IIO Allgemeines. — Anatomie. 



zufuhr zu, so findet eine stete Reduction der Blattgrösse statte 

 die bei directer Lichtzufuhr (Landformen) ihren Höhepunkt er- 

 reicht. 



Den Schluss der Arbeit bilden die Resultate, die sich für 

 die Systematik ergaben. 



Hinsichtlich des Alisnia Plantago ist zu betonen, dass die 

 Linne'sche Pflanze 2 Species umfasst, das A. Plantago (L.) 

 und das A. graminifolium Ehrh. Es lassen sich die europäi- 

 schen Arten wie folgt gliedern: 



Alisina Plantago I. var. latifolliini a) forma aquaticiim^ 



b) forma terrestre ; II. v^x. lanceolatiim a) forma aquaticum, b) 

 forma terrestre. Allsma graminifolium ai forma angustissi- 

 miim Ascherson et Gräbner, b) forma typiciim (Beck-Mana- 

 getta), c) forma terrestre f= A. arcuatiun Mich.), d) forma 

 pumilum Nolte. Echinodorus ranunculo ides (L.) Engel- 

 mann a) forma typiciis, b) forma zosterifolius Fries, c) forma 

 terrestris, d) forma piimiliis. E. ranunciil oides var. rep ens 

 (Lam.) a) forma natans, b) forma graminifoliiis, c) forma piuni- 

 liis. Elisma natans (L.) Buchenau a) forma typiciim 

 Ascherson et Gräbner, b) forma repens Ascherson et Gräbner, 



c) forma sparganiifolium Fries, d) forma terrestre. Caldesia 

 pa rnass ifolia (Bassi) Pari, a) forma natans, b) forma 

 terrestris Ascherson et Gräbner. Damasonium st e Hat um 

 (Rieh.) Pers. a) forma natans, b) forma graminifolium, c) forma 

 spathulatum, d) forma terrestre, e) forma pumilus. Sagit- 

 taria sagit lifo IIa L. a") forma typica Klinge, b) forma 

 natans (Klinge), c) forma terrestris (Klinge), d) forma vallis- 

 neriifolia Coss. et Germ. Diejenigen Formen , denen kein 

 Autor beigesetzt ist, sind vom Autor neu aufgestellt worden. 



H. Glück (Heidelberg). 



Tansley, A. Q. and R. B. J. Lulham, A Study oftheVas- 

 cular System of Matonia pectinata. (Annais of Botanv. 

 Vol. XIX. No. LXXVl. 1905. p. 475.) 



The great complexity of the vascular System of Matonia 

 has so often attracted attention of late that a complete and 

 exhaustive account of its structure such as is given in this 

 paper is especially welcome. The more so because a carefui 

 and detailed description of the progressive complication of the 

 vascular System in both rhizome and leaf of several young 

 plants is also provided. 



In the first place the form and branching of the leaf is 

 studied in relation to the structure of the earliest leaves of 

 the young plant which are here described. As a result it is 

 suggested that the type of structure of the leaf is due to the 

 repeated forking of the two branches of a primary dichotomy. 

 The Upper member of each fork becomes a pinna, while the 

 lower member repeats the dichotomy until at last it too be- 

 comes a pinna. The median pinna between the forks of the 

 primary dichotomy represents the upper member of the first 



