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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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stipel |
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STRUCTURE |
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A stipular analogue subtending a leaflet. |
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anther |
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STRUCTURE |
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The fertile, loculate, pollen-bearing portion of a stamen, containing one, two, or four thecae (pollen sacs), when that portion is differentiated from and borne at the summit of a narrower supporting stalk (filament), or when such differentiation is deemed to have occurred in the evolutionary past with subsequent reduction of the filament (the anther then sessile and constituting the entirety of the stamen). |
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beaklet 1 |
= rostellum |
STRUCTURE |
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A small beak or rostrum. |
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microphyll |
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STRUCTURE |
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A small, lateral, leaf-like enation that, evolutionarily, is not a true leaf, i.e., whose vasculature, if any, consists of only a single median strand not ontogenetically integral with the vasculature of the bearing stem and not associated with leaf gaps in the stele of the stem; in Bryophyta, Psilotophyta, Lycopodiophyta, Equisetophyta. |
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calyculus 2 pl. calyculi |
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STRUCTURE |
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Collectively the bractlets (bracteoles) sometimes subtending (beneath or outside) the involucre in a capitulum (head); in Asteraceae (Compositae). |
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prothallus pl. prothalli |
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STRUCTURE |
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A very diminutive thallus that is reproductively mature and undergoes no further growth; in Polypodiophyta, Pinophyta. |
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sepal |
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STRUCTURE |
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One of the one or more constituent members of a calyx; usually green and leaf-like, but sometimes with color and/or texture otherwise, sometimes petaloid; may be distinct or else connate with one or more others and/or may be free or else adnate to one or more other floral structures. |
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funiculus pl. funiculi |
= funicle; < stalk |
STRUCTURE |
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A stalk that attaches an ovule to a placenta of the ovary wall. |
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spore leaf |
= sporophyll; > fertile frond |
STRUCTURE |
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A leaf or homologous structure that bears sporangia See also megasporophyll (macrosporophyll, not recommended), microsporophyll. |
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ascidium pl. ascidia |
= pitcher, pitcher-blade |
STRUCTURE |
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An ascidiform (pitcher-shaped) leaf blade, sometimes operculate (lidded), usually carnivorous; esp. in Nepenthaceae, Sarraceniaceae. |
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bud |
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STRUCTURE |
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A rudimentary, unexpanded stem, stem branch, inflorescence, inflorescence branch, or flower, or a combination thereof, in a resting state; enveloped or not by subtending protective scales. |
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costule |
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STRUCTURE |
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A longitudinal primary vein in a diminutive laminar structure, such as the blade of a leaflet, pinna or pinnule; a diminutive costa (rib). |
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style |
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STRUCTURE |
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A narrow, usually elongate, ontogenetically distal portion of a simple or compound pistil, overtopping the ovary and bearing one or more stigmas; arising from the summit of the ovary, but sometimes apparently from its base at maturity to ontogenetic displacement from its primordial distal position. In a compound pistil the various simple (carpellary) components of the style(s) may not be connate over their entire lengths; the pistil is then regarded as having a branched style or styles. |
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lepis pl. lepides |
= squama; < scale, trichome |
STRUCTURE |
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A relatively thick, planate trichome. See also squamella. |
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bole |
= trunk; < main stem, primary stem |
STRUCTURE |
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The relatively stout, columnar, main stem of a distinct aboveground portion of a tree. |
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nerve |
= vein; > costa, midnerve , midrib, midvein, rib |
STRUCTURE |
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A strand belonging to any except the ultimate (least in diameter) order of vasculature in a leaf or other foliaceous structure. See also lateral vein, primary vein, secondary vein, tertiary vein, veinlet. |
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radix pl. radices |
= root |
STRUCTURE |
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A vascularized axis that is not internally differentiated into nodes and internodes and that branches endogenously, serving for anchorage, absorption and/or storage; collectively, all those portions of a plant body not belonging (anatomically) to the shoot. See also adventitious root, climbing root, diffuse root, knee root, primary root, prop root, secondary root, stilt root. |
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sawtoothlet |
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STRUCTURE |
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A diminutive sawtooth. See also scallop (crena), scalloplet (crenule), tooth (dens), toothlet. |
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beaklet 2 |
= rostellum |
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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gland |
> nectary |
STRUCTURE |
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An anatomically distinct multicellular structure that produces and exudes a particular substance, or resembles those that do. |
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hood |
= cucullus |
STRUCTURE |
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A hood-shaped structure or component, esp. in an inflorescence or flower. |
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wall (fruit, ovary, pollen, spore) |
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STRUCTURE |
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The exterior layer of tissue(s) enclosing anatomically distinct interior tissues and sometimes fluid and/or one or more cavities. |
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calyptra pl. calyptrae |
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STRUCTURE |
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A distal hood- or lid-like portion that detaches as a unit from the remainder of the structure; esp. in some Papaveraceae the unopened calyx that separates from the rest of the flower at anthesis. |
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coccus pl. cocci |
= mericarp |
STRUCTURE |
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One of the segments of a dehisced schizocarp; usually one-seeded and itself indehiscent. |
