Botanical Words Alphabetical List - RI

RIB:1. A ridge (usually vertical) on a cactus stem that is formed from the skin. Stem succulents (those plants that retain large amounts of moisture in their swollen stems) are often ribbed, allowing them to expand or contract sideways as their water stocks are restored or depleted. 2. One of the main veins of a leaf or other plant organ.

RIPARIAN: Living or growing along the banks of a river or other waterway.

RIVULOSE: Marked with irregular, crooked, or wavy lines.

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