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lemma pl. lemmata, lemmas |
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STRUCTURE |
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The proximal bract of the (usually) two that immediately subtend the flower in a grass (Poaceae) floret; the other is the palea. |
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bladder |
= ampulla |
STRUCTURE |
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A small, membranous, hollow, flask-shaped, insectivorous structure borne on a submerged leaf; esp. in Lentibulariaceae. |
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enation |
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STRUCTURE |
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A relatively small outgrowth from an otherwise regular boundary or surface of a larger structure. |
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coma pl. comae, comas |
< tuft |
STRUCTURE |
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A prominent single tuft of relatively long and slender, flexible, capillate trichomes; esp. from a seed, as in Asclepias (Asclepiadaceae). |
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phyllopodium pl. phyllopodia |
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STRUCTURE |
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A stem-like axis composed of fused leaf bases; esp. in Arecaceae (Palmae), Musaceae. |
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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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seta 2 pl. setae |
= bristle; > glochid, glochidium |
STRUCTURE |
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A trichome that is elongate, slender, more or less straight, terete, fine-pointed, and stiff. |
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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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stalk |
> androgynophore, carpophore, columella, funicle, funiculus, gynophore, hypogynium, pedicel, peduncle, petiole, petiolule, sporangiophore, stipe (Orchidaceae), stipe (broad sense, not recommended); >< androphore |
STRUCTURE |
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A supporting axis or column that bears a structure at its apex; may be ontogenetically distinct from the structure that it bears, or may be the basal portion of an ontogenetic entity that includes both the stalk and the structure that it bears; usually narrower than the structure that it bears. |
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knee 1 |
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STRUCTURE |
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An abrupt bend in an axial or other elongate structure. |
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membrane |
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STRUCTURE |
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A relatively thin layer of tissue that covers or separates other, different tissue(s) and/or empty space(s). |
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perianth |
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STRUCTURE |
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Collectively, all the sterile, primary, lateral organs (tepals, or sepals and/or petals) of a flower; inserted upon the floral axis immediately beneath (proximal to) the reproductive organs (androecium and/or gynoecium) and surrounding them, often protectively; lacking in some taxa; the individual members typically laminar and more or less foliaceous; widely regarded as consisting of the evolutionarily modified leaves of a fertile shoot; the constituent members undifferentiated with respect to one another, or else differentiated into more or less distinct floral envelopes (calyx and corolla), one or the other of which is deemed lacking in some taxa due to evolutionary reduction following differentiation. |
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tooth pl. teeth |
= dens |
STRUCTURE |
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One of a series of regularly spaced, angular, marginal convexities oriented more or less perpendicular to the generalized perimeter of a laminar structure. See also sawtooth, sawtoothlet, scallop (crena), scalloplet (crenule), toothlet. |
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vasculature |
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STRUCTURE |
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The vascular strands of all orders (veins and veinlets) in a particular part or organ, regarded collectively; consisting of conducting tissues (xylem, phloem) and associated supporting and enclosing tissues (e.g., sclerenchyma, collenchyma). |
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mamilla pl. mamillae |
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STRUCTURE |
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A nipple- or teat-shaped protrusion. |
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bristle 1 |
= arista, awn, seta |
STRUCTURE |
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A slender, more or less straight and stiff, fine-pointed, terminal or subterminal appendage or prolongation, sometimes a continuation of the bearing structure's central primary vein, as on a glume, lemma, or palea in Poaceae (Gramineae). |
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nucellus pl. nucelli |
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STRUCTURE |
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The distinct, genetically diploid tissue layer immediately surrounding the embryo sac of an ovule; often considered equivalent to a megasporangium wall. |
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blade |
= lamina |
STRUCTURE |
|
The expanded, more or less planate, distal portion, when present, of a leaf, leaflet or bract. |
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neck (archegonial) |
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STRUCTURE |
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The distal narrowed portion of an archegonium above its bulbous base. |
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dyad |
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STRUCTURE |
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A pair of coherent pollen grains shed as a unit. |
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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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knee 2 |
|
STRUCTURE |
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An emergent portion of an otherwise normally submerged secondary root of a wetland tree, resembling a bent human knee. |
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perianth tube |
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STRUCTURE |
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A relatively narrow, fully connate portion of a syntepalous (gamotepalous) perianth proximal to a broader portion (limb) that comprises the distinct or connate distal portions of the tepals. |
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prop root |
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STRUCTURE |
|
A relatively stout adventitious root arising from the lower portion of a main stem and extending outward and downward toward the substrate, within which it ultimately becomes anchored, thus buttressing the aboveground portion of the plant. |
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rhizoid |
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STRUCTURE |
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Any structure that is similar to a root in appearance and function but that is not a true root ontogenetically and anatomically, especially one produced from a gametophyte thallus. |
