Onion Leaf
"Longitudinal section of an onion leaf. sca, thickened base of leaf, forming a bulb-scale; s, thin sheath…
Smilax
"Stem of "Smilax" (Myrsiphyllum). l, scale-like leaves; cl, cladophyll, or leaf-like branch, growing…
Grafting
"Grafting. At the left scion and stock are shown ready to be united; at the right they are joined and…
Vernation
"Types of vernation. 1, 2, cherry; 3, 4, European walnut; 5, 6, snowball; 7, lady's mantle; 8, oxalis."…
Diagram of the Body Plan
Plan of the body in cross-section. The systems in the body are arranged in a certain way which is the…
Pea Leaf
"Pinnately compound leaf of pea. A tendril takes the place of a terminal leaflet." -Bergen, 1896
Compass Plant
"Leaves standing nearly vertical in compass-plant. (Silphium laciniatum). A, view from east or west;…
Common Pitcher Plant
"Common Pitcher-Plant (Sarracenia purpurea). At the right one of the pitcher-like leaves is shown in…
Sundew Leaves
"Leaves of sundew. The one at the left has all its tentacles closed over captured prey; the one at the…
Flower Parts
"The parts of the flower. cal, calyx; cor, corolla; st, stamens; p, pistil." -Bergen, 1896
Sweet Pea Flower
"Irregular corolla of sweet pea. A, side view; B, front view. s, standard; w, w, wings; k, keel." -Bergen,…
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
Stamens and Pistil
"Stamens and pistil of the grape, with a nectar gland, g, between each pair of stamens." -Bergen, 1896
Violet
"A violet with cleistogamous flowers. The objects which look like flower-buds are cleistogamous flowers…
Orange
"Cross-section of an orange. a, axis of fruit with dots showing cut-off ends of fibro-vascular bundles;…
Tilia Fruit
"Fruits of Linden, with a bract joined to the peduncle and forming a wing." -Bergen, 1896
Datura Fruit
"Fruits adapted for dispersal by the shaking action of the wind: jimson weed (Datura)." -Bergen, 1896
Rockweed Section
"Transverse section of conceptacle of a rockweed (Fucus platycarpus). h, hairs; a, antheridia; o, oogonia."…
Honey Fungus
"A mushroom (Agaricus melleus). my, mycelium; c, c', c'', young 'buttons'; st, stipe or stalk; r, ring;…
Fungus Gills
"Portions of gills of a fungus (Agaricus). A, slightly magnified; B, one of the parts of A, more magnified.…
Fern Spore Plant
"Spore-plant of a fern (Aspidium filix-mas). A, part of a rootstock and fronds; fr, young fronds unrollin.…
Scouring Rush
"A scouring-rush (Equisetum sylvaticum). At the right is a colorless fertile stem, in the middle a green…
Spruce Ovule
"Longitudinal section through fertilized ovule of a spruce. p, pollen grains; t, pollen tubes; n neck…
Leaf Bases
"A, Shapes of bases of leaves; B, Peltate leaf of Tropaeolum. 1, heart-shaped; 2, arrow-shaped; 3, halberd-shaped."…
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,…
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;…