sorus pl. sori |
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STRUCTURE |
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A cluster of sporangia borne upon a fertile frond, usually on its abaxial surface; often covered during maturation by a protective membrane, the indusium, that is an outgrowth from the epidermis; in Polypodiophyta. |
dotted 2 |
= punctate |
relief |
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Having small, round, shallow depressions or low protrusions. See also small-dotted (puncticulate). |
…parted |
? …cleft, …fid, …lobate, …lobed, …partite, …segmented |
plane shape |
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Having the number of lobes, divisions or segments indicated by the prefix; as in five-parted. |
sword-shaped 1 |
= ensate |
plane shape |
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Elongate and moderately slender, broadest at the base and gradually attenuate to a short, more strongly attenuate, acute apex; like the outline of the lateral face of a broadsword blade. |
epiphyllous |
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insertion |
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Upon the leaves, or partially adnate thereto and apparently arising therefrom. |
rhytidomal |
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position |
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Within, upon, or otherwise directly associated with the bark. |
stellate 2 |
= star-shaped |
plane shape |
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Having four or more intersecting radiate lobes or portions, each distally slender; like the stylized outline of a star. |
pith |
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STRUCTURE |
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The central ground tissue of a stem or, when present, of a root, consisting of thin-walled parenchyma cells; distinct and more or less soft and spongy relative to the other tissues of the axis; sometimes partly or wholly degenerating after secondary growth has begun. |
balding |
= glabrescent |
pubescence |
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Becoming bald (glabrous, psilate) with age. |
pseudoaxillary |
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insertion |
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Only apparently axillary; originally extraaxillary but displaced to the axil by differential growth during development. |
…cellular |
= …celled |
architecture |
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Having the number of cells indicated by the prefix; as in bicellular, multicellular, oligocellular. |
leftward |
= sinistrorse |
orientation |
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Directed to the left, relative to the direction of growth along an explicit or implicit axis of reference. See also rightward (dextrorse). |
torus 2 pl. tori |
= receptacle |
STRUCTURE |
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The short, expanded, compound axial structure surmounting a peduncle and basal to two or more flowers, or to the florets of a capitulum (head) in Asteraceae (Compositae), where it may bear paleae (receptacular bracts), scales, bristles, trichomes, or subulate enations, and may be smooth or variously pitted (alveolate, foveolate). |
firm |
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texture |
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Yielding under only moderately strong pressure; only slightly deformable without internal structural disruption. |
disciform 1 |
= discoid |
solid shape |
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Relatively thin with two round, plane or convex, opposite broad faces and a rounded circumferential edge; like a disc. See also lenticular (biconvex, lens-shaped), meniscoid, placentiform (placenta-shaped), trochlear (pulley-wheel-shaped). |
pallid |
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coloration |
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Relatively pale; not strongly colored. |
inflexed |
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orientation |
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Bent adaxially at some point along its length. |
suffused |
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coloration |
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Having two or more hues, shades, and/or intensities intermingled, the contrasting components distinguishable only submacroscopically. |
broom-shaped |
= muscariform, penicillate |
solid shape |
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Having a proximal axis that bears a distal cluster of elongate slender branches or appendages, these variously ascending to erect; like a broom. |
embryotega pl. embryotegae, embryotegas |
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STRUCTURE |
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A small, hardened, lid-like portion of the testa (seed coat) at the micropyle of some seeds, detaching at germination. |
reniform 1 |
= kidney-shaped |
plane shape |
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Broadly elongate and arcuate, each end bluntly rounded; like the generalized outline of the broad face of a human kidney. |
comb-shaped |
= pectinate |
plane shape |
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Finely divided, the divisions slender, oriented more or less perpendicular to the central axis, and resembling the teeth of a comb. |
massula pl. massulae |
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STRUCTURE |
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A body of coherent pollen grains, dispersed as a unit; esp. in Asclepiadaceae, Orchidaceae. |
unilateral 2 |
= one-sided |
orientation |
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Disposed or directed toward one side only. |
nectar |
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SUBSTANCE |
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An aqueous exudate of high sugar content. |