266 NEW JERSEY AGRICULTURAL COLLEGE. 



and is abundantly supplied with food substances directly from 

 the young leaves that are more or less closely associated with it. 



Many plants at this date (September loth) show leafy 

 branches with two sets of leaves more or less evident. For ex- 

 ample, the California privet {Lignnstrum Japonicum Thunb.) 

 twigs show all their leaves (evergreen) intact, the basal ones 

 little more than kidney-shaped bodies sitting upon the stem, 

 while the next pair is an inch or so broad, deeply notched at the 

 tip and strikingly different from the ovate-lanceolate leaves 

 which characterize the upper portion of the stem. These same 

 twigs show a foot or two above the insertion with an older 

 branch a repetition more or less complete of the small reniform 

 or obcordate leaves that gradually measure much longer and be- 

 come taper-pointed as the tip of the stem is approached. 



As these observations were not begun until some weeks after 

 the refreshing rains came, one can only infer that which actual 

 sight at an earlier date might better have supplied. It would seem 

 that during the prolonged drought the privet twigs ceased to pro- 

 duce new pairs of leaves and the terminal buds assumed somewhat 

 the condition of those that are in late autumn going into winter 

 quarters. How much there was of reserve material being cen- 

 tered at the base of the bud, it is not possible to determine; but 

 with the return of water supply to the roots, the buds resumed 

 growth with the formation of abbreviated internodes and broad 

 notched pairs of leaves that seem to be incident to the initial 

 growth of stems from winter-buds in this hedge plant. 



A forest nursery illustrates the point in hand and, to be 

 particular, a single stem of white oak is here described somewhat 

 in detail. The stem is divided into the old and the new growth 

 of the season, the former being quickly distinguished from the 

 latter by the number and size of the leaves. The new growth 

 (19 centimeters) has eight leaves, the fourth, fifth and sixth 

 from the base being the largest, the first and the eighth being the 

 smallest. At the base of the new growth there are scale scars 

 below which are eight small leaves in a distance of 6 cm. The 

 leaves vary somewhat in size but average 7 cm. long and 3.4 

 cm. broad and have seven lobes upon each side extending half- 

 way to the mid-rib. The third leaf upon the new growth is 15 

 cm. long, 7 cm. broad, with only three lobes upon either side 

 and extending halfway to the mid-rib. The contrast is still 

 stronger between the last leaf of the old growth and the first 

 upon the new, the latter with two side lobes being nearly as 

 broad as long, while the former is a long narrow leaf with a 

 deeply many-notched margin. 



