ray 2 |
= lamina |
STRUCTURE |
|
The distal, relatively flat portion of the corolla of a ray floret, terminating in 0--4 teeth or lobes; in Asteraceae (Compositae). |
ray 1 |
< primary axis |
STRUCTURE |
|
A first-order axis within a compound umbel. |
raphides sing. raphis |
|
STRUCTURE |
|
Needle-like crystals of calcium oxalate contained within the cells of some plants; esp. in Araceae. |
raphe |
|
STRUCTURE |
|
That portion of the funicle adnate to the integument of an anatropous ovule; represented by a longitudinal ridge or other discontinuity in the surface and/or color of the testa on one side of the mature seed. |
raphal |
|
derivation |
aril |
Produced or resulting from a modification of the raphe. |
ranunculaceous |
= anomocytic |
architecture |
stomate |
Lacking subsidiary cells. |
rank |
|
FEATURE |
|
A sequence of lateral structures arising from the same axis at successive points along its length and diverging from it in the same direction. |
ramous |
= branched, ramiform, ramose |
architecture |
axis, laminar vein |
Dividing into or bearing branches. |
ramose |
= branched, ramiform, ramous |
architecture |
axis, laminar vein |
Dividing into or bearing branches. |
ramiform |
= branched, ramose, ramous |
architecture |
axis, laminar vein |
Dividing into or bearing branches. |
ramentaceous |
|
pubescence |
|
Of small, fragile, scarious, planate trichomes. |
ramal |
|
insertion |
|
Upon or otherwise directly associated with the stem branches. |
ramal |
|
position |
|
Upon or otherwise directly associated with the stem branches. |
raised |
> prominent, prominulous |
prominence |
|
Protruding above the general level of the surrounding surface. |
radix pl. radices |
= root |
STRUCTURE |
|
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. |
radicle |
|
STRUCTURE |
|
The primary root, or its primordium, in an embryo; the portion of an embryo axis that develops into the root. |
radicate |
= rooted |
architecture |
plant |
Having one or more roots. |
radicant |
= rooting |
architecture |
structure |
Developing adventitious roots; esp. stems or leaves. |
radical |
|
insertion |
|
Upon, arising from, or otherwise directly associated with the root. |
radical |
|
position |
|
Upon, arising from, or otherwise directly associated with the root. |
radiate 2 |
= radial, radiant, stellate |
arrangement |
|
Disposed about and mutually divergent from a common geometric center in two or three dimensions, thus collectively actinomorphic. |
radiate 1 |
|
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). |
radiant 2 |
= radial, radiate, stellate |
arrangement |
|
Disposed about and mutually divergent from a common geometric center in two or three dimensions, thus collectively actinomorphic. |
radiant 1 |
|
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). |
radial |
= radiant, radiate, stellate |
arrangement |
|
Disposed about and mutually divergent from a common geometric center in two or three dimensions, thus collectively actinomorphic. |