Glossary

Glossary

Glossary

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There are currently 68 names in this directory beginning with the letter S.
Sagittate
Leaf that is triangular, arrowhead shaped, with its basal lobes pointing downward, unlike hastate

Sarmentose
Producing long flexible runners or stolons

Scabrous
Covered with scattered short, rigid or harsh hairs that are not erect, often not visible without magnification but evident to touch

Scale
Vestite flattened plate-like elements

Scandent
Climbing; vine-like

Scape
Flower stalk that arises directly from the soil

Scarious
Regarding texture, shriveled, thin, membranous, and dry

Section (sectio)
1. A taxonomic category intermediate in rank between subgenus and species. The subgenus, if present, is higher than the section, and the rank of series, if present, is below the section. Sections can be further divided into subsections. 2. The cutting a piece of plant tissue in order to see its internal structure

Secund
Arranged on, or turned to one side of an axis

Seed
A ripened, fertile ovule made up of a protective coat enclosing an embryo and food reserves. In begonias, these are tiny golden barrels ranging in size from .25 to .75mm long. Typically, Begonia species produce between 100-600 seeds per seed capsule

Seedling
Plant raised from a seed

Semi-inferior
On an ovary, where the lower part is inferior, but the upper part is free and projects over the perianth. This is rare in the plant kingdom but only found in the Begonia relative Hillebrandia sandwicensis

Semi-tuberous
Caudex forming

Semperflorens
A type of Begonia that is probably the most widely grown, in some parts of the country are called “wax type” because of the waxy look to their leaves, grown mostly as bedding plants and treated as annuals, but are really a perennial shrub type in areas that do not freeze

Sepal
One segment of the calyx; usually green in most plants, found just below or under the petals, but in begonias it is usually attractively colored or white and can be indistinguishable from the petals themselves View Illustration

Septum, Septa
A wall dividing a cavity or structure into smaller ones

Sericeous
Silky, satin-like sheen; long fine appressed hairs

Serrate
A leaf margin with sharp saw-like teeth that point forward or slant towards the apex or tip of the leaf

Serrate double
Where each saw-toothed element on a margin, itself has a saw-tooth

Serrulate
A leaf margin with a minutely serrated edge, similar to serrate, but the teeth are smaller

Sessile
A leaf with base attached directly to the stem or peduncle without a petiole or pedicel; stalkless

Setaceous
Having bristles, bristle-like

Setose
Covered with bristles, similar to hispid but less dense

Setulose
Minutely setose

Shape
The geometric outline of a Begonia leaf

Shoot
A young growing branch or stem

Short Acuminate Apex
A leaf apex that starts out straight or convex then changes to concave and gradually comes to a point and the angle it makes is greater than 90 degrees. If the angle is less than 60 degrees that it is a long acuminate apex

Shrub
Begonias characterized by growing upright on branching stems, some have hairy, velvet-like leaf surfaces while others are distinguished by leaf coloring never seen anywhere else. Ex. B. ‘Brevirimosa’, B. venosa, B. lyallii f. Masoalensis, B. polliloensis

Shrub-like
A woody plant that produces stems or shoots from the base

Simple
Having or being composed of only one thing; scarcely divided or branched at all; an elementary shape

Simple Dichasium
A determinate inflorescence with a simple cluster of three flowers arising from a common peduncle by dichotomous branching

Simple leaf
Leaf with one blade per petiole Ex. Peltate: B. ferramica, B. letouzeyi, Basifixed: B. dioica, B. multistaminea

Sinuate
A leaf margin that has a strongly wavy or uneven edge that turns inwards and outwards but is not lobed

Sinus
The cleft, depression, space, or recess between two lobes or deep incisions of a leaf or petal View Illustration

Sparse
Occurring or growing at widely spaced intervals; not thick or dense

Spatulate
Like a spatula in shape, with a rounded blade gradually tapering to the base

Species
Subdivision of a genus of a plant family (species is both the singular and plural)

Spiral
Winding in a continuous and gradually widening (or tightening) curve, either around a central point on a flat plane or about an axis so as to form a cone

Squamiform
Having the shape of scales, scaly; a scale

Squarrose
Rough or scruffy

Stamen
The male reproductive organ of a flower that produces pollen and consists of an anther and filament View Illustration

Staminate
Bearing stamens but not pistils, a male flower which does not produce fruit or seeds

Stellate
Forked or Multiple-branched hairs, each on a short central stalk or sessile; star like

Stem
A stalk bearing nodes, supports leaves, buds, flowers, or fruit, and is usually found above ground

Stem Attachment
How the petiole and stem connect to the blade (leaf), can be straight, oblique or transverse

Sterile
Lacking functional sex organs or infertile

Stigma
In the female flower, the top part of the pistil that receives the pollen from the male flower and germinates the pollen prior to fertilization ovule production by the ovary View Illustration

Stipule
One of a pair of leaf-like appendages found at the base of the petiole. In begonias, they protect a new leaf bud until they split and the new leaf unfolds with its stem (petiole). Caducous fall off early after leaf emerges, Persistent hang on for a while, Marcescent ones dry up but stay in place

Stolon
A shoot that bends to, or runs along either above or below the ground and takes root giving rise to a new plant at the nodes or tip

Stoloniferous
A plant that sends out stolons

Stomata
Pores in the leaf formed by two guard cells

Straight Leaf Position
The blade position relative to the petiole where the midrib or midnerve of the blade continues in a straight line with the petiole, Ex. B. cucullata

Strigose
Having harsh, stiff, straight, short hairs, bristle-like in harshness

Style
The slender stalk of a pistil connecting the stigma to the ovary View Illustration

Sub
Prefix meaning almost or nearly

Subentire
Having very slight marginal incisions or indentations, almost entire

Subspecies
A taxonomic category within species, where there may be a few morphological or genetic distinctions within the same species and a big difference in their geographic distribution. Its taxonomic rank is between species and variety

Substrate
The material on which a plant lives, the soil or rock or sphagnum moss

Subulate
Awl-shaped; tapering to a point

Succulent
Juicy; fleshy; soft and thickened

Suffricticose
Somewhat woody

Suffrutescent stems
Stems that are woody at the base that survive from year to year, with herbaceous distal portions

Sulcate
With longitudinal grooves

Suprabasal
Above the base

Supraterraneus
Above ground; above the soil

Symmetric; symmetry
Divided into similarly identical or mirror-image parts; near repetition of the pattern element either by reflection or rotation

Sympodial
Type of branching pattern where one branch develops more strongly than the other, resulting in the stronger branches forming the primary shoot and the weaker branches appearing laterally

Synonym
Alternate or previous name


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