AUgemeiue Morphologie. 429 



VI. The loss of the lamina acts as a Stimulus vvhich induces a developmeat 

 and differentiation of spongy parenchymatous and other tissues in the 

 stipule, and the formation of chlorophyl. 

 VII. The lateral buds of Acer on internodes formed during the previous 

 season were awakened by defoliation of the extending apical portion. 

 VIII. The period of activity of the vegetative point of the terminal portion of 

 a Woody branch is not lengthened as a result of defoliation. 

 IX. The total longth of the newly formed portion of the branches defoliated 

 during growth was thirty to sixty percent less than that of normal 

 branches occupying the some relative positions on the shoot. 

 X. The number of internodes developed on defoliated branches was greater 

 than in the normal. 

 XI. The defoliated internodes were of a diameter not greater, sometimes 

 less than the normal, and had accomplished less perfect differentiation. 

 XII. Branches compelled to accomplish growth in a defoliated condition 

 generally are found to be in a State of hypoplasia, the undeveloped 

 and imperfectly differantiated condition of the tissues being diie to the 

 lack of correlative stimnli. 

 Siehe auch Richards im Bot. Centralbl., XCIII (1903), p. 618. 



697. Massalongo, C. Nuove spigolature teratologiche. La nota. (BoU. 

 Soc. bot. ital., 1902, pp. 134—138.) 



698. Massart, Jean. Comment les plantes vivaces maintiennent leur 

 niveau souterrain. — Comment les plantes vivaces sortent de terre au prin- 

 temps. — Comment les jeunes feuilles se protegent contre les intemperies. 

 (Bull. Jard. bot. de lEtat ä Brnxelles, 1903, vol. I, fasc. 4, 104 pp., 36 fig.) 



Da es zu weit führen würde, alle Fälle, die der Verf. bei seiner um- 

 fangreichen und verdienstvollen Arbeit angeführt hat, aufzuführen, so sei es 

 mir gestattet, eine Übersicht über diese Fälle und die Zusammenfassung der 

 Resultate zu geben.*) 



I. Arbeit: Procedes par lesquels la souche monte et descend. 



I. Ascension. 



1. Allongement des entrenoeuds (Serratula tinctvricu Viola odorata)- 



2. Allongement des entrenoeuds et localisation des bourgeons. 



a) Les entrenoeuds qui sallongent restent minces (Tradescantia virginica, 

 Apocynum cannabinum). 



b) Les entrenoeuds des .bourgeons portes par la souche, ainsi que lea 

 entrenoeuds inferieurs de la tige qui a fleuri. deviennent epais et se 

 remplissent de substance de reserve (Inula Helenium). 



3. Localisation des bourgeons. 



a) Les bourgeons hivernants sont tous sur la tige dressee. 



b) Les bourgeons hivernants sont sur la tige et sur la souche ancienne 

 (Clematis reda, Phlox paniculata). 



c) Les bourgeons hivernants sont sur la tige, sur la souche et sur les 

 racines (Rubia imctorum, Euphwbia Esula). 



4. Courbui-e de la souche. 



a) Les entrenoeuds courbes sont courts (Asmiragoüleae). 



b) Les entrenoeuds dresses sallongent fortement [Ranunculus euer, Acorus 

 Calamus). 



*) Ref. hat es der Genauigkeit wegen vorgezogen, die folgenden Tabellen mit den 

 Worten des Verfs. in französischer Sprache zu geben, da sich bei Übersetzungen oft trotz 

 der grössten Sorgfalt Ungenau iglieiten einschleichen. 



