Cycad collicles (鈥渓eaflet nodules鈥?

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• 作者：N. Grobbelaar^a ; P.J. Robbertse^b ; ^{hannes.robbertse@up.ac.za}
• 关键词：Colliculate ; Leaflet anatomy ; Leaflets ; Mucilage canals
• 刊名：South African Journal of Botany
• 出版年：2012
• 期刊代码：19_02546299
• 类别：abs
• 出版时间：May, 2012
• 卷：80
• 期：Complete
• 页码：77-80
• 文件大小：447 K

摘要

The presence of small knobs/nodules found on the adaxial leaflet surface of some Encephalartos species was investigated in 134 cycad species of nine genera. The knobs, referred to as collicles, were found to be the result of connecting mucilage canal 鈥榖ridges鈥?over vascular bundles, connecting mucilage canals situated between adjacent parallel vascular bundles. Collicles were found on some Encephalartos species only and not always on all individuals of the same species. The possible taxonomic value of these collicles is discussed.