microsporangium pl. microsporangia |
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STRUCTURE |
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A sporangium that produces microspores. |
velum pl. vela |
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STRUCTURE |
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A membranous adaxial flap or fold of vegetative tissue wholly or partly covering the sporangial cavity of a sporophyll; in Isoëtaceae. |
globose |
= globular, orbicular, rotund, spheric(al), spheroid(al) |
solid shape |
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Uniformly convex, circular in any median section and in outline when viewed from any angle; like a globe or sphere. |
spathe |
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STRUCTURE |
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A usually relatively large, sometimes showy, foliose bract subtending and sometimes partially enclosing an inflorescence, esp. a spadicate one; in Liliidae (monocotyledons). |
…partite |
? …cleft, …fid, …lobate, …lobed, …parted, …segmented |
plane shape |
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Having the number of lobes, divisions or segments indicated by the prefix; as in tripartite. |
crumpled |
= corrugate |
aestivation |
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Having members tightly and irregularly folded, the whole appearing as though wadded upon emergence. |
symmetric(al) 1 |
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plane shape |
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Divisible into essentially equal halves along one or more lines or planes. |
epirhizal |
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position |
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Upon or arising from the roots. |
ridged |
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solid shape |
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Having one or more ridges; esp. fruits of Apiaceae (Umbelliferae). |
ceraceous 1 |
= cereous, waxen, waxy; > caesious, glaucescent, glaucous, pruinose |
coating |
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Covered with wax or a wax-like substance. |
obcordate |
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plane shape |
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Inversely cordate (heart-shaped). |
dimidiate |
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solid shape |
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Halved, figuratively; bilaterally asymmetric, nearly or wholly lacking one side as implicitly compared with some corresponding bilaterally symmetric structure, real or imagined. |
lenticel |
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STRUCTURE |
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A specialized, anatomically distinct structure within the periderm of a stem, consisting of comparatively spongy, sometimes suberized tissue distinct from others of the periderm; extending radially through the periderm and visible as a circular to elongate discontinuity in the color, texture, and/or relief of the outer surface of the stem; serving as a conduit for gas exchange between the stem interior and the atmosphere. |
bract 2 (strict sense) |
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STRUCTURE |
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Any primary or first-order lateral structure ontogenetically and anatomically analogous with, and therefore presumably homologous with, but relatively smaller than, a leaf, especially when subtending an inflorescence, other reproductive structure, or portion thereof; putatively, an evolutionarily reduced leaf. |
translucent |
< hyaline, pellucid |
coloration |
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Transmitting light uniformly and diffusely. See also transparent. |
five-… |
= penta… |
prefix |
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Indicating presence of or constitution by five entities of the type denoted by the term's stem; as in five-grooved, five-stamened, five-tepaled. |
scrotum-shaped |
= scrotiform |
solid shape |
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Saccate (bag-, pouch- or sack-shaped) and somewhat swollen bilaterally in the distal portion; like a scrotum. |
complex |
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architecture |
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Comprising two or more basic structural entities, at least two of which are dissimilar. |
infrabracteal |
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position |
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Upon the axis directly below a bract insertion. |
sunken |
> immersed, impressed |
prominence |
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Below the general level of the surrounding surface. |
endocarp |
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STRUCTURE |
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The innermost tissue layer of a pericarp. |
replum pl. repla |
< dissepiment, septum |
STRUCTURE |
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The persistent wall or partition that separates the two locules of a silicle or silique. |
sinuous |
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course |
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Regularly wavy in one plane, curved alternately and more or less regularly to either side. |
anadromous |
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venation |
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Having the first lateral vein in each pinna or primary segment of the frond arise from its midvein on the side toward the apex of the frond, the pinnule or secondary segment that it leads to often disproportionately larger than the next distal ones. |
crassate |
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architecture |
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Relatively thick for the type of structure or in the taxonomic context. |