48 MORPHOLOGY, ETC., VASC. PLANTS [BoT. Absts., Vol. VII, 



322. GoEBEL, K. Die entfaltungsbewegungen der Pflanzen und deren teleologische 

 Deutung. [The growth movements of plants and their teleological meaning.] 17 X 26 cm., 

 vii + 4S3 p., 239 fig. Gustav Fischer: Jena, 1920. — This volume is in the nature of a supple- 

 ment to the author's "Organographie" and is concerned -with plant movements in general,, 

 both those which are strictly movements of growth and development and those which are 

 part of the functional activity of organs. Among the subjects discussed are: the movements 

 of jointed organs; the nutation of shoots; the unfolding of leaves and their orientation; 

 developmental torsions and asymmetry; resupination in flowers; successional development; 

 irritability in floral organs; the behaviour of sensitive plants and the "sleep" movements of 

 plants. The author seeks an interpretation of all these movements from the point of view 

 of their usefullness to the plant, and concludes that the common conception of these phe- 

 nomena as adaptations is erroneous. He denies that teleology in any sense, either that of 

 purposeful acquirement or that of Darwinian adaptation through natural selection, has been 

 concerned with their origin, but believes that they have arisen fortuitously and when useful 

 have been seized and preserved by the organisms. — E .W. Sinnott. 



323. Hamilton, A. A. Abnormal branching in a palm. Australian Nat. 4: 156-157. 

 1920. 



324. HoLDEN, H. S. Observations on the anatomy of teratological seedlings. III. On 

 the anatomy of some atypical seedlings of Impatiens Roylei, Walp. Ann. Botany 34: 321-344. 

 106 fig. 1920. — The anatomy of the normal seedlings of Impatiens Roylei and the modifica- 

 tions which it has undergone in a number of abnormal seedlings are fully described. The 

 atypical seedlings are of two main kinds, the first being undoubtedly syncotylous, and the 

 second showing no macroscopic evidence of syncotyly. The members of the first group 

 can be arranged in a graded series in which the syncotyly becomes more and more intimate. 

 Its effects are (1) the suppression of the two lateral bundles of the normal cotyledon and 

 of the root pole on the symphysis side, (2) the reduction and ultimate disappearance of the 

 first epicotyledonary leaf, and (3) in extreme cases the modification of the leaves at the third 

 node. The seedlings of the second group which show no macroscopic evidence of syncotyly 

 may be either truly syncotylous or heterocotylous, and the evidence in favor of both interpre- 

 tations is mentioned. — W. P. Thompson. 



325. Jaccard, p. Inversion de I'excentricite des branches produite experimentalement. 

 [The experimental inversion of the eccentricity of branches.] Rev. Gen. Bot. 32: 273-281. 

 $ pi, 1 fig. 1920.— See Bot. Absts. 7, Entry 431. 



326. Lecomte, Henri. Sur les principaux caracteres de structure des Bois. [The prin- 

 cipal characters in wood structure.] Bull. Mus. Hist. Nat. Paris 26: 166-171. 1920. — A study 

 of the dicotyledonous woods of Indo-China has been made in order to assist in the identifica- 

 tion of specimens from that region. The structures of secretory tissues, vessels, woody paren- 

 chyma and medullary rays are reviewed, and their peculiarities in various genera indicated. 

 — E. B. Payson. 



327. Lenoir, M. Evolution du tissu vasculaire chez quelques plantules de dicotyledones. 

 {Development of vascular tissue in certain dicotyledonous seedlings.] Ann. Sci. Nat. Bot. 

 X. 2: 1-123. 91 fig. 1920. — Author deals with very young fibro-vascular bundles at their 

 passage from root, where arrangement of xylem and phloem is alternate, to stem and coty- 

 ledon, where collateral disposition is found. He presents and criticises two theories on 

 subject: (1) that which claims the splitting radially into two of the primary xylem masses 

 of root ("redoublement"), and the turning through 180° ("torsion") of each half in passing 

 up to become inner part of collateral bundle of stem or cotyledon; and (2) the theory of 

 successive stages, which states that conducting apparatus of plant shows an ontogenetic 

 series of stages — centric, excentric, alternate, intermediate, and collateral — and that there 

 is not a real identity of root bundle and cotyledonary bundle. Author sets forth obser- 

 vations on species of Veronica, Lamium, and other genera, and concludes that no true radial 



