| Rib structures in cells of the velamen |
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1 velamen
2 wall thickening
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English name: Orchid
Scientific name: Oncidium sp.
Familia: Orchidaceae
Classis: Monocotyledonas
Phylum: Angiospermae
Regnum: Plantae
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| The velamen is the multilayered epidermis of the aerial root of orchids. The thickened walls restrains desiccation. |