Glossary
Glossary
Glossary
There are currently 60 names in this directory beginning with the letter P.
Palmate
Lobed, veined or divided from a common point, like the fingers of a hand, with the sinuses between the lobes pointing to the umbo
Palmate-Pinnate Venation
When the primary leaf veins diverging from the umbo have secondary veins arranged along each primary, paired oppositely like a feather
Palmately
Compound Leaf composed of many leaflets connected from a common point, in a palm-like manner
Parietal Placentation
Ovules that are borne on the inner sides of the ovary wall or on outgrowths of that wall
Parted Leaf
A leaf with Incisions or sinuses that cut to the inner third of the distance from the perimeter to the umbo, but not quite to the mid-vein or the petiole Ex. B. crassicaulis, B. mananjenbensis
Peduncle, Pedunculate
Main flower stalk supporting either a cluster or a solitary flower (compare pedicel)
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Peltate
A leaf with a petiole attached to the lower surface of the blade (leaf) rather than the margin, or at the base of the leaf, which would be basifixed. Outline of the leaf shape is immaterial. View Illustration
Perianth
The collective term for both the petals and the sepals; in Begonia these two organs may look similar
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Petal
One of the separate parts of the corolla (a group of petals); usually attractively colored or white
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Petiole
Leaf stalk that provides support between the main stem and the blade (leaf), is usually wider where it joins the stem to provide strength at that point and has additional strengthening structures along its length to help support the blade
Petiole Apex
Top end of the petiole or leaf stalk, where the petiole attaches to the blade, that is, at the umbo
Phenology
The study of cyclical and seasonal natural phenomena, especially as it relates to climate and plant and animal life
Picotee
A flower that has petals that are characterized by having a dark color only on the edge of the petals, the petals are slightly serrated or fringed at the edge, as in many tuberous, Begonia flowers
Pinnate
Resembling a feather, having parts or branches arranged on each side of a common axis, a compound leaf having leaflets growing opposite each other in pairs on either side of the rachis or prolongation of the petiole
Pinnate Venation
With one somewhat central midrib having secondary veins paired oppositely arranged along it, like a feather
Pinnatifid
Leaves with pinnate lobes that are not discrete and remain sufficiently connected to each other that they are not separate leaflets
Pinnatisect
A leaf shape where the lobes or clefts are nearly to the midrib in narrow divisions but do not form separate leaflets
Pistil
The stigma, style, and ovary of a female flower; the female reproductive organs. The ovary supports a long style topped by a stigma, the part of the pistil that receives and germinates the pollen from the male flower, and the ovary, the enlarged basal portion of the pistil, is where the ovules or seed are produced
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Placenta
The portion of the female flower’s ovary bearing the ovules (immature seeds). Plural is placentae
Placentation, axile with bifid placentae
Ovules attached to the central axis or partitions of the ovary but each placenta is deeply divided into two
Placentation, axile, with entire placentae
Ovules or seeds, attached to the central partitions of the ovary that has multiple locules or compartments with the placenta not lobed
Placentation, parietal with branched placentae
Ovules are borne on the ovary wall or on outgrowths of the wall
Propagule
A seed, spore, or vegetative portion of a plant, such as an offshoot, that may produce a new plant
Protendrous
In monoecious plants, the maturing of anthers (on staminate flowers reach anthesis and shed pollen), before the stigma on pistillate flowers reach maturity
Protogynous
In monoecious plants, when the pistillate flowers are receptive to pollen before the pollen is shed from the staminate flowers
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