Baccacetum or Etaerio.   An aggregation of berries, as in Actaea


Baccate.   Juicy and very succulent


Balausta.   Many-seeded, many- loculed indehiscent fruit with a tough, leathery pericarp, as in Punica


Banded.   Transverse stripes of one color crossing another


Barbed.   With short, rigid reflexed bristles or processes


Barbellate.   Minutely barbed


Bark.   Tissues of plant outside wood or xylem


Basal or Radical.   At the bottom or base of a structure


Base.   bottom or lower portion


Basicaulous.   With basal branches


Basicaulous.   Near base of stem


Basicidal Capsule.   One that dehisces through basal slits or fissures, as in some species of Aristolochia


Basifixed.   Anther attached at its base to apex of filament


Basipetal.   Developing downward, toward base


Basipetiolar.   At the base of the petiole


Basiramous.   Leaves on lower part of branch


Basiscopic.   Facing basally


Bast bundles (peripheral strands).   bundles of thick-walled cells parallel to the midrib, as in Isoetes


beard.   A tuft, line or zone of trichomes


Bearded or Barbate.   With long trichomes usually in a tuft, line or zone


Bent.   Foliate embryo with expanded and usually thick cotyledons in an axile position bent upon the hypocotyl in a jacknife position


Berry.   Fleshy fruit, with succulent pericarp, as in Vitis


Bibacca.   A fused double berry, as in Lonicera


Bicarpellate.   Two-carpelled


Bicrenate or Doubly-crenate.   With smaller rounded teeth on larger rounded teeth


Bidentate.   Two-toothed


Biduous.   Lasting two days


Biennial.   Living two years, usually flowering second year


Biferous.   Appearing twice yearly


Bifid.   Cut or divided into two lobes or parts


Biflorous.   Flowering in autumn as well as in spring


Bifoliolate, Geminate, or Jugate.   With two leaflets from a common point


Bifurcate.   Divided into two forks or branches


Bigeminate, Bijugate.   With two orders of leaflets, each bifoliolate; doubly paired


Bilabiate.   Two-lipped, with two unequal divisions


Bilocular.   Two-locular


Bimestrial.   Periodicity: occurring every two months; duration: lasting two months


Binate.   Twinned


Bipalmate.   Twice palmate


Bipinnate.   Twice pinnate


Biseriate.   Two-rowed; in two series


Biserrate or Doubly-serrate.   With sharply cut teeth on the margins of larger sharply cut teeth


Bisexual.   Both sexes in same flower (monoclinous, perfect)


Biternate.   With two orders of leaflets, each ternately compound


Blade.   The expanded portion of a leaf


Blastocarpous.   Germination of seeds while within the pericarp, as in Rhizophora


Blotched.   The color disposed in broad, irregular blotches


Bordered.   One color is surrounded by an edging of another


Botuliform.   Sausage-shaped


Bract.   Modified, usually reduced, leaf in the inflorescence


Bracteal and Laminar.   May be localized or found over entire structure


Bracteole or Bractlet.   A secondary or smaller bract


Bristle.   A stiff, strong trichome, as in the perianth of some members of the Cyperaceae


Bristly.   Beset with bristles


Brochidodromous.   With a single primary vein, the secondary veins not terminating at the margin but joined together in a series of prominent upward arches or marginal loops on each side of the primary vein


Bud.   Immature vegetative or floral shoot or both, often covered by scales. Bud Primordium - Meristematic tissue that gives rise to a lateral bud


Bulb.   A short, erect, underground stem surrounded by fleshy leaves


Bulbel.   A small bulb produced from the base of a larger bulb


Bulbil.   A small bulb or bulb-like body produced on above ground parts


Bulblet.   A small bulb, irrespective of origin; a small, bud-like vegetative propagule produced on the leaves of some ferns


Bullate.   Puckered or blistered


Bur (Involucre).   Cypsela enclosed in dry involucre, as in Xanthium


Buttress.   Roots with board-like or plank-like growth on upper side, presumably a supporting structure