beard |
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STRUCTURE |
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A growth of relatively long, erect, flexible, capillary trichomes from one or more limited sectors of a structure's surface. |
sellaeform |
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solid shape |
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See selliform. |
aciculate |
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coloration |
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Having fine, irregularly oriented, straight streaks of contrasting hue and/or intensity. |
simple 1 |
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architecture |
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Externally unitary and comprising only one basic morphological unit; not compound in either sense of that term. |
leaf scar |
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FEATURE |
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A scar on a twig or stem due to abscission of a megaphyll; having an outline like that of a transverse section through the base of the petiole, sheath, or blade that was inserted there. |
sub-basifixed |
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fixation |
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Attached just above its base. |
disarticulating |
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architecture |
axis |
Articulate(d) and with the main portions of the whole separating at the joints upon maturity or senescence. |
eccentric |
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position |
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Having a center or axis of symmetry not coincident with that of the context of reference. |
brachiate |
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architecture |
axis |
Having alternate, divaricate branches. |
episepalous |
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insertion |
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Upon the sepals, or partially adnate thereto and apparently arising therefrom. |
phyllopodium pl. phyllopodia |
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STRUCTURE |
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A stem-like axis composed of fused leaf bases; esp. in Arecaceae (Palmae), Musaceae. |
calyptra pl. calyptrae |
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STRUCTURE |
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A distal hood- or lid-like portion that detaches as a unit from the remainder of the structure; esp. in some Papaveraceae the unopened calyx that separates from the rest of the flower at anthesis. |
first glume |
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STRUCTURE |
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The lower (proximal) or sometimes solitary small bract inserted at the base of a grass (Poaceae) spikelet, the second glume, when present, inserted immediately above (distal to) it. |
pericolporate |
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architecture |
pollen grain |
Pericolpate, each groove containing a pore. |
polyadal |
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arrangement |
pollen |
Shed in groups of more than four, each group comprising grains from two or more original tetrads, the latter intact or not. |
vallecular |
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position |
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In or otherwise directly associated with the valleculae; esp. in fruits of Apiaceae (Umbelliferae). |
pseudoterminal |
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insertion |
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Only apparently terminal; originally subapical but displaced toward the apex by differential growth during development. |
prolate |
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plane shape |
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Symmetrically elongate parallel to the developmental or polar axis. |
cilium 2 pl. cilia |
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STRUCTURE |
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A motile hair- or whip-like structure extending from the surface of a cell. |
hemiepiphytic |
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habit |
plant |
Partially epiphytic; rooted in the ground but with stems growing upon and supported mainly by other plants. |
fusion |
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CHARACTER |
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Physical connection of equivalent or dissimilar structural entities (as recognized on evolutionary, morphological, anatomical, ontogenetic, and/or topological grounds). Terms that denote the interconnection of equivalent structures are predicated on a single collective subject and suffice in themselves to describe the condition; e.g., "sepals connate." However, those that denote the connection of dissimilar structures require explicit notation of each type of structure involved, in either a compound-subject construction or else a single-subject/object-of-preposition construction; e.g., "stamens and corolla adnate" or "stamens adnate to corolla." Qualifying detail is sometimes appropriate; e.g., "filaments connate basally," "filaments adnate to the petals over their lower halves." |
connate-perfoliate |
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architecture |
opposite laminar structures |
Having the bases in each pair fused and together encircling the bearing axis. See also amplexicaulous, perfoliate. |
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 ). |
ribbed 2 |
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solid shape |
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Having two or more prominent, elongate, relatively narrow, essentially parallel protrusions that extend over all or most of its length or circumference. |
homogamous 1 |
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maturation |
bisexual flower |
Having the androecium and gynoecium become functionally mature concurrently. |