bractlet 2 |
= bracteole, prophyll(um); < bract |
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A second- or higher-order bract within, and subtending some portion of, an aggregate branching structure, especially when subtending a flower. |
segment |
? division, lobe |
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Any generally convex, major peripheral protrusion or component sector that is delimited by concavities in the surface or margin and that is not proximally distinct from the remainder of the whole. |
gynoecium pl. gynoecia var. gynaecium |
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The pistil(s) of a single flower together with any ontogenetically equivalent or subordinate structures present, taken collectively; the total female (ovule-producing) structural complement of a single flower. It may include one to many pistils, each simple or compound. |
stylopodium pl. stylopodia |
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A discoid enlargement at the base of the styles; esp. in Apiaceae (Umbelliferae). |
stipule |
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Any distinct, relatively diminutive, more or less foliaceous structure inserted on a stem alongside a petiole, or on a petiole near its base, and ontogenetically closely associated with the leaf; usually occurring as one of a pair disposed one to either side of the petiole. |
husk |
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A more or less dry, hard or fibrous, simple or compound enclosure or outer layer of a seed, fruit or inflorescence. |
sheath (leaf) |
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The lower (basal or proximal), fundamentally laminar but strongly involute portion of one of the non-petiolate leaves characteristic of most monocotyledons (Liliidae); distinct from the leaf blade, which, when present, is borne distally upon it; analogous, though not necessarily homologous, with a petiole; usually more or less completely enclosing a portion of the stem above the node from which the leaf is borne. |
collar 1 |
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The free portion (if any) of a floral tube, distal to its casing and/or neck when one or both is/are present. |
bursicle |
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A pouch- or flap-like protrusion from the stigma that encloses the caudicle of a pollinium. |
tuberoid (root-stem) |
= dropper |
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An axial outgrowth that descends from a bulb and eventually forms a new bulb; esp. in Orchidaceae. |
embryotega pl. embryotegae, embryotegas |
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A small, hardened, lid-like portion of the testa (seed coat) at the micropyle of some seeds, detaching at germination. |
nectary |
< gland |
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A multicellular, anatomically distinct structure that produces and exudes nectar. |
pseudostem |
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A structure that resembles a stem but is not part of the axial system of a shoot, lacking anatomical differentiation into nodes and internodes. |
basal cell |
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Any of the ring of cells forming the lowermost (proximal) portion of an antheridial wall. |
connective |
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The tissue between and joining the laterally opposed thecae of an anther, connecting them with the distal end of the staminal filament when the latter is present. |
dissepiment |
< septum; > replum |
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A wall or partition between adjacent locules of an ovary or fruit. |
wall (fruit, ovary, pollen, spore) |
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The exterior layer of tissue(s) enclosing anatomically distinct interior tissues and sometimes fluid and/or one or more cavities. |
chaff 1 |
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Collectively, the paleae (pales, palets) sometimes borne on the receptacle of a capitulum (head) in Asteraceae (Compositae). |
squamella 1 pl. squamellae |
= squamule; < scale, trichome |
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A diminutive squama (lepis). |
staminode |
= staminodium |
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Any sterile structure deemed to represent a modified stamen, homology being inferred on the basis of structural similarity, ontogeny, and/or position; sometimes petaloid, sometimes nectariferous, sometimes connate with others or adnate to other floral structures. |
areola 1 pl. areolae |
= areole |
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Any distinctive surficial discontinuity of generally circular outline, whether concave, flush, or convex; when protuberant, sometimes bearing trichomes or spines, as in some Cactaceae. This term is used only when such entities are deemed structurally distinctive enough to merit description in their own rights, rather than as aspects of the surface. |
sepal |
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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. |
cladophyll |
= cladode, phylloclade |
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A stem segment that functions as a leaf; often more or less compressed. |
needle |
< leaf, macrophyll (not recommended), megaphyll |
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A relatively stiff, compressed-acerose leaf; in Pinophyta. |
perigynium 1 pl. perigynia |
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Two whorls of bracts, scales or setae immediately subtending the ovary, sometimes cupulate (cup-shaped) or ampulliform (flask-shaped, lageniform) and investing the fruit (achene); in Cyperaceae. |