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One of its component simple fruits (drupe) in section, showing the pulp, stone, and contained seed.

Blackberry

One of its component simple fruits (drupe) in section, showing the pulp, stone, and contained seed.

"Staphylea Bumalda. 1. a flower; 2. a perpendicular section of it; 3. a section of its ovary." -Lindley, 1853

Japanese Bladdernut

"Staphylea Bumalda. 1. a flower; 2. a perpendicular section of it; 3. a section of its ovary." -Lindley,…

"Vaccinium amoenum. 1. a flower; 2. a perpendicular section of it without the corolla; 3. a cross section of an ovary; 4. an anther; 5. half a seed." -Lindley, 1853

Large-Cluster Blueberry

"Vaccinium amoenum. 1. a flower; 2. a perpendicular section of it without the corolla; 3. a cross section…

The flowers of Bolax glebaria, a flowering plant in the Apiaceae family.

Bolax

The flowers of Bolax glebaria, a flowering plant in the Apiaceae family.

"Boldoa fragrans. 1. a section of the ripe fruit; 2. the embryo shown separately." -Lindley, 1853

Boldo

"Boldoa fragrans. 1. a section of the ripe fruit; 2. the embryo shown separately." -Lindley, 1853

Stage of a species of Botrydium, a globose cell.

Botrydium

Stage of a species of Botrydium, a globose cell.

Full-grown plant, extended and ramified below in a root-like way.

Botrydium

Full-grown plant, extended and ramified below in a root-like way.

A species of Botrytis.

Botrytis

A species of Botrytis.

"Bragantia Blumei. 1. a section of its wood; 2. one of its flowers; 3. a seed; 4. the same divided perpendicularly; 5. anthers and stigma of Asarum." -Lindley, 1853

Bragantia

"Bragantia Blumei. 1. a section of its wood; 2. one of its flowers; 3. a seed; 4. the same divided perpendicularly;…

A branch from a black mulberry with fruits and leaves. The plant have both male and female flowers are used for reproduction by pollination.

Black Mulberry Branch with Fruits and Leaves

A branch from a black mulberry with fruits and leaves. The plant have both male and female flowers are…

A stout plant with grey scales. The fronds range between 1 and 2 feet, and approximately 1 foot in width. They are commonly found in Brazil.

Polypodium Brasiliense

A stout plant with grey scales. The fronds range between 1 and 2 feet, and approximately 1 foot in width.…

"Interior of a Brazilian forest on the Organ Mountains." -Lindley, 1853

Brazilian Forest

"Interior of a Brazilian forest on the Organ Mountains." -Lindley, 1853

"1. fruit of Brexia madagascariensis; 2. a cross section of it; 3. a seed; 4. the same divided perpendicularly." -Lindley, 1853

Brexia

"1. fruit of Brexia madagascariensis; 2. a cross section of it; 3. a seed; 4. the same divided perpendicularly."…

"Francoa appendiculata. 1. stamens and pistil; 2. cross section of the ovary; 3. perpendicular section of the seed." -Lindley, 1853

Bridal Wreath

"Francoa appendiculata. 1. stamens and pistil; 2. cross section of the ovary; 3. perpendicular section…

"Anoplanthus uniflorus. 1. a flower cut open; 2. a section of the ovary; 3. a seed; 4. the section of it to show the embryo." -Lindley, 1853

Naked Broomrape

"Anoplanthus uniflorus. 1. a flower cut open; 2. a section of the ovary; 3. a seed; 4. the section of…

Bryonia dioica or Red Bryony is a species of perennial climbing herbs.

Red Bryony

Bryonia dioica or Red Bryony is a species of perennial climbing herbs.

Riccia. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section. The cells which will produce the sporogenous tissue are shaded.

Bryophyta

Riccia. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section. The cells…

Marchantia morpha. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section. The cells which will produce the sporogenous tissue are shaded.

Bryophyta

Marchantia morpha. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section.…

Pellia epiphylla. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section. The cells which will produce the sporogenous tissue are shaded.

Bryophyta

Pellia epiphylla. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section.…

Anthoceros laevis. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section. The cells which will produce the sporogenous tissue are shaded.

Bryophyta

Anthoceros laevis. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section.…

Cephalozia bicuspidata. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section. The cells which will produce the sporogenous tissue are shaded.

Bryophyta

Cephalozia bicuspidata. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section.…

Radula complanaia. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section. The cells which will produce the sporogenous tissue are shaded.

