66 Anatomie. 



Mellor, A.. E., The Seedling Structure of Drvas octopetala. 

 (Naturalist, n n . 656. p. 310-312. 6 figs. 1911.) 



The seedling has been examined mainly Avith reference to the 

 formation of the root stele by the vascular bundles from the leaf- 

 traces. The tetrarch type is generally regarded as typical for the 

 Rosaceae. The author's figures show that for Dryas the vascular 

 cylinder of the hypocotyl consists of two crescent-shaped plumular 

 traces with two double bundles from the cotyledons. From this point 

 downwards, the plumular traces are reduced , while the cotyledonary 

 traces unite to form a diarch stele in the root. Dryas therefore 

 shows the reduction found in many Ranales. W. G. Smith. 



Netolitzky, F., Verkieselungen bei den Rubiaceae — Galieae. 

 (Oesterr. bot. Zeitschr. LXI. 11. p. 409—412. 1911.) 



Bei den Blättern der einheimischen Galieae sind Verkieselungen 

 des Hautgewebes weit verbreitet: einzellige Haare, Epidermis der 

 Oberseite, besonders am Blattrande und an der Blattspitze, selten 

 ganze Epidermis beider Blattflächen mit den Schliesszellen in lücken- 

 losen Verbänden (Rnbia peregrina). Verkieselungen des Mesophylls 

 und Nerventeile scheinen atypische (pathologische?) Bildungen zu 

 sein. Die Stärke der Verkieselungen wechselt nicht nur innerhalb 

 der Art je nach dem Standorte, sondern auch bei demselben Indi- 

 viduum je nach dem Alter des Blattes. Zur Färbung der Kiesel- 

 skelette (besonders der Papillen) können sehr gut Teerfarbstoffe 

 (z. B. Methylenblau) verwendet werden. Dies wurde bei Rnbia aus- 

 probiert Matouschek (Wien). 



Crawford, F. C, Anatomy of the Britsh Catices. (124 pp. 

 20 pl. with biogr. sketch and portrait. Edinburgh (Oliver and Boyd). 

 1910.) 



The original intention was an investigation on the anatomy of 

 Carices from the ecological Standpoint; after 7 years work the ma- 

 terial was put together for publication, but the author did not live 

 to complete his work. This book contains his observations so far as 

 made and as originally written out, with only necessary corrections 

 which are added by Prof. Bayley Balfour. Almost all the Bri- 

 tish species (about 70) and some varieties were collected, and after 

 examination in the fresh condition were preserved, the material 

 being now at the Botanic Garden, Edinburgh. The book however 

 contains no references to floral structures because as the author 

 says "examination" of the flowers provided me with few facts to 

 record not already noted in the various floras". Nor is there any 

 reference to ecology. The first part "General anatomy (p. 1 — 12) is 

 a comparative account of the chief features presented by the vege- 

 tative organs. The remainder of the book gives the special anatomy 

 of about 70 species, each being described according to the plan: 

 stem-shape, epidermis, vascular bundles; leaf-transverse section , 

 Upper and lower epidermis, midrib, hinge cells, vascular bundles, 

 mesophyll, stomata; rhizome and root. The plates include over 100 

 separate figures, most of which are reproductions of excellent micro- 

 photographs the majority magnified 40 diameters. Several plates are 

 intended to serve as keys to a grouping of the species: thus by 

 means of the transverse section of the stomata the species are 

 grouped into six divisions, according to the presence or absence 



