lumen pl. lumina |
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FEATURE |
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A space enclosed by the wall(s) or membrane(s) of a structure. |
suprabracteal |
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position |
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Upon the axes, each directly above (distal to) and very near a point of bract insertion. |
connate |
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fusion |
equivalent structures |
Intimately fused, with strong histological continuity. |
solitary 1 |
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arrangement |
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Disposed singly, each remote from any others. |
knee 2 |
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STRUCTURE |
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An emergent portion of an otherwise normally submerged secondary root of a wetland tree, resembling a bent human knee. |
canalicular |
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position |
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Upon or otherwise directly associated with the channel of a petiole or petiolule. |
oblique 1 |
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base |
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Asymmetric about its longitudinal axis. |
unifacial |
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architecture |
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Having two opposite broad surfaces that are essentially similar in appearance. |
maturation |
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CHARACTER |
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Timing of the attainment of functional maturity, sometimes relative to other structures, sometimes as to constituent structures relative to each other. |
extent |
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CHARACTER |
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Reach of the septum or septa within the ovary or fruit, relative to the ovary wall or pericarp and its center. |
spinulose |
|
architecture |
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Finely spinose. |
duration |
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CHARACTER |
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Extent of lifetime, or persistence and physical state after maturation. |
follicle |
|
nominative |
fruit |
Dry, longitudinally dehiscent, one-locular, one- to many-seeded and derived from a single, superior, simple ovary; dehiscing along a single adaxial suture. |
fenestrate |
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architecture |
pollen grain |
Having more or less isodiametric, regularly disposed lacunae. |
accrescent |
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duration |
structure |
Increasing further in size after the bearing structure has become functionally mature; esp. a calyx after anthesis. |
apolar |
|
architecture |
pollen grain, spore |
Lacking morphologically evident polarity. |
laminate |
|
architecture |
foliaceous structure |
Having an expanded, more or less planate, distal portion (lamina or blade). |
septate 2 |
|
architecture |
trichome |
Unicellular to multicellular with transverse partitions (septa) that are common cell walls (intercellular) and/or intrusions from longitudinal cell walls (intracellular). |
prickle |
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STRUCTURE |
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Any unvascularized spine-like enation originating in the epidermis, cortex, or mesophyll of any shoot part. See also spine, thorn. |
axillary |
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position |
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Within the axil; nodal and at or very close to the vertex of the distal angle between a lateral structure, especially a leaf, and the axis that bears it. |
herbaceous 1 |
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habit |
plant |
Having no significant degree of secondary growth in any part of the shoot, which thus does not develop woody (lignified) tissue. |
inferior 2 |
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position |
ovary |
Wholly enclosed by a floral tube casing, the distal portions of the perianth and/or androecium thus arising from its apex. |
toothlet |
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STRUCTURE |
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A diminutive tooth (dens). See also sawtooth, sawtoothlet, scallop (crena), scalloplet (crenule). |
stipel |
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STRUCTURE |
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A stipular analogue subtending a leaflet. |
microsporangium pl. microsporangia |
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STRUCTURE |
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A sporangium that produces microspores. |