|
rosulate |
= rosetted |
arrangement |
leaves |
Forming a rosette; strongly congested and disposed radially about the main stem at or very near its base, seeming to arise at the same level and often overlapping laterally; esp. in perennial herbs. |
|
rostrum 2 pl. rostra |
= beak |
STRUCTURE |
|
The inner, horn-like segment of a coronal lobe; esp. in Asclepiadaceae. |
|
rostrum 1 pl. rostra |
= beak |
STRUCTURE |
|
A relatively long, tapering, more or less rigid and pointed enation or termination. |
|
rostrate |
= beaked |
apex |
|
Terminating in a relatively long, tapering, more or less rigid point. See also rostellate (small-beaked). |
|
rostellum 2 pl. rostella |
= beaklet |
STRUCTURE |
|
A sterile excrescent stigma lobe protruding between the anther and the functional stigma lobes of a column; sometimes forming one or more viscidia at pollinium maturity; esp. in Orchidaceae. |
|
rostellum 1 pl. rostella |
= beaklet |
STRUCTURE |
|
A small rostrum (beak). |
|
rostellate |
= small-beaked |
apex |
|
Diminutively rostrate (beaked). |
|
rosetted |
= rosulate |
arrangement |
leaves |
Forming a rosette; strongly congested and disposed in radial symmetry about the main stem at or very near its base, seeming to arise at the same level and often overlapping laterally; esp. in perennial herbs. |
|
rosette |
|
STRUCTURE |
|
A set of leaves that are strongly congested and disposed in radial symmetry about the main stem at or very near its base, seeming to arise at the same level and often overlapping laterally; esp. the overwintering leaves of perennial herbs. |
|
rootstock |
= rhizome |
STRUCTURE |
|
An underground, usually horizontal stem, often superficially resembling a root but easily distinguished by the presence of nodes, from which it branches exogenously to produce the aboveground portion(s) of the shoot. |
|
rootless |
= eradicate |
architecture |
plant |
Lacking a root. |
|
rooting |
= radicant |
architecture |
structure |
Developing adventitious roots; esp. stems or leaves. |
|
rooted |
= radicate |
architecture |
plant |
Having one or more roots. |
|
root 2 |
= radix |
STRUCTURE |
|
A vascularized, primary or higher-order (branch) axis that is not differentiated into nodes and internodes and that branches endogenously, together with any non-axial structures borne from it; usually growing below ground level, but sometimes structurally and functionally specialized and growing wholly or partly aboveground (e.g. aerial root, knee root, pneumatophore). |
|
root 1 |
|
STRUCTURE |
|
Collectively, all those portions of a plant body that are anatomically distinct from the shoot, the component axes not differentiated into nodes and internodes, and branching endogenously. |
|
ringent |
= gaping, personate |
architecture |
corolla |
Bilabiate with the upper lip inwardly arcuate, the lower lip prominent and appressed to the upper at the level of the throat or junction of tube and limb, which is thus normally occluded but which gapes, resembling an open mouth, when the whole is compressed laterally. |
|
ringed |
|
relief |
bark |
Fissured, mainly horizontally, with at least some of the fissures individually encircling the stem more or less completely. |
|
ring-shaped |
= annular |
solid shape |
|
More or less evenly tubular in a closed circle; like a ring or doughnut. |
|
ring-porous |
|
porosity |
|
Heterogeneously porous, with macroscopically distinct concentric seasonal growth increments (rings), each with numerous large vessels toward the inside and fewer and smaller ones toward the outside. |
|
rigid |
= rigent, stiff |
texture |
|
Strongly resisting deformation over its length. |
|
rightward |
= dextrorse |
orientation |
|
Directed to the right, relative to the direction of growth along an explicit or implicit axis of reference. See also leftward (sinistrorse). |
|
rigent |
= rigid, stiff |
texture |
|
Strongly resisting deformation over its length. |
|
ridged |
|
solid shape |
|
Having one or more ridges; esp. fruits of Apiaceae (Umbelliferae). |
|
ridge |
|
FEATURE |
|
A very narrow, elongate, relatively low protrusion; esp. on fruits in Apiaceae (Umbelliferae). |
|
ribbed 2 |
|
solid shape |
|
Having two or more prominent, elongate, relatively narrow, essentially parallel protrusions that extend over all or most of its length or circumference. |
