Category: R
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Rostellum
(In orchid flowers) a shelf- or beaklike projection on the orchid column, derived from the median stigma lobe, that separates the fertile stigmatic surface from the anther, thereby preventing autogamy and aiding in gluing the pollinia to the pollinator; Persistent stylar base on fruit; A slender projection, like the beak of a bird, in Orchidaceae…
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Rostellate
Ending in a small beak.
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Rosette
A circle of tightly packed leaves, a basal rosette is at ground level, spreading from a stem with short internodes at that point. A cluster of leaves or other organs arranged in a circle or disk, often in a basal position. A tuft of leaves or other organs resembling the arrangement of petals in a…
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Rose
(Colour) pink or light crimson [vague term, not recommended]. While roses are not typically thought of as herbs, they possess a uniquely exotic flavor that makes them an unparalleled ingredient for culinary purposes. The petals of a single rose are often utilized in the creation of fruit cups and jellies, while rose-flavored tea is also…
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Roridulate
With a covering of small waxy plates, and therefore appearing moist [unusual term, not recommended].
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Rootstock
Underground stems and/or roots, often perennating [imprecise term, not recommended]; Rhizome, dorsiventral stem on or below ground sending out rootlets and distally leaves. That portion of the stem where it joins the root. The understock of a grafted plant; the base of a perennial where the roots grow. The erect underground stem and roots of…
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Root tuber
Thickened part of root used for storage.
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Root sucker
Shoot arising from adventitious buds on root.
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Root nodules
Small rounded bodies on the roots, usually containing bacteria that fix nitrogen from the air.
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Rootlet
Narrow root; Branch of a root.