202 THE PLANT WORLD 



The calluses on the large piuk ones increased in size and became 

 bulb-like (Fig. 1, a), while the yellow and white ones formed thickened 

 tuber-like processes (Fig. 2, b) on their roots. The leaves remained 

 green for a long time (however, no new leaves were produced), and 

 finally changed color gradually and appeared to be ripening naturally. 



The experiment had to be discontinued during the summer. 

 Wliether true bulbs and tubers would have been formed finally, or 

 whether what was formed would have died soon after the leaves had 

 ceased to function, will require further experimentation. Some plants, 

 such as Bryophylhmi and Begonia, are readily propagated from the 

 leaves, though in a somewhat different manner than that employed for 

 oxalis. 



Wliile the propagation of oxalis from the leaves has no commer- 

 cial value at the present prices charged for bulbs, even if it can actually 

 be accomplished, perhaps the mere rooting of the leaves may be new 

 and of some interest to a few beside mvself. 



Lincoln, Nebraska. 



THE BLOOMING OF TWINING HONEYSUCKLES. 



By Byron D. Halsted. 



AHEDGrE of honeysuckle {Lonicera Japonica var.) near my house 

 offers opportunity for a daily watching of the anthesis of these 

 plants. Passing over all preliminaries of early and late blooming 

 of this species, it may be said that the observations of a systematic sort 

 began when marks were placed upon the nodes bearing long white 

 flower buds, invariably four at each joint. The coarse strings were 

 tied on at five P. M., and at six o'clock four of the twentj^ buds were 

 opened; an hour later nearly all the marked buds were expanded. All 

 except one set of buds were open the next morning, and this bloomed 

 the following evening. 



The blossom opens by one of the five lobes of the corolla, the lower 

 one, separating from the other four which always remain as one piece 

 with the pentamerous tj^pe plainly demonstrated in the four prominent 

 teeth of the upper lip of the long showy corolla. As the independent 

 lobe splits off from the other, the five long stamens and the equally 

 long styles are exposed to view in the space between the two parts of 

 the very irregular two-lipped corolla. The anthers at once show large 

 quantities of pollen, and while the upper and much larger lip of the 

 corolla is being reflexed upward, insects arrive. It is at this time that 

 the delicate, far-reaching fragrance of the many opening flowers is 

 borne upon the ;iir of the approacliing evening. 



