Band 134. Nr. 8. XXXVIII. Jahrgang. L Bd. Nr. 8. 



Botanisches Centralblatt. 



Referierendes Organ 



der 



Association Internationale des Botanistes 

 für das Gesamtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten: des Vice- Präsidenten: des Secretärs: 



Dr. D. H. Scott. Prof, Dr. Wm. Trelease. Dr. J. P. Lotsy. 



und der Redactions-Commissions- Mitglieder : 



Prof. Dr. Wm. Trelease, Dr. C. Bonaventura, A. D. Cotton, 



Prof. Dr. C. Wehmer und Dr. C. H. Ostenfeid. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 



Dr. J. P. Lotsy, Chefredacteur. 



No. 8. 



Abonnement für das halbe Jahr 15 Mark 

 durch alle Buchhandlungen und Postanstalten. 



*» 



1917. 



Alle für die Redaction bestimmten Sendungen sind zu richten an: 

 R ädaction des Botanischen Centralblattes, Haarlem (Holland), Spaarne 17. 



Wernham, H. P. , The systematic anatomy of the 

 gen US Canephora. (Beih. bot. Cbl. 1. XXVIII. p. 453-472. 7 figs. 

 1912.) 



The anatomical characters of the genus Canephora are asso- 

 ciated with xerophily. The parenchyma is for the most part of 

 thick-walled Clements. The intercellular space-system is inconspi- 

 cuous, even in the ieaves where the lacunae are but feebly deve- 

 loped; the epidermis in all parts is provided with a remarkably thick 

 cuticle. The fibres have exceptionally ihick walls, with lumina al- 

 most or quite obliterated. The xylem vessels, too, are small as 

 Seen in section, and have small lumina. The petiole is traversed by 

 three vascular bundles — one large median Strand and two quite 

 small lateral ones. The leaf-blade is comparatively thick in all the 

 species examined although C. Gondotii shows some leaning to a 

 thinner type. The guard-cells of the stomata are always associated 

 each with a subsidiary cell placed parallel to the pore and so the 

 stomata conform to the so called „Rubiaceous" type. The peduncle 

 of the inflorescence is invariably borne in the axil of a leaf, and 

 so must be regarded morphologically as a stem structure. Tannin 

 is plentiful in the cells, especially abundant in the palisade tissue. 

 Calcium Oxalate occurs in diverse forms; raphides non observed. 

 Crystal-sand is abundant in the phloem. — The characters of the 

 Singular species (C. fnadagascariensis Gm., C. angustifolia Wernh., 

 C. GGudotii Wernh.) are explained. Matouschek (Wien). 



Häuser, R., Untersuchungen an Makrogametophyten 



Botan. Centralblatt. Band 134. 1917. 8 



