Section of the ovary of Anemone, showing its suspended ovule.
Section of the ovary of Buckwheat, showing the erect ovule.
Section of the ovary of a Buttercup, lengthwise, showing its ascending ovule.
Circaea with angles bearing little lobes.
Flower of a Cleome of the section Gynandropsis, showing broadened receptacles to bear petals, lengthened…
Cross section of the ovary of Frost-Weed (Helianthemum), with three parietal placenta, bearing ovules.
Magnified pollen of Hibiscus and other Mallow plants, beset with prickly projections.
Cross-section of an ovary of Hypericum graveolens, the three large placenta meeting in the centre, so…
Four grains united, as in most of the Heath family.
Three early stages in the growth of ovule of a Magnolia, showing the forming outer and inner coats,…
Pollen, a pair of pollinia of a Milkweed, Asclepias, attached by stalks to a gland.
Pollinium of an Orchis (Habenaria), with its stalks attached to a sticky gland.
As it were of three grains or cells united; the lateral empty and light.
Compound 3-carpellary pistil of common St. John's-wort, cut across: the three styles separate.
Pistil of a Sandwort, with vertical and transverse section of the ovary: free central placenta.
Two simple carpals or pistil-leaves, united at the base only, cut across both above and below.
The same of shrubby St. John's-wort; the three styles as well as ovaries here united into one.
Compound 3-carpellary pistil of Tradescantia or Spiderwort; the three stigmas as well as styles and…
Simple pistil of Podophyllum, cut across, showing ovules borne on placenta.
Magnified pollen of a Lily, smooth and oval.
Pollen of Echinocystis, grooved lengthwise.
Pollen of Sicyos, with bristly points and smooth bands.
Pollen of Musk Plant (Mimulus), with spiral grooves.
Pollen of Succory, twelve-sided and dotted.
Evening Primrose, the three lobes as large as the central body.
Longitudinal section of flower of Silene Pennsylvanica, showing stipe between calyx and corolla.
Cells of anther each opening by an uplifted valve.
Very short filament bearing a single anther-cell; it is open from top to bottom, showing the pollen…
Stamens of the mint family. Of a Monarda: the two anther-cells with bases divergent so that they are…
Cells opening by a terminal hole.