
1) Oca 2) Rhizome 3) Rootstalk 4) Taro
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https://www.crosswordclues.com/clue/rootstock

1) Plant grafting component 2) Rhizome 3) Rootstalk 4) Stalk 5) Stem
Found on
https://www.crosswordclues.com/clue/rootstock

short, erect, swollen structure at junction of a plant's root and shoot systems, for example a corm. Also used to describe (1) a part of a budded or grafted plant which supplies the roots, also called a rootstock, or plants grown specifically to produce these; (2) plants or seeds with some specific attribute, for instance virus-free plants.
Found on
http://en.wikipedia.org/wiki/Glossary_of_botanical_terms

• (n.) A perennial underground stem, producing leafly s/ems or flower stems from year to year; a rhizome.
Found on
http://thinkexist.com/dictionary/meaning/rootstock/

The root upon which the scion is grafted.
Found on
http://www.arborday.org/trees/treeguide/glossary.cfm

(from the article `horticulture`) Grafting involves the joining together of plant parts by means of tissue regeneration. The part of the combination that provides the root is called ... In grafting and budding, the rootstock can be grown from seed or propagated asexually. Within a year a small amount of scion material from one plant ......
Found on
http://www.britannica.com/eb/a-z/r/66

the root onto which a scion or bud is grafted or budded.
Found on
http://www.encyclo.co.uk/local/20003

Because of the consequences of the deadly root disease phylloxera, most vines in commercial vineyards are now grafted onto a suitable American variety (these are resistant to phylloxera). The precise choice of rootstock is a critical viticultural decision, as they all have different properties.
Found on
http://www.encyclo.co.uk/local/20433

Rhizome.
Found on
http://www.encyclo.co.uk/local/20901

<botany> A short, erect, swollen structure at the junction of the root and shoot systems of a plant. ... (09 Oct 1997) ...
Found on
http://www.encyclo.co.uk/local/20973

A propagation term for a vigorous rooting plant upon which another (known as a scion) is grafted
Found on
http://www.encyclo.co.uk/visitor-contributions.php

Same as rhizome.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Root'stock` noun (Botany) A perennial underground stem, producing leafly s...ems or flower stems from year to year; a rhizome.
Found on
http://www.encyclo.co.uk/webster/R/93

Subterranean stem; rhizome.
Found on
http://www.gardenology.org/wiki/Glossary_of_Gardening_Terms

The lower part of a grafted vine which roots in the earth. Different rootstocks are chosen based on various soil, climate and pest tolerances and resistances.
Found on
http://www.supplewine.com/wine101/glossary/

The underground part of a plant containing the roots. In grafting, a plant (scion) is joined to a desirable rootstock
Found on
http://www.thompson-morgan.com/glossary-of-gardening-terms

English term for document; see there. Rootstock & rootstock vine Designation for the lower part or rootstock of a grafted vine that comes from a phylloxera-resistant American vine. During grafting, the upper part (grafting rice) of European grape varieties of the species Vitis vinifera is grafted onto this. The main reason for such grafting is...
Found on
https://glossary.wein.plus/rootstock

Root system of a more common or hardy variety that is used to graft a more desirable variety onto, usually roses and/or standard forms.
Found on
https://parkseed.com/park-glossary-garden-terms-/a/Park-Glossary-Garden-Ter

The root upon which the scion is grafted.
Found on
https://www.arborday.org/trees/treeguide/glossary.cfm
noun root or part of a root used for plant propagation; especially that part of a grafted plant that supplies the roots
Found on
https://www.encyclo.co.uk/local/20974

Another name for rhizome, an underground plant organ
Found on
https://www.encyclo.co.uk/local/21221

The part of a plant (usually a tree) which has the roots and which will influence certain growing characteristics of the plant such as height
Found on
https://www.encyclo.co.uk/local/21504

Refers to the portion on grafted plants that's chosen for the qualities of its root system.
Found on
https://www.encyclo.co.uk/local/22486

Refers to the portion on grafted plants that's chosen for the qualities of its root system.
Found on
https://www.lowes.com/projects/lawn-and-garden/garden-glossary/project

A root system and stem onto which another plant is grafted.
Found on
https://www.seasonalgardening.co.uk/garden_glossary.html
No exact match found.