Natuurtijdschriften

Oscillations in the redistribution of the growth sibstance naphthylacetic acid after phototropic induction Article

Acta botanica neerlandica, 18(1), 84-94.

I. de Haan

January 1969
Gregor Mendel and Hugo de Vries on the species concept Article

Acta botanica neerlandica, 18(1), 95-98.

J. Heimans

January 1969
An electron-microscopical study of the plasmodesmata in the roots of young barley seedlings Article

Acta botanica neerlandica, 18(1), 99-107.

R.J. Helder and J. Boerma

January 1969
A contribution to the wood anatomy of South American (chiefly Suriname) Rubiaceae. I. Article

Acta botanica neerlandica, 18(1), 108-123.

J. Koek-Noorman

January 1969
The occurrence of asperulosidic glycosides in the Rubiaceae Article

Acta botanica neerlandica, 18(1), 124-137.

P. Kooiman

January 1969
Two new species of ferns from Suriname Article

Acta botanica neerlandica, 18(1), 138-142.

K.U. Kramer

January 1969
Some observations on barium sulphate in Spirogyra Article

Acta botanica neerlandica, 18(1), 143-151.

D.R. Kreger and H. Boeré

January 1969
Notes on American Loganiaceae III. Revision of Bonyunia Rich. Schomb. Article

Acta botanica neerlandica, 18(1), 152-158.

A.J.M. Leeuwenberg

January 1969

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