Fig. 16. Neuropteris Heterophylla.
A line reproduction of a drawing by Miss Janet Robertson.
The top part of the drawing (Fig. 16), shewing the general morphology of the plant, was drawn with a brush charged with white ink upon a black ground. In the simplest possible way relief has been obtained by representing the leaflets of the nearer fronds by white spaces, whilst those further away are represented by white outlines. An enlargement of a frond is shewn on the lower part of the picture, and here the parts are represented in black on a white ground. The leaflets are in black outline and the fruits are made to stand out, as in the upper part, by the use of local colour—in this instance black—their shape being indicated by the curve of the higher lights. In brief, a very effective drawing has been made by the simplest use of the white line, the white space, the black line and the black space.
Fig. 17. Fucus volubilis, var. Flexuosus, a seaweed.
(From a drawing by Miss Baker.)