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rachilla 1 var. rhachilla |
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STRUCTURE |
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A second- or higher-order axis of a compound leaf blade, bearing higher-order rachillae, leaflets, pinnules and/or tendrils. |
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rachilla 2 var. rhachilla |
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STRUCTURE |
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A second-order axis in an inflorescence, especially the axis bearing the florets in a spikelet; esp. in Cyperaceae, Poaceae (Gramineae). |
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rachis 1 var. rhachis |
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STRUCTURE |
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A main or first-order axis of a compound leaf blade. |
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rachis 2 var. rhachis |
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STRUCTURE |
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A main or first-order axis of an inflorescence. |
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radial |
= radiant, radiate, stellate |
arrangement |
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Disposed about and mutually divergent from a common geometric center in two or three dimensions, thus collectively actinomorphic. |
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radiant 1 |
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architecture |
capitulum (head) |
Bearing one or more peripheral series of florets that are bisexual, pistillate, or neuter and that have relatively large actinomorphic corollas, and one or more central series of usually bisexual florets that have relatively small actinomorphic corollas; in Asteraceae (Compositae). |
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radiant 2 |
= radial, radiate, stellate |
arrangement |
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Disposed about and mutually divergent from a common geometric center in two or three dimensions, thus collectively actinomorphic. |
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radiate 1 |
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architecture |
capitulum (head) |
Bearing one or more peripheral series of florets that are pistillate (either fertile or sterile) or neuter and that have zygomorphic corollas, and one or more central series of bisexual or functionally staminate florets that have actinomorphic corollas; in Asteraceae (Compositae). |
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radiate 2 |
= radial, radiant, stellate |
arrangement |
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Disposed about and mutually divergent from a common geometric center in two or three dimensions, thus collectively actinomorphic. |
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radical |
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insertion |
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Upon, arising from, or otherwise directly associated with the root. |
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radical |
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position |
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Upon, arising from, or otherwise directly associated with the root. |
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radicant |
= rooting |
architecture |
structure |
Developing adventitious roots; esp. stems or leaves. |
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radicate |
= rooted |
architecture |
plant |
Having one or more roots. |
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radicle |
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STRUCTURE |
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The primary root, or its primordium, in an embryo; the portion of an embryo axis that develops into the root. |
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radix pl. radices |
= root |
STRUCTURE |
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A vascularized axis that is not internally differentiated into nodes and internodes and that branches endogenously, serving for anchorage, absorption and/or storage; collectively, all those portions of a plant body not belonging (anatomically) to the shoot. See also adventitious root, climbing root, diffuse root, knee root, primary root, prop root, secondary root, stilt root. |
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raised |
> prominent, prominulous |
prominence |
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Protruding above the general level of the surrounding surface. |
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ramal |
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insertion |
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Upon or otherwise directly associated with the stem branches. |
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ramal |
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position |
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Upon or otherwise directly associated with the stem branches. |
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ramentaceous |
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pubescence |
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Of small, fragile, scarious, planate trichomes. |
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ramiform |
= branched, ramose, ramous |
architecture |
axis, laminar vein |
Dividing into or bearing branches. |
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ramose |
= branched, ramiform, ramous |
architecture |
axis, laminar vein |
Dividing into or bearing branches. |
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ramous |
= branched, ramiform, ramose |
architecture |
axis, laminar vein |
Dividing into or bearing branches. |
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rank |
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FEATURE |
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A sequence of lateral structures arising from the same axis at successive points along its length and diverging from it in the same direction. |
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…ranked |
= …stichous |
arrangement |
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Disposed along the axis in the number of distinct ranks indicated by the prefix; as in two-ranked. |
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ranunculaceous |
= anomocytic |
architecture |
stomate |
Lacking subsidiary cells. |