|
pinna pl. pinnae |
< leaflet |
STRUCTURE |
|
One of the first-order divisions or leaflets of a pinnate frond; in Polypodiophyta. See also pinnule. |
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pinnate |
> pinnatifid, pinnatisect |
architecture |
foliaceous structure |
Compound with one order of leaflets inserted at different points along and to either side of the axis, from which those on each side diverge more or less in parallel; or lobed (cleft, divided, parted, segmented), incised or ribbed in a similar, feather-like pattern. Unless qualified to indicate otherwise, this term usually is understood to mean "pinnately once-compound." See also imparipinnate, palmatipinnate, paripinnate, …pinnate, pinnatifid. |
|
…pinnate |
|
architecture |
foliaceous structure |
Compound with the number of orders of leaflets indicated by the prefix, each order pinnate; as in bipinnate, tripinnate. |
|
pinnatifid |
> pinnatisect; < pinnate |
plane shape |
|
Pinnately divided. |
|
pinnatifid |
> pinnatisect; < pinnate |
solid shape |
|
Pinnately divided. |
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pinnatisect |
< pinnate, pinnatifid |
plane shape |
|
Pinnately divided with the sinuses extending to the central axis. |
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pinnatisect |
< pinnate, pinnatifid |
solid shape |
|
Pinnately divided with the sinuses extending to the central axis. |
|
pinnule |
< leaflet |
STRUCTURE |
|
A second- or higher-order division or leaflet of a pinnate frond; a division of a pinna; in Polypodiophyta. |
|
pistil |
> carpel |
STRUCTURE |
|
Any simple or compound, discrete or histologically distinct, female (ovule-producing) floral structure, or any putatively homologous sterile structure; comprising an ovary and one or more stigmas borne either directly upon the ovary or upon one or more intervening styles. See also gynoecium. |
|
…pistillate |
= …gynous, …pistilled |
architecture |
flower, gynoecium |
Having the number of pistils indicated by the prefix; as in tripistillate. |
|
pistillate |
= carpellate (not recommended) |
architecture |
inflorescence, flower, floret |
Having functional pistils but no functional stamens, thus unisexual and female. |
|
…pistilled |
= …gynous, …pistillate |
architecture |
flower, gynoecium |
Having the number of pistils indicated by the prefix; as in three-pistilled. |
|
pistillode |
= pistillodium |
STRUCTURE |
|
Any sterile structure deemed to represent a modified pistil, homology being inferred on the basis of structural similarity, ontogeny, and/or position; sometimes nectariferous, sometimes connate with others or adnate to other floral structures. |
|
pistillodium pl. pistillodia |
= pistillode |
STRUCTURE |
|
Any sterile structure deemed to represent a modified pistil, homology being inferred on the basis of structural similarity, ontogeny, and/or position; sometimes nectariferous, sometimes connate with others or adnate to other floral structures. |
|
pit |
= fovea, scrobis |
FEATURE |
|
A small, rounded depression. |
|
pitcher |
= ascidium, pitcher blade |
STRUCTURE |
|
A pitcher-shaped (ascidiform) leaf blade, sometimes lidded (operculate), usually carnivorous; esp. in Nepenthaceae, Sarraceniaceae. |
|
pitcher-blade |
= ascidium, pitcher |
STRUCTURE |
|
A pitcher-shaped (ascidiform) leaf blade, sometimes lidded (operculate), usually carnivorous; esp. in Nepenthaceae, Sarraceniaceae. |
|
pitcher-bladed |
= ascidiate |
architecture |
leaf |
Having a pitcher-shaped (ascidiform) blade; esp. in Nepenthaceae, Sarraceniaceae. |
|
pitcher-leaved |
= ascidiate |
architecture |
plant |
Bearing pitcher-bladed (ascidiate) leaves; esp. in Nepenthaceae, Sarraceniaceae. |
|
pitcher-shaped |
= ascidiform |
solid shape |
|
Having a more or less tubular, radially or bilaterally symmetrical body closed at the base and broadening toward a more or less open apex sometimes lidded or overarched by a prolongation of one side; like a pitcher. |
|
pith |
|
STRUCTURE |
|
The central ground tissue of a stem or, when present, of a root, consisting of thin-walled parenchyma cells; distinct and more or less soft and spongy relative to the other tissues of the axis; sometimes partly or wholly degenerating after secondary growth has begun. |
|
pithy |
= medullose |
texture |
|
Loose or spongy internally, denser and firmer externally. |
|
pitted |
= foveate |
relief |
|
Having numerous, small, rounded depressions. See also fine-pitted (foveolate, scrobiculate). |
|
placenta pl. placentae, placentas |
|
STRUCTURE |
|
An ovule-bearing zone of the tissue surface bordering an ovary locule; of merely topographic, not histological, significance; may be a part of the ovary wall proper or an extension from it, or a part of the central axis of the ovary or an extension from it. |
|
placenta-shaped |
= placentiform |
solid shape |
|
Thickly discoid (disciform); like the generalized form of a human placenta. |
