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haustorium pl. haustoria |
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STRUCTURE |
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An absorbing and anchoring organ, often root-like, excrescent from a vegetative part of a parasitic or hemiparasitic plant, by which the plant communicates intimately with and derives sustenance and support from its host plant, into whose tissues the haustorium intrudes. |
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pellucid |
= hyaline; > translucent, transparent |
coloration |
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Transmitting light uniformly. |
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female cone |
= macrostrobilus (not recommended), megastrobilus |
STRUCTURE |
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A cone (strobilus) whose fertile organs are all megasporophylls. |
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radical |
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insertion |
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Upon, arising from, or otherwise directly associated with the root. |
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depressed |
< flattened |
solid shape |
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Flattened distally, perpendicular to the longitudinal axis, as though pressed from the top, the external surface otherwise basically convex. Often used in combination with some other term that describes the overall shape exclusive of ("before") flattening, e.g., depressed-globose. See also compressed (complanate), obcompressed. |
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bifurcate |
< forked, furcate |
apex |
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Having two terminal, antrorse branches or divisions arising from a common point or level, like the prongs of a fork. |
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vestigial |
< obsolete (not recommended), rudimentary |
manifestation |
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Not developing fully and not functional compared with corresponding structures in other taxa, and thought to have devolved to that state from a fully developed and functional structure in an ancestral taxon. |
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pliable |
= flexible, pliant, supple |
texture |
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Able to bend over its length and/or breadth without structural disruption. |
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taeniate |
= tapeworm-shaped |
solid shape |
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Slender, elongate, basically cylindric or compressed-cylindric with shallow, narrow, more or less regular constrictions along its length, the whole apparently segmented and straight or variously curved. |
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fringe |
= fimbria |
STRUCTURE |
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A marginal series or cycle of regular, slender, closely adjacent, more or less flexible segments or protrusions, when treated as an aggregate structure. |
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ligneous |
= woody |
texture |
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Of or resembling xylem (wood). |
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rostellum 2 pl. rostella |
= beaklet |
STRUCTURE |
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A sterile excrescent stigma lobe protruding between the anther and the functional stigma lobes of a column; sometimes forming one or more viscidia at pollinium maturity; esp. in Orchidaceae. |
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coloration |
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CHARACTER |
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Hue(s), intensity(ies), and/or pattern (if any) of coloring. When more than one hue and/or intensity is involved, a term describing the pattern of contrast will be applicable, and the description as a whole should be phrased to indicate the particular role of each in the pattern; e.g., "ovaries striate, yellow on green"; "petals pink, spotted yellow basally"; "sepals green, suffused with red". |
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obsolete (not recommended) |
= rudimentary; > vestigial |
manifestation |
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Not developing fully and not functional compared with corresponding structures in other taxa. |
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stipule scar |
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FEATURE |
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A scar on a stem or petiole due to abscission of a stipule; having an outline like that of a transverse section through the base of the stipule inserted there; variously disposed, usually in pairs, adjacent to a point of leaf insertion, sometimes confluent with the leaf scar, sometimes confluent with stipule scars associated with an opposite leaf, the two sets of scars then more or less encircling the axis. |
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pulvinus pl. pulvini |
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STRUCTURE |
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A short, cushion-like swelling at the junction of stem and leaf or of inflorescence axis and branch. |
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cymbiform |
= boat-shaped, navicular |
solid shape |
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Like the generalized form of a boat hull, the walls relatively thin to moderately thick, the interior essentially empty and open along one side. |
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triple-… |
= thrice-…, tri-… |
prefix |
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Indicating presence of three hierarchical orders of the type of entity or pattern denoted by the term's stem; as in triple-palmate. See also three-…. |
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capillate |
= capillary, hair-like |
solid shape |
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Finely filiform; like a hair. |
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megastrobilus pl. megastrobili |
= female cone, macrostrobilus (not recommended) |
STRUCTURE |
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A strobilus (cone) whose fertile organs are all megasporophylls. |
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valvate 1 |
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aestivation |
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Whorled and with members not overlapping, adjacent members laterally contiguous at their margins. |
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segmented |
? cleft, dissected, divided, lobed, lobate, parted, partite |
plane shape |
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Having two or more major component sectors or peripheral protrusions that are delimited by concavities in the surface or margin and that are not proximally distinct from the remainder of the whole. The meanings of this term and its approximate synonyms sometimes have been supposed to differ according to the depth of the delimiting concavities relative to the midline or midpoint of the overall structure, and/or to the shape or proportions of the protusions or sectors; however, there has been little consistency in the applications of the various terms according to such distinctions, which are ones only of degree and are necessarily arbitrary in any case. In general usage, these terms differ only indistinctly and connotatively: cleft, lobed (or lobate), parted (or partite) and segmented tend to connote fewer protrusions or sectors; lobate usually connotes as well a generally rounded shape; dissected tends to connote more numerous sectors that are elongate and angular. See also cut (incised, lacerate, torn), laciniate (slashed). |
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craspedodromous, simple- |
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venation |
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Having a midvein that branches to either side along the length of the lamina, the secondary veins and their branches all running toward and terminating at the margin. |
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papyraceous |
= chartaceous, papery |
texture |
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Very thin, flexible, and readily torn; like paper. See also membranaceous (membranous), pergamentaceous (parchment-like). |
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crassate |
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architecture |
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Relatively thick for the type of structure or in the taxonomic context. |
