160 MORPHOLOGY, ETC., VASC. PLANTS [Box. Absts., Vol. VII, 



1058. Brown, J. G. The cycads. [Rev. of: Chamberlain, Charles J. The living 

 cycads. Univ. of Chicago Press: Chicago, 1919.] Plant World 22: 364-365. 1919. 



1059. Browne, Isabel M. P. Phylogenetic considerations on the internodal vascular 

 strands of Equisetum. New Phytol. 19: 11-25. 7 fig. 1920.— See Bot. Absts. 7, Entry 1101. 



1060. Btjgnon, p. Dans la tige des Graminees, certains faisceaux liberoligneux longi- 

 tudinaux peuvent etre des faisceaux gemmaires. [In the stem of grasses, certain longitudinal 

 fibrovascular bundles seem to arise from the "gemmaire" bundles.] Compt. Rend. Acad. 

 Sci. Paris, 170: 1201-1203. 4 fig. 1920.— The longitudinal bundles are prolongations of leaf 

 traces, but the transverse bundles at the nodes may be variously interpreted. The "gem- 

 maire" bundles of Poa annua may take a longitudinal course like those of the leaf traces.— 

 C. H. Farr. 



1061. Drummond, Montagu. Besleria lutea Linn., a new example of water-calyx. Ann. 

 Botany 34:551-553. 1920.— A description is given of the water-calyx of Besleria lutea, a 

 Gesneraceous shrub native in the West Indies and South America. This is the first record of 

 a water-calyx in the family, most of the other examples being found in the related Bignoni- 

 aceae. The greatly inflated calyx tube is filled with a clear liquid from the early bud stage 

 until the corolla is fully open. The liquid is probably secreted by capitate glands on the 

 inner epidermis of the calyx.— IF. P. Thompson. 



1062. Griebel, C. Die mikroskopische Untersuchung der Tee-und Tabakersatzstoffe. 

 [Microscopy of tea and tobacco substitutes.] Zeitschr. Untersuch. Nahrungs-u. Genussmittel 

 39:225-299. 1920.— See Bot. Absts. 7, Entry 1283. 



1063. Grier, N. M. Notes on comparative regeneration in Elodea and Ceratophyllum. 

 Amer. Botanist 26: 80-84. 1920.— Segments of Elodea canadensis must contain a localized 

 bud- and root-forming region, which occurs about every tenth node, in order to regenerate. 

 Each segment of Ceratophylhim demersum seems capable of budding. If more than one node 

 is included in the segment, only certain favorably located buds develop.— S. P. Nichols. 



1064. Hill, A. W. Studies in seed germination. Experiments with Cyclamen. Ann. 

 Botany 34: 417-429. PI. 20, 15 fig. 1920.— The seedling of Cyclamen possesses a single coty- 

 ledon and a rudimentary curved protuberance lying opposite to it. Morphological evi- 

 dence is given to show that this rudimentary organ is really a suppressed second cotyledon. 

 This evidence is supported by the results of experiments. It may be induced to develop by 

 the removal of the first cotyledon, and then responds to the removal of its lamina by regener- 

 ating a new lamina or new laminae, just as does the first cotyledon when its lamina only is 

 removed. Plumular leaves are unable to respond in this way. The seedling of Cyclamen, 

 therefore, through aberrant in type, is truly dicotyledonous in nature.— IF. P. Thompson. 



1065. KusTER, Ernst. Botanische Betrachtungen iiber entwicklungsmechanische Be- 

 griffe. [Botanical considerations of the principles of the mechanics of development.] Natur- 

 wissenschaften 8: 453-457. 1920.— A discussion from the standpoint of the botanist of how 

 far the general principles of the mechanics of development, as formulated by Roox, apply 

 to theproblems in plant development. This issue is devoted to Roux's work and is in honor 

 of his seventieth birthday. — Orton L. Clark. 



1066. Markle, M. S. Some abnormalities in plant structure. Proc. Indiana Acad. Sci. 

 1918:117-124. 9 fig. 1920.— The author discusses briefly, and figures: some embedded 

 archegonia and antheridia of ferns; an embryo-sac of Lilium with cells all at one end; a 

 "3-story" reproductive branch of Vaucheria; and a megaspore tetrad of Selaginella with wall 

 around group instead of individual spores. — F. C. Anderson. 



1067. Mattirolo, Oreste. Commemorazione di Saverio Belli. [Memorial to Saverio 

 Belli.] Atti R. Accad. Sci. Torino 55: 8-30. 1919-1920. See Bot. Absts. 7, Entry 704. 



