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actinodromous |
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venation |
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Having three or more primary veins that diverge radially from a point at or above the base of the blade and run toward the margin, reaching it or not. |
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areole 1 |
= areola |
STRUCTURE |
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Any distinctive surficial discontinuity of generally circular outline, whether concave, flush, or convex; when protuberant, sometimes bearing trichomes or spines, as in some Cactaceae. This term is used only when such entities are deemed structurally distinctive enough to merit description in their own rights, rather than as aspects of the surface. |
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bracteole 1 |
= bractlet; < bract |
STRUCTURE |
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A diminutive bract, or a bract that is smaller than others present. |
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node |
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STRUCTURE |
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One of the evident sectors of a stem that occur sequentially along its length and from which leaves (megaphylls) and lateral branches arise exogenously. The anatomy of nodes differs from, but is not abruptly distinct longitudinally from, that of the intervening sectors (internodes), with which it is smoothly confluent and from which is distinguished by the lateral transit and egress of vascular traces interconnecting the stem and the leaves and branches that it bears. |
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corniculum pl. cornicula |
= horn |
STRUCTURE |
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A straight or curved, slenderly conic or conoidal protrusion or terminal portion that resembles an animal horn. |
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pollen |
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STRUCTURE |
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Collectively, the spores or grains produced within the thecae of anthers, each containing a very small microgametophyte (or its evolutionary homologue); serving as disseminules from which microgametes are released after transport to a receptive micropylar pollen droplet (in Pinophyta) or stigma (in Magnoliophyta) by a variety of vectors, notably wind, water, insects, bats, and birds. |
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epidermis pl. epidermides, epidermises |
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STRUCTURE |
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The anatomically distinct, outermost, living tissue that encloses and protects the other tissues of a plant organ or part, usually overlaid by an exuded waxy cuticle; resulting from primary growth, disrupted and shed as a consequence of secondary growth if that occurs; consisting mainly of cells not further specialized, otherwise including various types of more specialized cells associated with trichomes and stomates. |
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scallop |
= crena |
FEATURE |
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A rounded, marginal convexity or concavity in a series of such that alternate regularly and are oriented more or less perpendicular to the generalized perimeter of a laminar structure. See also sawtooth, sawtoothlet, scalloplet (crenule), tooth (dens), toothlet. |
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stomate-bearing |
= stomatiferous |
architecture |
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Having stomates present in the epidermis. |
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inconspicuous |
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manifestation |
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Not prominently evident. |
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tepal |
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STRUCTURE |
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Any member of an undifferentiated perianth; may be green and foliaceous or colored and petaloid, distinct or else connate with one or more others, and/or free or else adnate with one or more other floral structures. |
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stomatiferous |
= stomate-bearing |
architecture |
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Having stomates present in the epidermis. |
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apex pl. apices |
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CHARACTER |
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Configuration of the uppermost, distal, or terminal portion of a structure, its extent determined somewhat subjectively in relation to the shape of the structure as a whole. The concept of apex varies from one descriptive context to another, since the apex is not a clearly delimited, morphologically distinct entity. The terms for describing apical condition are not strictly coordinate logically — some are more inclusive than others, some describe conditions involving what can be regarded as appendages, and some refer to the apex in a developmental as well as a strictly topological sense — and precise characterization may require using more than one descriptor. The semantic antecedent of some descriptors is "apex," whereas the antecedent of others is the structure as a whole (e.g., leaf ). |
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palea 1 pl. paleae, paleas |
= pale, palet, receptacular bract |
STRUCTURE |
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A small papery (chartaceous) to membranous bract borne on the compound receptacle (torus) of a capitulum (head) in Asteraceae (Compositae). |
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congested |
= compact, crowded |
architecture |
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Having equivalent constituent parts disposed very near to one another. |
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quadr(i)… |
= four-…, tetra… |
prefix |
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Indicating presence of or constitution by four entities of the type denoted by the term's stem; as in quadrangular, quadrilocular. |
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elliptic(al) 2 |
= oval |
plane shape |
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Elongate, widest at the middle, and symmetrically convex-attenuate to rounded ends. See also oblong. |
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fine-pitted |
= foveolate, scrobiculate |
relief |
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Finely pitted (foveate). |
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sigmoid 1 |
= S-shaped |
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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glochidium pl. glochidia |
= glochid; < bristle, capillus, hair, seta, trichome |
STRUCTURE |
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A capillus (hair) or bristle (seta) that bears one or more barbs; esp. in Cactaceae. |
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stellate 3 |
= star-shaped |
solid shape |
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Having a distal aspect like the stylized shape of a star; stipitate or sessile with elongate branches or appendages radiating widely in three dimensions from a common point at the apex of the proximal axis or, when sessile, upon the bearing surface. |
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hyaline |
= pellucid; > translucent, transparent |
coloration |
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Transmitting light uniformly. |
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symmetric(al) 1 |
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solid shape |
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Divisible into essentially equal halves along one or more lines or planes. |
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laevigate 1 |
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relief |
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Very smooth. |
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barbellula pl. barbellulae |
= barbellule |
STRUCTURE |
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A small barbel (barbella); a very diminutive barb. |
