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centralium pl. centralia |
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FEATURE |
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A central longitudinal cavity within the seed; esp. in Arecaceae (Palmae). |
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rugulose |
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relief |
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Slightly or finely rugose (corrugate, wrinkled). |
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throat 1 |
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STRUCTURE |
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The far distal portion of a perianth, calyx, or corolla tube, or of a leaf sheath, surrounding the orifice of the tube or sheath, sometimes constricted relative to the diameter of the main body of the tube or sheath; except in disc florets of Asteraceae (Compositae). |
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cymulose |
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architecture |
inflorescence |
Comprising one or more cymules. |
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circinate 1 |
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solid shape |
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Terete and rolled downward from the apex in a tight coil. |
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ligulate 2 |
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architecture |
floret |
Bisexual with a zygomorphic corolla; in Asteraceae (Compositae). |
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staminodial |
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position |
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Upon or otherwise directly associated with the staminodes. |
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odor |
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CHARACTER |
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Olfactory stimulation. |
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trapeziform |
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plane shape |
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Four-sided and either asymmetrical or bilaterally symmetrical like a triangle truncated distally perpendicular to its central axis. |
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second glume |
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STRUCTURE |
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The upper (distal) member of a pair of small bracts inserted at the base of a grass (Poaceae) spikelet. |
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disc 2 var. disk |
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STRUCTURE |
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Collectively, the disc florets of a capitulum (head), or the surface presented by them. |
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floating 1 |
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habit |
plant |
Buoyant and growing entirely at or near the surface of water, not rooted in any substrate. |
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longitudinal 1 |
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dehiscence |
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Parallel to the central axis. |
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pseudoaxillary |
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position |
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Only apparently axillary; originally extraaxillary but displaced to the axil by differential growth during development. |
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septal |
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position |
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Upon or otherwise directly associated with the septum or septa. |
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dorsiventral |
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architecture |
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Having structurally distinct abaxial (dorsal) and adaxial (ventral) portions or aspects. |
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aestivation |
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CHARACTER |
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Disposition of perianth (undifferentiated), calyx, or corolla members in the bud. |
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marginal |
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insertion |
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Upon or otherwise directly associated with the margins. |
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shoot 2 |
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STRUCTURE |
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A vascularized axis that is differentiated into nodes and internodes and that branches exogenously from the former, together with any non-axial structures borne from it. |
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vallecular |
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insertion |
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In or otherwise directly associated with the valleculae; esp. in fruits of Apiaceae (Umbelliferae). |
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elaiosome |
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STRUCTURE |
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A fleshy outgrowth from the seed coat (testa) that contains a high proportion of oil, usually attracting ants for dispersal. |
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microphyllous |
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architecture |
plant |
Bearing microphylls. |
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isopetalous |
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architecture |
flower, perianth, corolla |
Having the petals essentially alike in size and shape. |
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peripheral |
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position |
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Upon or otherwise directly associated with the outer surfaces or regions of a three-dimensional structure. Although use of this term in two-dimensional contexts is technically correct, traditionally the term marginal is preferred in such cases. |
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ephemeral |
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duration |
plant |
Annual with a very short life span; germinating, growing, reproducing, and dying within a brief period of favorable conditions, the entire cycle being completed within a few weeks. |
