520 Morphologie. Befruchtung, Teratologie, Cytologie. 



Arten aus dem Münchener Herbarium, bei welchen er die Wachs- 

 drüsen nachweisen konnte. Jongmans. 



Ridley, H. N., Branching in Palms. (Annais of Botany. Vol. 

 XXI. p. 415—422. With 6 plates. 1907. 



The greater number of palms are probably branched at least at 

 the base. In many genera palms which only produce one stem 

 are found side by side with others which habitually produce 

 lateral buds. The commonest form of growth is found in sabaliferous 

 species which sent out lateral buds from the base, the whole plant 

 forming a bush; in some the lateral shoots continue Underground 

 for some distance before forming a leafy shoot. In Nipa and Metro- 

 xylon a large branched rhizome is formed which produces lateral 

 buds some of which ascend and form the tall erect stems while 

 others produce the rhizome branches. Branching may be due to the 

 destruction of the terminal bud as described by Morris, but in all 

 cases of bifurcation examined one of the branches was a lateral bud 

 often produced low down on an alread}^ tall stem; the axillary bud 

 had grown rapidly and equalled the original stem in height. 



Sabaliferous palms have a distinct tendency to emit axillary 

 buds well above the base of the main stems as in Oncosperma fila- 

 mentosa and others. Monocarpic palms have never been seen to 

 produce axillary buds except at the extreme base. 



A list of branching palms is given; of these the greater num- 

 ber were cultivated or planted away from their original habitat. 



The branching of Areca Catechu is very rare; a specimen with 

 five almost parallel erect branches is described and in this case the 

 branching appears to be due to fasciation. In Chrysalidocarpus hites- 

 cens axillary buds had produced a large number of branches at 

 various heights from the ground. The terminal bud was uninjured. 



In all cases of simple forking in Cocos nucifera the branching 

 was due to the development of an axillary bud. A case of formation 

 of bulbils is described. 



Shoots may be formed at the nodes in Plectocomia and Cala- 

 mus leptospodix; these shoots do not develope in the former but in 

 the latter may produce a new bush. 



The inflorescence of Calamtts sp. from iVIalang mountain in Sara- 

 wak rest on or close to the ground and bulbils are produced from 

 the axils of the sheating bracts in place of a brauch of the inflo- 

 rescence. M. Wilson. 



Voss, W., Ueber Merkmale normaler Organe in monströ- 

 sen Blüten. (Ber. deutsch, bot. Ges. XXV. p. 219-224, 276—286, 

 425—433. 1907.) 



In der Hoffnung durch genaue morphologische Untersuchung 

 einen Hinweis auf irgend welche Faktoren zu erhalten, die ausser 

 der Lebenslage eine verschiedenartige Aktivierung gleichwertiger 

 Anlagen bedingen, untersuchte Verf. eine Reihe von Organen rei- 

 ner Arten, in welchen eine grosse Anzahl von Merkmalen ein Ver- 

 halten zeigte, wie es für die Mosaikbildung charakteristisch ist. Die 

 Untersuchungen zeigten nun, dass das Ziel auf dem eingeschlagenen 

 Wege nicht zu erreichen war, und zwar einmal weil sie den Beweis 

 zu liefern scheinen, dass die Aktivierung einer Merkmalsanlage in 

 vielen Fällen eine Funktion der äusseren und inneren Bedingungen 

 und der spezifischen Eigenschaften im Sinne Klebs' sein kann, 



