Glossary

Glossary

Glossary

All | # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | Submit a name
There are currently 60 names in this directory beginning with the letter P.
Paleae
Vestite small, weak, erect membranous scales, chaff

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 Blade Venation
Three or more primary veins diverging from the umbo on a leaf

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

Palmatifid
The blade is lobed or divided for halfway down or more

Palmatisect
The various elements of the blade are free almost down to the base

Papillose
Pimpled, covered with minute tubercles or excrescences of uneven size, and rather soft.

Papyraceous
Papery, having the consistency of writing paper and quite opaque

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

Pectinate
Divided into very numerous segments, close and narrow, like the teeth of a comb

Pedate
Split into three main divisions with two outer divisions forked into two smaller ones

Pedicel
Stalk supporting each single flower in a cluster (compare peduncle) View Illustration

Pedicellate
Flowers having short floral stalks called pedicels

Peduncle, Pedunculate
Main flower stalk supporting either a cluster or a solitary flower (compare pedicel) View Illustration

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

Pendent, Pendulous
Hanging downward, drooping

Penninerved
Feather-like veining

Perennial
A plant grown from seed and reproducing, lives for two or more years

Perianth
The collective term for both the petals and the sepals; in Begonia these two organs may look similar View Illustration

Perianth Segments
Used rather than tepal, to mean segments of both the calyx and the corolla

Perpendicular
Regarding plant habit, at a right angle to the stem

Persistence
Regarding stipules, how long the stipule remains attached to the stem

Persistent
Regarding stipule persistence, neither withers or falls off after the leaf matures

Petal
One of the separate parts of the corolla (a group of petals); usually attractively colored or white View Illustration

Petaloid
Petal-like in color and shape, resembling a petal

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

Petiole Indument
A covering, especially of hairs on the leaf stem

Petiolulate
Having a petiolule

Petiolule
The stalk of a leaflet in a compound leaf

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

Pilose
Covered with long, soft, straight hairs, scattered not dense

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 View Illustration

Pistillate
Bearing a pistil or pistils, but lacking stamens; female flowers

Placenta
The portion of the female flower’s ovary bearing the ovules (immature seeds). Plural is placentae

Placentae, entire form
Each individual placenta is not divided

Placentation
The arrangement or configuration of the placentae such as axile, entire and parietal

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

Plicate
Folded into pleats or furrows, usually lengthwise

Polymorphic
Having various forms

Procumbent
Growing flat on the soil or ground

Propagule
A seed, spore, or vegetative portion of a plant, such as an offshoot, that may produce a new plant

Prostrate
Laying flat

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

Pseudodichotomous
Resembling but not exactly dividing into two equal parts or branches

Puberulous
Densely covered with very short fine hair barely visible to the naked eye

Pubescent
Covered with soft short hairs; a general term of hairiness

Puncticulate
Marked with dots, depressions, or translucent glands

Purpurascent
Purple or becoming purple

Pustulate
Where surface has numerous uniform acute elevations, like pimples e.g., B. ‘Emerald Jewel’, or Foveolate where the surface is pitted with shallow distinct depressions e.g., B. ‘Tom Ment’


Submit a name