Bryophyta

Radula complanaia. Semi-diagrammatic figure of a young embryo of Liverworts in longitudinal section.…

Marchantia polymorpha. Portion of thallus bearing two stalked antheridiophores

Bryophyta

Marchantia polymorpha. Portion of thallus bearing two stalked antheridiophores

Marchantia polymorpha. Longitudinal section through a young antheridiophore. The antheridia are seated in depressions of the upper surface.

Bryophyta

Marchantia polymorpha. Longitudinal section through a young antheridiophore. The antheridia are seated…

Marchantia polymorpha. Longitudinal section of antheridium

Bryophyta

Marchantia polymorpha. Longitudinal section of antheridium

Marchantia polymorpha. Stoma in surface view

Bryophyta

Marchantia polymorpha. Stoma in surface view

Marchantia polymorpha. Air-chamber with the filaments of assimilating cells and stoma in vertical section

Bryophyta

Marchantia polymorpha. Air-chamber with the filaments of assimilating cells and stoma in vertical section

Blasia pusilla. The margin of the thallus bears leaf-like lobes

Bryophyta

Blasia pusilla. The margin of the thallus bears leaf-like lobes

Chiloscyphus polyanthos. The perianth with the small perichaetial leaves below it.

Bryophyta

Chiloscyphus polyanthos. The perianth with the small perichaetial leaves below it.

Cephalozia bicuspidata. Longitudinal section of the summit of a shoot bearing a nearly mature sporogonium, sg, still enclosed in the calyptra; ar, archegonia which have remained unfertilized

Bryophyta

Cephalozia bicuspidata. Longitudinal section of the summit of a shoot bearing a nearly mature sporogonium,…

Anthoceros laevis

Bryophyta

Anthoceros laevis

Funaria hygrometrica. Leafy shoot bearing a young sporogonium enclosed in the calyptra

Bryophyta

Funaria hygrometrica. Leafy shoot bearing a young sporogonium enclosed in the calyptra

Funaria hygrometrica. Leafy plant with an almost mature sporogonium

Bryophyta

Funaria hygrometrica. Leafy plant with an almost mature sporogonium

Funaria hygrometrica. Median longitudinal section of a capsule, with the seta gradually widening into the apophysis at its base

Bryophyta

Funaria hygrometrica. Median longitudinal section of a capsule, with the seta gradually widening into…

Funaria hygrometrica. Germinating spores.

Bryophyta

Funaria hygrometrica. Germinating spores.

Funaria hygrometrica. Part of a developed protonema. h, Creeping filament with brown walls from which the filaments of chlorophyll-containing cells

Bryophyta

Funaria hygrometrica. Part of a developed protonema. h, Creeping filament with brown walls from which…

Sphagnum acutifolium. Longitudinal section of apex of a bud bearing archegonia (ar), enclosed by the large leaves (y); ch, small perichaetial leaves

Bryophyta

Sphagnum acutifolium. Longitudinal section of apex of a bud bearing archegonia (ar), enclosed by the…

Sphagnum acutifolium. Longitudinal section of the sporognium borne on the pseudopodium (ps); c, calyptra; ar, neck of archegonium; sg, foot; sg, capsule.

Bryophyta

Sphagnum acutifolium. Longitudinal section of the sporognium borne on the pseudopodium (ps); c, calyptra;…

Sphagnum acutifolium. Ripe sporogonium raised on the pseudopodium above the enclosing leaves

Bryophyta

Sphagnum acutifolium. Ripe sporogonium raised on the pseudopodium above the enclosing leaves

Andreaea pelrophila, plant bearing opened capsule

Bryophyta

Andreaea pelrophila, plant bearing opened capsule

Funaria hygrometrica. Longitudinal section through the summit of a male branch

Bryophyta

Funaria hygrometrica. Longitudinal section through the summit of a male branch

Funaria hygrometrica. Longitudinal section of the very young sporogonium enclosed in the archegonial wall.

Bryophyta

Funaria hygrometrica. Longitudinal section of the very young sporogonium enclosed in the archegonial…

Funaria hygrometrica. Further stages of the development of the sporogonium enclosed in the calyptra formed from the archegonial wall and still bearing the neck. The foot of the sporogonium has penetrated into the underlying tissue of the stem of the moss-plant

Bryophyta

Funaria hygrometrica. Further stages of the development of the sporogonium enclosed in the calyptra…

Funaria hygrometrica. Further stages of the development of the sporogonium enclosed in the calyptra formed from the archegonial wall and still bearing the neck. The foot of the sporogonium has penetrated into the underlying tissue of the stem of the moss-plant

Bryophyta

Funaria hygrometrica. Further stages of the development of the sporogonium enclosed in the calyptra…

Bryopsis plumosa; apex of a stem with its branchlets; all the extension of one cell.

