rootstock:

More on rootstock from Fact Monster:

• rhizome - rhizome rhizome or rootstock,fleshy, creeping underground stem by means of which certain plants ...
• trillium - trillium trillium or wake-robin, any plant of the large genus Trillium, attractive spring ...
• canna - canna canna [Lat.,=cane], any plant of the genus Canna, tropical and subtropical perennials, grown ...
• beach grass - beach grass beach grass or marram grass, any species of the genus Ammophila, perennial grasses used ...
• cattail - cattail cattail or reed mace,any plant of the genus Typha, perennial herbs found in almost all open ...

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