[98]

Bot. Zeitung No 24. May 15. 1868

Hildebrand on Potatoes Maize & Apples.

322. 323 I used potatoes (1) of a red sort of somewhat elongated shape with "schülferig" upper surface & (2) of a round white sort with smooth upper surface. Control experiments were made with both & both were shown to be constant I took tubers of both kinds cut all the eyes out & fastened eyes of the other sort in with little bits of wood. I obtained only two plants one white, one red— On digging up in summer I found tubers of one colour resembling the unterlager stock & I found one tuber on each plant which was intermediate. That was best developed which was produced by red eyes grafted on a white tuber. This had a elongated shape & at one end was quite like the red sort in that it had besides the red colour the peculiar surface; the red colour extended to near the middle of the now smooth tuber then came a white region with red stripes, and finally at the other end it was quite white like the unterlager stock on which the red eye had grown.

The opposite [illeg] grafted plant was not so good: but was generally speaking similar

[Variation 2d ed. 1: 420: "In the 'Botanische Zeitung' (May 16, 1868), Professor Hildebrand gives an account with a coloured figure, of his experiments on two varieties which were found during the same season to be constant in character, namely, a somewhat elongated rough-skinned red potato and a rounded smooth white one. He inserted buds reciprocally into both kinds, destroying the other buds. He thus raised two plants, and each of these produced a tuber intermediate in character between the two parent-forms. That from the red bud grafted into the white tuber, was at one end red and rough, as the whole tuber ought to have been if not affected; in the middle it was smooth with red stripes, and at the other end smooth and altogether white like that of the stock."]