Band 128. Nr. 21. XXXVI. Jahrgang. I. Bd. Nr. 21 



Botanisches Gentralblatt 



Referirendes Organ 



der 



Association Internationale des Botanistes 

 für das Gesamtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten: des Vice- Prä sidenten : des Secretärs: 



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



und der Redactions-Commissions- Mitglieder: 



Prof. Dr. Wm. Treleasa, Dr. G. Bonaventura, A. D. Cotton, 



Prof. Dr. C. Wehmer und Dr. C. H. Ostenfeld. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern, 



Dr. J. P. Lotsy, Chefredacteur. 



No. 21. 



Abonnement für das halbe Jahr 15 Mark 

 durch alle Buchhandlungen und Postanstalten. 



1915. 



Alle für die Redaction bestimmten Sendungen sind zu richten an: 

 Icedaction des Botanischen Centralblattes, Haarlem (HoUand), Spaarnei?. 



Arber, A., The Anatomy of the Stamens in certain In- 

 dian Species of Parnassia. (Ann. Bot. XXIX. p, 159 — 160. 1 texfig. 

 Jan. 1915.) 



This Note forms a Supplement to a previous paper by the same 

 author, "On the structure of the Androecium in Parnassia and its 

 Bearing on the Affinities of the Genus." Ann. Bot. XXVII, p. 491, 

 1913. In that paper the stamen-anatomy of certain species of Par- 

 nassia froin Europe and America belonging to the Section 

 Nectarodroson was considered; in the present Note the conclusions 

 then put forward are confirmed by evidence derived from Indian 

 species belonging to the Section Nectarotrilohos. 



Agnes Arber (Cambridge). 



Boodle, L. A., Concrescent and Solitary Foliage-Leaves 



in Pimis. (New Phyt. XIV. p. 19—22. 4 textfig. Jan. 1915.) 



A tree of the Austrian Pine {Piniis Laricio Porr. var. nigricans 

 Pari. (=: P. Laricio var. Austriaca Endt) growing in the Royal Bo- 

 tanic Gardens, Kew, has been found to bear a number of pairs of 

 concrescent leaves every year, and also a number of leaves borne 

 Single on spur shoots, instead of in pairs. These solitary needles 

 arise by the arrest of one leaf, and are strictly comparable in origin 

 to those of Pinus nionophylla. The concrescent leaves appear to be 

 produced by partial fusion of two normal leaves, and there seems 

 to be no reason to assume that any of the tissue in the region of 

 concrescence is other than leaf tissue. The author regards it as quite 

 probable that the double needles of Sciadopitys verticillata may be 



Botan. Centralblatt. Band 128. 1915. 37 



