Trees : a handbook of forest-botany for the woodlands and the laboratory.

  • Harry Marshall Ward
Date:
1904-09
Catalogue details

Licence: Public Domain Mark

Credit: Trees : a handbook of forest-botany for the woodlands and the laboratory. Source: Wellcome Collection.

Provider: This material has been provided by the Gerstein Science Information Centre at the University of Toronto, through the Medical Heritage Library. The original may be consulted at the Gerstein Science Information Centre, University of Toronto.

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    ■I] Iii some genera (e.g. Cremolobus, Fig. 60) the two lalves of the silicule come away from the axis enclosing ach its single seed, like mericarps from the carpophore o a Cremocarp, only in comparing with the fruit of imbellifers we must remember it is here superior. Some crucifers bear two kinds of fruit on the same ilant—e.g. achene and silicule in Aethionema, lomentum md silique in Chorispora, and even siliques aDd silicules n Cardamine, the latter ripening underground. Subter- anean silicules also occur in Geococcus and Morisia. A Fig. 59 A. Fig. 59 B. Fig. 60. Fig. 59. Aethionema coridifolium. A, winged fruit. B, longitudinal ection of winged fruit (Bai). Fig. 60. Cremolobus suffruticosus, DC, schizocarp with winged meri- arps (E and P). In the Capparidacese the simplest typical fruit is like i silique, but without the longitudinal partition, so that vhen the valves of the capsule separate they leave the ieeds on the margins of the replum, but the latter has no nembrane across—e.g. Gleome (Fig. 61)—but here again >ach valve may come away like a mericarp, bringing the ingle seed (the rest being aborted) with it—e.g. Wisli- -,enia. In Dipterygium (Fig. 62) the fruit is indehiscent, las only one seed, and is winged, like a samaroid achene. Next we get a series where the pericarp becomes leshy and the fruit is therefore Baccate. In Capparis
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