MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. l8l 



repeated in the winter of 1902. Similar shoots 60 cm. long were 

 formed with but few branches. The epidermis formed a few func- 

 tional stomata, and the epidermal cells contained highly granular 

 lining layers of protoplasm. The thickened foreshoots described 

 above grew and remained alive about six months. '^^ 



Taraxacum sp. 

 Rootstocks of dandelion placed in dark chamber showed some 

 attenuation and a full blanching of the leaves. Excessive elongation 

 ensued in the basal portion. 



Tipularia unifolia (Muhl.) 

 B.S.P. 



Specimens received from 

 South Carolina and placed in 

 the dark room developed new 

 corms of two internodes each 

 3.5 cm. long from the apical 

 portion of which leaves 20 cm, 

 in length were sent up. The 

 laminae were rolled in a cylin- 

 drical form, and were wholly 

 free from chlorophyl. The 

 width of the leaves was about 

 that of normal organs. 



Trillium erythrocarpum Mx. 



Corms placed in a small 

 dark chamber in 1896 devel- 

 oped stems slightly longer than 

 the normal with the leaves 

 epinastic in such manner as to 



sheathe the flower bud. It is I'^i^- H^- Normal and etiolated cultures of 



to be noted that these tests were ^'''^^'■'"« erythrocarpum. 



imperfect etiolations. The flowers opened slightly, but did not form 



fruits (Fig. 141). 



i35Batalin, A. Ueber die Wirkung des Lichtes auf das Gewebe einiger mono- und 

 dicotyledonen Pflanzen. Bull. d. 1. Acad. Imp. d. St. Petersbourg, 7 : 69. 1869. 



In addition to other papers bj Knight (see p. ^) and Vdchting (see p. 21), see 

 Vdchting, H., Ueber die Keimung der KartoffelknoUen. Bot. Zeitung, 60:87-114. 

 1902. 



