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synangium pl. synangia |
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STRUCTURE |
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A compound sporangium; an aggregation of coherent sporangia, the whole multilocular. |
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derivation |
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CHARACTER |
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Ontogenetic origin. |
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ochrea |
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STRUCTURE |
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See ocrea. |
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supervolute |
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vernation |
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Each with one side rolled adaxially inward from the margin and enveloped by the abaxially rolled opposite side. |
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ocrea pl. ocreae var. ochrea |
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STRUCTURE |
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A tubular sheath that encircles a stem at a node, subtending a petiole; thought to have arisen evolutionarily by lateral fusion of two stipules; in Polygonaceae. |
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oblanceolate |
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plane shape |
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Inversely lanceolate (lancehead-shaped). |
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thyrse |
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nominative |
inflorescence |
An elongate, indeterminate main axis bearing numerous lateral branches, each the principal axis of a cymose subdivision. |
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evergreen |
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habit |
plant |
Perennial and bearing some viable leaves at all times during the yearly cycle. |
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palmatipinnate |
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architecture |
foliaceous structure |
Compound with two orders of leaflets, the first order palmate, the second pinnate. |
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ternate |
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architecture |
foliaceous structure |
Palmate with three leaflets. |
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epipetalous |
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insertion |
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Upon the petals, or partially adnate thereto and apparently arising therefrom. |
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filamentous |
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texture |
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Composed of filiform (thread-like) strands with no intervening tissue. |
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perfoliate |
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architecture |
foliaceous structure |
Having a sessile lamina (blade) that uninterruptedly encircles the bearing axis, which thus passes through it at some point within the margin. See also amplexicaulous, connate-perfoliate. |
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fasciate(d) |
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fusion |
equivalent structures |
Abnormally proliferated in size and/or number and more or less connate, the result often monstrous. |
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pneumatophore |
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STRUCTURE |
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A structurally and functionally specialized root serving as an aboveground aerating organ; found in some woody taxa of wet habitats, notably some mangroves. |
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follicetum pl. folliceta |
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STRUCTURE |
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An aggregate of follicles produced from a single flower with multiple simple pistils. |
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pith |
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STRUCTURE |
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The central ground tissue of a stem or, when present, of a root, consisting of thin-walled parenchyma cells; distinct and more or less soft and spongy relative to the other tissues of the axis; sometimes partly or wholly degenerating after secondary growth has begun. |
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flexuose |
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course |
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See flexuous. |
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pseudoaxillary |
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insertion |
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Only apparently axillary; originally extraaxillary but displaced to the axil by differential growth during development. |
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gigantic |
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size |
plant |
Strongly enlarged; unusually or unexpectedly very large throughout. |
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prickly |
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architecture |
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Bearing prickles. |
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asymmetric(al) 1 |
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solid shape |
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Not divisible into essentially equal halves along any line or plane. |
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radicle |
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STRUCTURE |
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The primary root, or its primordium, in an embryo; the portion of an embryo axis that develops into the root. |
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rhizophore |
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STRUCTURE |
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A stem branch that bears no leaves and from which roots eventually arise; esp. in Selaginellaceae. |
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barbed 1 |
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apex |
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Terminated by a small, relatively stiff, acutely reflexed, hook-like structure. |
