Glossary
Glossary
Glossary
There are currently 45 names in this directory beginning with the letter B.
Basal
Positioned at or arising from the base of any thing, as leaves arising from the base of the stem
Basal Lobes Overlapped
Of a blade base where no sinus is visible as one of the two lobes at the base sits over the other Ex. B. acetosa
Basal Lobes Spiraled
A leaf base with lobes that curl around to form a spiral. Can be double spiraled or spiraled on one side only. Can be further described as double or single spiraled Ex. B. rex
Base
Lowest point of attachment of any plant part; in a leaf, the lower approximately 25% of the lamina
Begonia
Genus of the family Begoniaceae, perennial, flowering plants that grow in tropical and subtropical areas
Biacute
Having two tips where each is tapering to a point with essentially straight or only slightly convex sides
Bipinnate
Compound-leaved with leaflets on both sides of the petiole (like a feather) which is pinnate
Blade
The lamina or flattened, broad part of a leaf, excluding the stalk or petiole; may apply to a petal, or sepal.
View Illustration
Blade Surface
Variations in the lamina or leaf blade outer layer can be described by the terms: Rugose or covered with reticulated (network of) veins, spaces between are convex (wrinkled), and the elevations irregular, e.g., B. goegoensis, B. rajah, or Bullate where the surface is irregularly puckered or blistered e.g., B. crispula, or Muricate where surface is with a uniform low obtuse elevation e.g., B. ‘Black Raspberry’, or 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’
Blade Texture
The surface of leaves categorized primarily by the blade relative thickness, Membranous is thin or semi-transparent, Chartaceous is paper thin and opaque, Coriaceous is medium thick, but with the appearance and flexibility of soft leather, Fleshy is a thick, firm, juicy, often brittle (breaking when bent to 90 degrees), and Scarious is shriveled, thin and dry, as in old dried out stipules
Bract
A much reduced leaf-like structure just below the base of a flower cluster stem (peduncle). Bracts protect developing flower buds
Bracteole
A small bract appearing either singly or in pairs, a short distance down the pedicel or calyx
Broadly crescent form
Broad and with the shape of the moon in its first or last quarter when it appears to have one concave edge and one convex edge
Broadly cuneate
Wedge shaped, narrowly triangular with narrow end at point of attachment, and a 6 to 5 length to width ratio
Broadly Ovate
A leaf shape that is a flattened oval, oblong or elliptical shape, broadest at the lower end with a 6 to 5 length to width ratio
Bulbils
A miniature bulb produced in leaf axils of a plant. Propagules, in which leaflike organs act as storage organs
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