Bryopsis Plumosa

Bryopsis plumosa; apex of a stem with its branchlets; all the extension of one cell.

Also known as Rhamnus cathartica. It is a deciduous shrub with grey-brown bark and spiny branches. The leaves are ovate and acutely serrated. The height of this plant reaches between 5 feet and 10 feet.

Buckthorn

Also known as Rhamnus cathartica. It is a deciduous shrub with grey-brown bark and spiny branches. The…

Orthotropous ovule of Buckwheat: <em>c</em>, hilum and chalaza; <em>f</em>, orifice.

Buckwheat

Orthotropous ovule of Buckwheat: c, hilum and chalaza; f, orifice.

A Florida plant, the buckwheat tree: "Mylocaryum ligustrinum. 1. a flower; 2. stamens; 3. ovary; 4. section of seed." -Lindley, 1853

Buckwheat Tree

A Florida plant, the buckwheat tree: "Mylocaryum ligustrinum. 1. a flower; 2. stamens; 3. ovary; 4.…

"Blancoa canescens. 1. a flower and ovary of Conostyles aemula opened." -Lindley, 1853

Red Bugle

"Blancoa canescens. 1. a flower and ovary of Conostyles aemula opened." -Lindley, 1853

"Scirpus lacustris. 1. A flower surrounded with hypogynous bristles; 2. a seed; 3, a section of it, showing the lenticular embryo." -Lindley, 1853

Bulrush

"Scirpus lacustris. 1. A flower surrounded with hypogynous bristles; 2. a seed; 3, a section of it,…

"Typha latifolia; 2, its fruit; 3, a section of the seed; 4, the embryo; 5, a stamen." -Lindley, 1853

Common Bulrush

"Typha latifolia; 2, its fruit; 3, a section of the seed; 4, the embryo; 5, a stamen." -Lindley, 1853

"Sanguisorba officinalis. 1. a flower with a pair of bracts; 2. the same with half the calyx cut away; 3. a ripe fruit, from which the calyx has been removed; 4. a vertical section of fruit and calyx; 5. transverse section of a fruit." -Lindley, 1853

Great Burnet

"Sanguisorba officinalis. 1. a flower with a pair of bracts; 2. the same with half the calyx cut away;…

"Combretum (or Poivrea) purpureum. 1. a flower cut open; 2. a section of the ovary." -Lindley, 1853

Bushwillow

"Combretum (or Poivrea) purpureum. 1. a flower cut open; 2. a section of the ovary." -Lindley, 1853

Akene of a Buttercup.

Buttercup

Akene of a Buttercup.

"Ceratocephalus orthoceras. 1. flower; 2. ripe fruit." -Lindley, 1853

Buttercup

"Ceratocephalus orthoceras. 1. flower; 2. ripe fruit." -Lindley, 1853

Akene of a Buttercup, divided lengthwise, to show the contained seed.

Akene of a Buttercup

Akene of a Buttercup, divided lengthwise, to show the contained seed.

Ranunculus bulbosus or the bulbous buttercup is a perennial weed of the Buttercup family, Ranunculaceae.

Bulbous Buttercup

Ranunculus bulbosus or the bulbous buttercup is a perennial weed of the Buttercup family, Ranunculaceae.

Also known as Ranunculus asiaticus. A herbaceous perennial plant with red or pink flowers. The stems are simple and branched at the base. They generally bloom in May and June.

Persian Buttercup

Also known as Ranunculus asiaticus. A herbaceous perennial plant with red or pink flowers. The stems…

Butternut branch, with accessory buds, the uppermost above the axil.

Butternut Branch

Butternut branch, with accessory buds, the uppermost above the axil.

"Pinguicula vulgaris. 1. calyx, &c. 2. stamen; 3. pistil; 4. longitudinal section of it; 5. half a fruit; 6. seeds, natural size; 7. embryo very much magnified." -Lindley, 1853

Common Butterwort

"Pinguicula vulgaris. 1. calyx, &c. 2. stamen; 3. pistil; 4. longitudinal section of it; 5. half a fruit;…