Stamen Parts
"Parts of a stamen. A, front; B, back. a, anther; c, connective; f, filament." -Bergen, 1896
Thistle Stamens
"Stamens of a thistle, with anthers united into a ring. a, united anthers; f, filaments, bearded on…
White Waterlily
"White water-lily. The inner petals and the stamens growing from the ovary." -Bergen, 1896
Petals to Stamens
"Transition from petals to stamens in white water-lily. E, F, G, H, various steps between petal and…
Pollen Discharge
"Modes of discharging pollen. I, by longitudinal slits in the anther-cells (amaryllis); II, by uplifted…
Pollen Grains
"Pollen grains. a, pumpkin; b, enchanter's nightshade; c, Albuca; d, pink; e, hibiscus." -Bergen, 1896
Bees Visiting Flowers
"Bees visiting flowers. At the left, a bumblebee on the flower of the dead nettle; below, a similar…
Clerodendron
"Flower of Clerodendron in two stages. In A (earlier stage) the stamens are mature, while the pistil…
Primrose Flowers
"Dimorphous flowers of the primrose. I, a long-styled flower; II, a short-styled one." -Bergen, 1896
Violet
"A violet with cleistogamous flowers. The objects which look like flower-buds are cleistogamous flowers…
Buttercup Akenes
"Akenes of a buttercup. A, head of akenes; B, section of a single akene. a, seed." -Bergen, 1896
Redcurrant Raceme
"Raceme of common red currant. p, peduncle; p', pedicel; br, bract." -Bergen, 1896
Yarrow
"Head of yarrow. A, top view; B, lengthwise section. re, receptacle; i, involucre; r, ray-flowers; d,…
Inflorescence
"Diagrams of inflorescence. A, panicle; B, raceme; C, spike; D, head; E, umbel." -Bergen, 1896
Mouse-Ear Chickweed
"Compound cyme of mouse-ear chickweed. t, the terminal (oldest) flower." -Bergen, 1896
Grass Inflorescence
"Diagram of inflorescence of a grass. g, sterile glumes; P1, a flowering glume; P2, a scaly bract (palea);…
Fescue Grass
"Fescue-grass (Festuca pratensis). A, spikelet; B, a flower, the lodicules in front and the palea behind;…
Sedge
"Inflorescence, flower, and seed, of a sedge. (Great Bulrush, Scirpus lacustris.) A, magnified flower,…
Common Sweet Flag
"Acorus calamus. A, spadix; B, a single flower, enlarged; C, diagram of flower, enlarged." -Bergen,…
Iris
"Iris. I, flower; II, seed, longitudinal section; III, flower with outer segments of perianth removed;…
Iris
"Iris. I, flower, longitudinal section, ov., ovary; II, diagram, showing stigmas opposite the stamens;…
Alder Flowers
"Alnus glutinosa. A, a flowering twig; s, staminate catkins; p, pistillate catkins; B, a group of staminate…
Elm Flowers
"Ulmus campestris. A, a flowering twig; B, a flower; C, longitudinal section of a flower; D, a fruit."…
Flowering Spurge
"Euphorbia corollata. A, flower-cluster with involucre, the whole appearing like a single flower; B,…
Heartsease
"Viola tricolor. A, stamens and pistil; B, pistil with stamens removed; C, pod split open." -Bergen,…
Begonia
"Begonia Flowers. A, staminate flower; B, pistillate flower; C, twisted stigmas, enlarged; D, cross-section…
Umbelliferae
"Flower and fruit of Umbelliferae. A, flower of Foeniculum; B, fruit of Heracleum; C, fruit of Heracleum,…
Milkweed
"Flower of Asclepias Cornuti. A, entire flower; B, vertical section; C, diagram; D, details of pollen-masses…
Plantain Flowers
"Flowers of plantain (Plantago), enlarged. A, earlier stage, pistil mature, stamens not yet appearing…
Cornflower
"Bachelor's Button. I, vertical section of the receptacle; II, style and forked stigma; III, corolla,…
Cornflower
"Bachelor's Button. I, a tubular flower; anth, the united anthers; II, fruit; III, fruit, vertical section;…
Yarrow
"Flower-cluster of yarrow (Achillea Millefolium). A, head seen from above; B, longitudinal section;…
