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prothallus pl. prothalli |
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STRUCTURE |
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A very diminutive thallus that is reproductively mature and undergoes no further growth; in Polypodiophyta, Pinophyta. |
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coalescent |
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fusion |
equivalent and/or dissimilar structures |
Partially and irregularly coherent and/or adherent. |
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panicle |
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nominative |
inflorescence |
A compound (branched) raceme, the elongate main axis either determinate or indeterminate, its lateral branches racemose. |
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sepal |
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STRUCTURE |
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One of the one or more constituent members of a calyx; usually green and leaf-like, but sometimes with color and/or texture otherwise, sometimes petaloid; may be distinct or else connate with one or more others and/or may be free or else adnate to one or more other floral structures. |
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umbellate |
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architecture |
inflorescence |
Comprising one or more umbels. |
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adventitious |
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derivation |
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Arising more or less unpredictably from an organ, tissue, or site that is an unusual, abnormal, or atypical origin for structures of its type. |
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follicle |
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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. |
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mammose |
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solid shape |
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Having mammae. |
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complex |
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architecture |
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Comprising two or more basic structural entities, at least two of which are dissimilar. |
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inframedial |
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position |
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Slightly below the middle of the structure in point. |
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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. |
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amplexicaul |
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architecture |
foliaceous structure |
See amplexicaulous. |
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…merous |
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architecture |
compound or compound-complex structure |
Having the number of equivalent component parts indicated by the prefix (e.g., petals in a corolla), or having different component sets of equivalent parts of that number in each set (e.g., calyx and corolla in a perianth); as in monomerous, oligomerous, polymerous, tetramerous, trimerous. |
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contractile |
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architecture |
structure |
Diminishing in length, or acquiring the potential energy for a sudden decrease, due to the generation of internal tension during tissue development. |
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involute 2 |
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vernation |
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Each rolled adaxially from the lateral margins. |
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pericolporate |
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architecture |
pollen grain |
Pericolpate, each groove containing a pore. |
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vernation |
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CHARACTER |
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Disposition of leaves in the bud. |
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glandular 2 |
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exudation |
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Anatomically distinct and producing and exuding a particular substance. |
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motile |
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habit |
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Able to translocate by intrinsic means, as by flagellar propulsion. |
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capsule |
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nominative |
fruit |
Dry, longitudinally or poricidally dehiscent, and derived from a compound ovary with one or more locules; containing one or more seeds. See also pyxis. |
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equatorial ridge |
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FEATURE |
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A circumferential ring about a megaspore in the plane of its equator, raised above the remainder of the wall surface; in some heterosporous taxa of Polypodiophyta. |
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latex pl. latices, latexes |
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SUBSTANCE |
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A moderately viscous and sticky exudate, often milky, sometimes otherwise colored or clear. Overlaps conceptually with gum. |
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plated |
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relief |
bark |
Fissured in a more or less regular, anastomosing pattern with distinct, relatively large, undisturbed sectors intervening, the latter ultimately falling away more or less intact after attaining considerable thickness. |
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xylary |
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position |
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Within or otherwise directly associated with the wood. |
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exudation |
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CHARACTER |
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Discharged substance, as to type. |
