229 illustrations of trees including: quaking aspen, queensland nut, quince, red birch, red maple, red oak, rock elm, rocky mountain juniper, royal palm, rubber tree, sabal, sago, salix, sand pine, sandalwood, sandbox tree, sapodilla, sapote, sassafras, scarlet oak, scotch pine, screw pine, sequoia, shagbark hickory, silver fir, silver bell, snowdrop, spruce, stone pine, sugar maple, sumac, sweet birch, and sycamore
"Longitudinal section through fertilized ovule of a spruce. p, pollen grains; t, pollen tubes; n neck…
Leaves - compound (odd-feathered; leaflets eleven to thirty-one); alternate; edge of leaflets evenly…
Illustrated in a stem of young pine attacked by peridermium pini. Peridermium pini is a fungus that…
"Stemless Palm. b, spadix, with spathe forming a hood over fruit; c, fruit, about one-fifth natural…
Also known as Torreya taxifolia. A plant found in the Southeastern United States.
Stone pine and parasol pine are the common names of pinus pinea. The tree grows between fifty and sixty…
Leaves - simple, opposite; edge lobed, with the lobes very finely sharply toothed. Outline - rounded…
"Styrax leiophylla. 1. a flower natural size; 2. ditto cut open; 3. stamen seen in front; 4. ovary,…
Leaves - simple; opposite; edge lobed, with the lobes very sparingly and coarsely sharp-toothed or the…
Sumac is any one of approximately 250 species of flowering plants in the genus Rhus and related genera,…
Also known as Quercus michauxii. The branch of a Swamp Chestnut Oak tree, native to the wetlands of…
This shows part of the fruiting ament of the Swamp Cottonwood, Populus heterophylla, (Keeler, 1915).
This shows the leaf of the Swamp Cottonwood, Populus heterophylla, (Keeler, 1915).
Also known as Populus heterophylla. The branch from a Swamp Cottonwood tree, native to warm regions…
Also known as Hicoria minima. The branch of a Swamp Hickory tree, which produces pear-shaped nuts.
Also known as Quercus laurifolia. The branch of a Swamp Laurel Oak, native to the southeast United States.
Also known as Quercus palustris. A species of red oak tree native to eastern United States.
Leaves - simple; alternate; edge quite deeply wavy-toothed. Outline - reverse egg-shape or oval. Apex…
Sweet bay is the common name of laurus nobilis. The leaves are stiff, dull green, and alternate. The…
Leaves - Simple, alternate, edge entire. Outline - long oval or slightly reverse egg-shape. Apex, slightly…
This shows the erect strobile, or fruit, of the Sweet Birch, Betula lenta (Keeler, 1915).
Also known as Betula lenta. A species of birch native to eastern North America.
Leaves - simple; alternate; edge finely and sharply double-toothed. Outline - egg-shape. Apex - pointed.…
Leaves - compound (hand-shaped; leaflets, usually five, sometimes seven); opposite; edge toothed. Outline…
Also known as Malus coronaria. The branch of a Sweet Crabapple tree, native to the southern United States.
Sweet gum and bilsted alligator tree are the common names of liquidambar styraciflua. The leaves are…
Leaves - simple; alternate; edge deeply lobed (lobes finely and sharply toothed throughout). Outline…
Leaves - simple; opposite; edge closely and sharply toothed. Outline - egg-shape. Apex - pointed. Base…
Swiss stone pine is the common name of pinus cembra. The leaves are marked with silver lines and are…
The name applied to a species of maple trees. It occurs in abundance in the western states, and is frequently…
"Symplocos laxiflora. 1. expanded flower; 2. corolla cut open; 3. a stamen; 4. longitudinal section…