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rostellum 2 pl. rostella |
= beaklet |
STRUCTURE |
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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. |
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rostrate |
= beaked |
apex |
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Terminating in a relatively long, tapering, more or less rigid point. See also rostellate (small-beaked). |
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rostrum 1 pl. rostra |
= beak |
STRUCTURE |
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A relatively long, tapering, more or less rigid and pointed enation or termination. |
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rostrum 2 pl. rostra |
= beak |
STRUCTURE |
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The inner, horn-like segment of a coronal lobe; esp. in Asclepiadaceae. |
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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. |
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rotate |
= wheel-shaped |
solid shape |
perianth, calyx, corolla |
Having a very short, cupulate tube and a broad, divergent to divaricate limb; Resembling a wheel when viewed from the distal end. |
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rotund |
= globose, globular, orbicular, spheric(al), spheroid(al) |
solid shape |
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Uniformly convex, circular in any median section and in outline when viewed from any angle; like a sphere or globe. |
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rough 1 |
= scabrous |
pubescence |
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Of or bearing coarse, stiff, ascending, trichomes and markedly rough to the touch. |
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rough 2 |
= scabrate, scabrid, scabridous, scabrous |
relief |
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Having small, stout, stiff, more or less acute protrusions. |
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round |
= orbiculate, orbicular misapplied |
plane shape |
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Circular. |
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rounded |
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apex |
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Convex overall and more or less regularly curved. |
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rounded |
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base |
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Convex overall and more or less regularly curved. |
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rubiaceous |
= paracytic |
architecture |
stomate |
Having one or more subsidiary cells to either side, all oriented parallel to its long axis. |
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rudimentary |
= obsolete (not recommended); > vestigial |
manifestation |
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Not developing fully and not functional compared with corresponding structures in other taxa. |
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rugose |
= corrugate, wrinkled |
relief |
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Having irregular, narrow ridges or creases, the intervening areas flat to shallowly concave or convex, appearing overall as though crumpled and then spread out. See also rugulose. |
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rugulose |
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relief |
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Slightly or finely rugose (corrugate, wrinkled). |
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ruminate |
= chewed |
relief |
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Irregularly convoluted, as if chewed. |
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runcinate |
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plane shape |
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Basically obovate with a series of retrorse, acute lobes on either side, these diminishing in size toward the base. |
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runner |
= stolon |
STRUCTURE |
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A slender stem that grows horizontally upon or just beneath the ground surface, rooting at the nodes and giving rise to erect shoot segments at some nodes and/or at its apex. |
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runnering |
= sarmentose, stoloniferous |
architecture |
plant |
Producing runners (stolons), by means of which it propagates vegetatively. |
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S-shaped 1 |
= sigmoid |
course |
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Curved more or less regularly first in one direction and then in the opposite direction, like the letter S. |
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S-shaped 2 |
= sigmoid |
solid shape |
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Elongate with more or less constant width or diameter and curved more or less regularly first in one direction and then in the opposite direction, like the letter S. |
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saccate 1 |
= alate, vesiculate, winged |
architecture |
pollen grain |
Having lateral lobes or enations resembling sacs or somewhat inflated wings. |
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saccate 2 |
= bag-shaped, pouch-shaped, sack-shaped |
solid shape |
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Irregularly obovoid with an exterior aspect intermediate between inflated and flaccid; like a closed pouch or bag. |
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sack-shaped |
= bag-shaped, pouch-shaped, saccate |
solid shape |
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Irregularly obovoid with an exterior aspect intermediate between inflated and flaccid; like a closed pouch or bag. |