Natuurtijdschriften

The lignin of Populus nigra L. cv. ‘Italica’. A comparative study of the lignified structures in tissue cultures and the tissues of the tree Article

Acta botanica neerlandica, 18(2), 241-314.

Catharina J. Venverloo

January 1969
On the contribution of air-borne salt to the gradient character of the Voorne Dune area Article

Acta botanica neerlandica, 18(2), 315-324.

Clara J.M. Sloet van Oldruitenborgh and Els Heeres

January 1969
Biosystematic studies of Spergularia media and S. marina in the Netherlands I. The morphological variability of S. media Article

Acta botanica neerlandica, 18(2), 325-338.

A.A. Sterk

January 1969
Action of hydrolytic enzymes on spinach chloroplast fragments Article

Acta botanica neerlandica, 18(2), 339-342.

C. Bril, J.F. Hobbelen, J.C. van Miltenburg, Y. Schouwstra and J.B. Thomas

January 1969
A new species of Urtica from the Papuan highlands and an emended distinction of Urtica urens and dioica Article

Acta botanica neerlandica, 18(3), 442-446.

M. Zandee

January 1969
An explanation of the different pH optima for indoleacetic acid oxidase activity of extracts from roots of pea and cucumber Article

Acta botanica neerlandica, 18(4), 538-543.

M.G.H. Janssen

January 1969
Cytotaxonomic studies in the genus Symphytum.II. Crossing experiments between Symphytum officinale L. and Symphytum asperum Lepech. Article

Acta botanica neerlandica, 18(4), 544-549.

Th.W.J. Gadella and E. Kliphuis

January 1969
On the influence of gibberellic acid and kinetin on the germination of turions of Spirodela polyrhiza (L.) Schleiden Article

Acta botanica neerlandica, 18(4), 550-557.

M.A.M. Lacor

January 1969

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