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asymmetric(al) 1 |
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architecture |
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Not divisible into essentially equal halves along any line or plane. |
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radical |
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position |
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Upon, arising from, or otherwise directly associated with the root. |
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subvalvate |
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dehiscence |
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Incompletely or partly valvate. |
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involucrate 2 |
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architecture |
capitulum (head) |
Having an involucre. |
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perianth tube |
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STRUCTURE |
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A relatively narrow, fully connate portion of a syntepalous (gamotepalous) perianth proximal to a broader portion (limb) that comprises the distinct or connate distal portions of the tepals. |
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sinus pl. sinus, sinuses |
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FEATURE |
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The space, indentation, or invagination (or, for some descriptive purposes, the outline thereof) between and delimiting any two consecutive or adjacent lobes or teeth of a structure. |
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barb 2 |
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STRUCTURE |
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A trichome terminated by one or two small, relatively short, stiff, sharp, acutely reflexed appendages. |
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surface |
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FEATURE |
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The exterior or bounding area or layer of any structure, regarded as being infinitely thin; usually described as to relief, reflectance, and/or vesture. |
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corymbose |
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architecture |
inflorescence |
Comprising one or more corymbs. |
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monolete |
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architecture |
spore |
Having a single linear tetrad scar (surficial ridge or angle resulting from ontogenetic coherence with others produced from the same spore mother cell). |
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pilose |
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pubescence |
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Bearing relatively sparse, soft, slender, more or less erect capillate trichomes. See also pilosulous. |
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berry |
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nominative |
fruit |
Indehiscent, few- to many-seeded, and derived from a single, simple or compound ovary; fleshy throughout except for the seeds. See also hesperidium, pepo. |
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neck (floral tube) |
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STRUCTURE |
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The solid, usually constricted portion of a floral tube sometimes present between casing and collar when those are both present. |
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acrodromous |
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venation |
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Having two or more primary and/or strongly developed secondary veins that diverge at or above the laminar base and are thence convergently arcuate toward the apex, reaching it or not. |
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lateral |
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insertion |
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To, toward, at, or upon a side, not apical or basal. |
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planoconcave |
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solid shape |
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Relatively thin with opposite broad faces, one plane and one concave. |
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extravaginal |
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insertion |
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Distal to or outside the leaf sheath. |
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haplomorphic |
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architecture |
flower |
Having the members of each set of basic floral structures numerous and spirally arranged, the flower hemispheric to conoidal overall. |
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thallus 2 pl. thalli |
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STRUCTURE |
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The main body of a gametophyte, bearing rhizoids, gametangia (antheridia and/or archegonia), and/or gemmae cups; usually thin and more or less planate, inconspicuous, and growing appressed to or beneath the substrate surface; in Psilotophyta, Lycopodiophyta, Equisetophyta, Polypodiophyta. See also prothallus. |
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leptosporangiate |
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reproduction |
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Having relatively small sporangia each of which develops from a single initial cell that, by periclinal division, gives rise to an outer and an inner cell, the former then giving rise to the entire sporangium, including contents and sporangiophore, the latter contributing nothing to it; in some Polypodiophyta. |
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herbaceous 2 |
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texture |
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Composed entirely of relatively soft, non-woody (unlignified) tissues derived from primary growth. |
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sawtooth |
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STRUCTURE |
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One of a series of regularly spaced, angular, marginal convexities oriented at an acute angle to the generalized perimeter of a laminar structure. See also sawtoothlet, scallop (crena), scalloplet (crenule), tooth, toothlet. |
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androgynous |
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reproduction |
taxon |
Monoecious, each inflorescence having a distal sector with only staminate flowers and a proximal sector with only pistillate ones. |
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campylodromous |
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venation |
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Having several primary and/or strongly developed secondary veins that diverge from a point or small area near the base of the blade and run thence ultimately toward the apex, recurving proximally, arcuate and converging distally, reaching the apex or not. |
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orientation |
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CHARACTER |
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Attitude or direction with respect to some explicit or implicit structure(s) or context. The lexicon relating to orientation includes some conceptually complex terms whose meanings also embrace aspects of structural composition or shape. Overlaps conceptually with arrangement, habit, insertion, position, and shape. |
