semicraspedodromous |
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venation |
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Having a single median primary vein that branches to either side along the length of the lamina, each secondary vein running thence toward and bifurcate near the margin, one branch terminating at the margin, the other upwardly arcuate and merging with the superadjacent secondary vein, thus forming one of a series of marginal loops. |
velamen pl. velamina |
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STRUCTURE |
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A thin, often chartaceous (papery, papyraceous) or pergamentaceous (parchment-like), outermost tissue layer of an aerial root; esp. in Orchidaceae. |
prickly |
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architecture |
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Bearing prickles. |
barbellate |
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architecture |
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Bearing one or more barbels. |
inflorescence 1 |
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architecture |
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Mode or progressive pattern of bearing flowers; most appropriately described using adjectival terms. |
obdeltoid |
< three-angled, trigonous, triquetrous |
solid shape |
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Three-angled (trigonous, triquetrous), broadest distally, and regularly attenuate to an angular base; inversely deltoid. |
tufted 2 |
> floccose |
pubescence |
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Of or bearing tufts of soft, fine, capillate trichomes that rub off easily. |
partite |
? cleft, dissected, divided, lobate, lobed, parted, segmented |
solid shape |
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Having two or more 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 protrusions 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). |
macrostrobilus pl. macrostrobili (not recommended) |
= female cone, megastrobilus |
STRUCTURE |
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A strobilus (cone) whose fertile organs are all megasporophylls. |
canalicular |
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insertion |
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Upon or otherwise directly associated with the channel of a petiole or petiolule. |
punctum pl. puncta |
= dot |
FEATURE |
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A small, generally round sector of distinct coloration or relief. |
polished |
= glossy, laevigate, lustrous, shining, shiny |
reflectance |
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Uniformly reflecting a high proportion of incident light at all angles. |
torn |
= cut, incised, lacerate; > laciniate, slashed |
plane shape |
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Having straight to irregular lines of separation extending inward from the margin. See also cleft (dissected, divided, lobate, lobed, parted, partite, segmented). |
bulbel |
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STRUCTURE |
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A comparatively small bulb branching laterally from a larger, currently primary one. |
attenuate 2 |
= tapered |
solid shape |
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Gradually diminishing in breadth or diameter from one end to the other. |
…lobate |
? …cleft, …fid, …lobed, …parted, …partite, …segmented |
plane shape |
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Having the number of lobes indicated by the prefix; as in bilobate. |
dehiscence |
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CHARACTER |
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Mode of opening (splitting or forming apertures). |
comb-shaped |
= pectinate |
plane shape |
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Finely divided, the divisions slender, oriented more or less perpendicular to the central axis, and resembling the teeth of a comb. |
sporangium pl. sporangia |
= spore case |
STRUCTURE |
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A spore-producing organ; basically capsular, often supported by a slender stalk (sporangiophore), often operculate (lidded). In Bryophyta and Polypodiophyta, a distinct portion of the sporangial wall effects regular dehiscence at maturity. Sporangia or their equivalents are also present, but of little or no descriptive significance, in seed plants. |
small-bristly |
= setulose |
pubescence |
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Finely setose (hispid). |
gynandrium pl. gynandria |
= column, gynostemium |
STRUCTURE |
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A central floral structure consisting of the partly to wholly fused (connate and adnate) androecium and gynoecium; esp. in Orchidaceae. |
cone |
= strobilus; > female cone, macrostrobilus (not recommended), male cone, megastrobilus, microstrobilus |
STRUCTURE |
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A compound or complex reproductive structure consisting of a central axis bearing congested imbricate sporophylls and sometimes also sterile bracts. |
fasciculate 2 |
= bundled (not recommended), fascicled |
arrangement |
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Disposed in one or more fascicles, the members of each inserted close together and only slightly if at all divergent from one another. |
wood |
= xylem |
STRUCTURE |
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The water-conducting and usually main supporting tissue of a plant or portion thereof, characterized by the presence of tracheary elements (tracheids and sometimes vessel elements); the lignified tissue of a plant or component structure, composed almost entirely of secondary tissue, i.e., that derived by secondary or lateral growth from a cambium in structures a season or more old. As commonly used, the term wood generally refers only to secondary xylem, which constitutes the bulk of a mature woody stem, but it properly refers also to primary xylem, wherever found. See also sapwood, heartwood. |
tetrad |
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STRUCTURE |
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A group of four pollen grains originating from a single pollen mother cell. |