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Rib structures in cells of the velamen

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1  velamen
2  wall thickening

 
English name: Orchid
Scientific name: Oncidium sp.
Familia: Orchidaceae
Classis: Monocotyledonas
Phylum: Angiospermae
Regnum: Plantae
The velamen is the multilayered epidermis of the aerial root of orchids. The thickened walls restrains desiccation.

http://www.vcbio.science.ru.nl/en/image-gallery/show/labels/PL0270/print/

last modified: 5 Jun 2014