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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. |
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cincinnus pl. cincinni |
< helicoid cyme |
nominative |
inflorescence |
A tightly coiled helicoid cyme (bostryx) with the nodes approximate to congested and the pedicels very short or the flowers sessile. |
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septum pl. septa |
> dissepiment, replum, trabecula |
STRUCTURE |
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A topologically and/or texturally distinct wall or partition that separates chambers or locules within an ovary, fruit or sporangium. |
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trabecula pl. trabeculae |
< septum |
STRUCTURE |
|
A transverse wall or partition that fully or partially separates two chambers within a sporangium. |
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barb 2 |
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STRUCTURE |
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A trichome terminated by one or two small, relatively short, stiff, sharp, acutely reflexed appendages. |
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bristle 2 |
= seta; > glochid, glochidium; < trichome |
STRUCTURE |
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A trichome that is elongate, more or less straight, terete, fine-pointed, and stiff. |
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seta 2 pl. setae |
= bristle; > glochid, glochidium |
STRUCTURE |
|
A trichome that is elongate, slender, more or less straight, terete, fine-pointed, and stiff. |
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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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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). |
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shoot 2 |
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STRUCTURE |
|
A vascularized axis that is differentiated into nodes and internodes and that branches exogenously from the former, together with any non-axial structures borne from it. |
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radix pl. radices |
= root |
STRUCTURE |
|
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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root 2 |
= radix |
STRUCTURE |
|
A vascularized, primary or higher-order (branch) axis that is not differentiated into nodes and internodes and that branches endogenously, together with any non-axial structures borne from it; usually growing below ground level, but sometimes structurally and functionally specialized and growing wholly or partly aboveground (e.g. aerial root, knee root, pneumatophore). |
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adventitious bud |
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STRUCTURE |
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A vegetative or floral bud that arises directly from a root or from some site on a shoot other than a leaf axil or stem apex. |
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gemma pl. gemmae |
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STRUCTURE |
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A vegetative propagule by which a gametophyte reproduces asexually; produced by a process analogous to budding, from a more or less cupulate specialized area (gemmae cup) on the surface of the plant body (thallus); in Psilotophyta, Lycopodiophyta, Equisetophyta, Polypodiophyta. |
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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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ridge |
|
FEATURE |
|
A very narrow, elongate, relatively low protrusion; esp. on fruits in Apiaceae (Umbelliferae). |
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flagellum pl. flagella |
|
STRUCTURE |
|
A very slender whip-like structure that extends from the main body of an antherozoid and, by active undulation, propels the cell through a liquid medium. |
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floret |
|
STRUCTURE |
|
A very small, structurally specialized flower, especially when occurring in capitulum (head; Asteraceae), or in a spikelet (Poaceae), where it includes the immediately subtending bracts (lemma and palea). |
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dissepiment |
< septum; > replum |
STRUCTURE |
|
A wall or partition between adjacent locules of an ovary or fruit. |
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epicalyx pl. epicalyces |
= calyculus |
STRUCTURE |
|
A whorl of bracts immediately subtending (beneath or outside) a calyx. |
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calyculus 1 pl. calyculi |
= epicalyx |
STRUCTURE |
|
A whorl of bracts immediately subtending (beneath or outside) a calyx; literally, a little calyx. |
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cane |
< culm, stem |
STRUCTURE |
|
A woody, aboveground culm. Use of this term or culm instead of stem is a matter of tradition and preference, not of descriptive precision or necessity. |
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flexible |
= pliable, pliant, supple |
texture |
|
Able to bend over its length and/or breadth without structural disruption. |
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pliable |
= flexible, pliant, supple |
texture |
|
Able to bend over its length and/or breadth without structural disruption. |
|
pliant |
= flexible, pliable, supple |
texture |
|
Able to bend over its length and/or breadth without structural disruption. |
