entry lOGO). The 

 change in direction of the bundles at the nodes is attributed to lack of space or necessary 

 tissue, and to the readiness with which transverse bundles can be formed at this level. — C. H. 

 Farr. 



334. BuscALioNi, L. Sui tricomi delle Felci con particolare riguardo alle Parafisi. [On 

 the trichomes of ferns with particular regard to the paraphyses.] Alalpighia 28: 545-554. 

 1920. — The article completes a study of the structure and function of fern paraphyses. The 

 peculiar structure of these organs in different species of ferns suggests their use as a basis for 

 comparison in systematic study. Paraphj^ses function as a means of protection to the sporan- 

 gia, either mechanically or by reason of substances contained in them, and possibly serve also 

 in regulating the dissemination of spores. — Edith K. Cash. 



335. Church, A. H. Elementary notes on the reproduction of angiosperms. Bot. Mem. 

 [Oxford] 4. 23 p. 1919. — These are notes apparently used by the author in connection with 

 some of his courses in botany. — J. S. Cooley. 



336. Church, A. H. Elementary notes on structural botany. Bot. Mem. [Oxford] 4. 

 27 p. 1919. — These are notes used by the author in connection with some of his courses 

 in botany. — /. S. Cooley. 



