March, 1905.] Ohio Plants uith Tendrils. 3°5 



daughter nuclei had travelled to the antipodal region just as 

 Schaffner finds to be the case in Sagittaria, Bot. Gaz. 23: 252- 

 272, and Miss Burr in Vallisneria. In the case of Philotria how- 

 ever, no definite wall was found cutting this nucleus off from the 

 rest of the embryo sac. While Wylie seems to indicate in PI. 11. 

 figs. 35-36 that there is fusion of the second sperm nucleus with 

 the definitive nucleus it seems difficult to account for the extra 

 nucleus in the antipodal region unless there had already been a 

 division of the defiinitve nucleus or the polar nuclei had failed to 

 conjugate, for in the slides which the writer examined the polar 

 nuclei were in close contact long before fertilization and the 

 antipodals were too vescicular to indicate the possibility of any 

 further activity. 



The synergidcc stained quite characteristically so that they 

 were easily distinguished from the other nuclei in the embryo sac. 



The pollen grains showed distinctly the tube nucleus and the 

 crescentic sperm nuclei connected bv a slender filament of cyto- 

 plasm while the four members of the tetrad still remained in close 

 contact. 



OHIO PLANTS WITH TENDRILS. 



Opal I. Tillmax. 



Tendril plants are for the greater part, plants of the tropics, 

 where the vegetation is so dense that the plants have developed 

 such organs bv means of which thev are brought to a more favor- 

 able position with respect to light. The tendrils attach them- 

 selves to supports and thus bring the plant to an upright position 

 or aid it in climbing over various objects. In the different species 

 the tendrils morphologically represent different parts of the plant 

 and this furnishes a basis of classification. Some tendrils attach 

 themselves by twining entirely around the support, others as the 

 Virginia Creeper, attach themselves by means of little discs with 

 adhesive surfaces developed at the tips of the tendril. The 

 tendril usually grows straight until the tip touches some object 

 of support around which it hooks to sectire a firm hold, then it 

 shortens usually by coiling in a double spiral. 



All tendril plants may be divided into two main divisions: 

 first the leaf climbers, and second the shoot or branch climbers. 

 Each of these main divisions may be subdivided depending upon 

 the degree of development. 



In the leaf tendrils the entire leaf, terminal leaflet, petiole, or 

 petiolule or other parts may be modified into the tendril. There 

 are five families in Ohio which have plants belonging to this 

 group with twenty-three species. 



In the Smilace.-e the two tendrils are located on either side 

 of the base of the petiole, which presists, the blade being cast oft' 



