Rib (cactus)
Ribs of Echinocactus grusonii
In the cactus family, the rib is the fused podaria of a row of leaves .
The fusion of the podaria and the development of ribs in the youth stage of Echinocactus grusonii can be observed particularly well, the seedlings of which still have distinct warts . With increasing age there is an increase in the divergence number , i. H. the number of leaf rows and thus an increase in the number of ribs.
proof
- Walther Haage : cacti from A to Z . 3rd edition, Quelle & Meyer Verlag: Heidelberg, 1986, ISBN 3-494-01142-7 , p. 655
Web links
- Entry in the dictionary of www.cactus-art.biz