Biologie. — Morphologie. 361 



Frucht enthält nur wenige Samen und wandert als dreiflügelige 

 Schliessfrucht. Bei Heclysanim multijiigiim ist an Stelle der 

 anderen Hedysarnm-Arien eigenen Verbreitung durch Pelzthiere 

 Windverbreitung getreten. Die Früchte haben die Widerhaken 

 verloren, sind eingliederig geworden und die stehen bleibende 

 Blumenkrone dient als Flugorgan, Die Blüten von Apios tiiberosa 

 entwickeln nur wenige Pollenkörner und sind so gebaut, dass 

 weder Selbst- noch Fremdbestäubung stattfindet. Im Zusammen- 

 hang damit steht es, dass Blüthen bei der genannten Papilio- 

 nacee nur selten auftreten und Fortpflanzung durch Wurzel- 

 knollen die Regel geworden ist. Büsgen (Hann. Münden). 



Thisleton-Dyer, Sir W. T., Morphological Notes. IV. The 

 Haustorium of Loranthus aphylliis. (Annais of Botany. 

 XV. Dec. 1901. p. 749—757. With Plate XL.) 



The haustoria of this holoparasitic plant penetrate the 

 cortical tissue of Cereiis Qiiisco. \i is seen to consist of a 

 very irregulär mass freely ramifying and sometimes anastomo- 

 sing in the cortex of the Cereus. The structure of the 

 haustorium could not be made out but it was shown to be 

 encased by a periderm derived from the adjoining cortical 

 tissues of the host. W. H. Lang. 



Rennert, R. J, Seeds and seedlings of Arisaema tri- 

 phyllum and A. Dracontlum. (Bull. Torrey Botanical Club. 

 XXIX. Jan. 1902.) 



A comparative study of the structure of the seed, and the 

 germination in Arisaema trlphyllum and A. Dracontiiim, with 

 some observations on a hybrid between these species, as well 

 as upon the Himalayan species A. flaviim. 



The seeds of the two species principally studied, are much 

 alike, and the embryos in the ripe seed, are very similar. On 

 germination it is found that the hypocotyl, and the corm formed 

 from it, are much better developed in A. Dracontiiim, while 

 the roots and plumula are better developed in A. triphylliim. 

 In both species the cotyledon remains within the seed. A 

 well-developed foliage-leaf is regularly, formed in A. trlphyllum 

 soon after germination. Only about 10 procent of the seed- 

 lings of A. Draconilum develop a foliage leaf the first season. 

 A. flaviim, behaves like A. trlphyllum, while the hybrid form 

 is intermedial in character between the parents. The type of 

 .4. trlphyllum is considered more primitive than that of A. Dra- 

 contlum. The paper is illustrated by one plate. 



D. H. Campbell. 



Bakoni, E., Notizie sopra un caso di fasciazione nel 

 Poterlum Sangulsorba. (Processi verbali, in Bolletino della 

 Societä botanica italiana, ottobre 1901. n. 7. p. 287.) 

 C'est la premiere fois qu'on vient de decrire un pareil cas 



de fasciation dans cette espfece. Le rameau a 42 cmt. de long, de 



