Cross section of an ovary of Hypericum graveolens with the placentae now separate and rounded.
"And when the dew that lay was gone up, behold, upon the face of the wilderness a small round thing,…
"1. Hedera Helix; 2. a flower of Dimorphanthus edulis; 3. perpendicular section of the ovary; 4. undivided…
This shows the cluster of two leaves, bright green, of the Jersey Pine, Pinus virginiana, (Keeler, 1915).
Larch, or Larix, is a genus of hardy, deciduous, coniferous trees of very graceful habit. They bear…
This shows the fruiting ament of Large-toothed Aspen, Populus grandidentata, (Keeler, 1915).
Its calyx and corolla displayed; the five large parts are the sepals; the four smaller, of two shapes,…
"Cassytha filiformis. 1. a flower; 2. a fruit; 3. a section of it transversely." -Lindley, 1853
This illustration shows a lentil plant. Lentils are the round, flat seeds of a small leguminous plant…
A stone on which various Lichens are growing, such as (passing from left to right) a Parmelia, a Sticta,…
"Nymphaea coerulea. 1. a perpendicular section of a seed of N. alba; 2. half an embryo, showing the…
Diagram of a flower of Linden, showing the calyx valvate and corolla imbricate in the bud, etc.
One of the frondose Liverworts, Steetzia, otherwise like a Jungermannia; the spore-case not yet protruded…
This shows the cluster of three, slightly twisted leaves of the Loblolly Pine, Pinus taeda, (Keeler,…
These are the seeds or racemes of the Locust blossoms, Robinia pseudoacacia,(Keeler, 1915).
Of the Mahogany family, "Ekebergia Senegalensis. 1. a flower; 2. the calyx and staminal tube; 3. a transverse…
A young prothallus of a Maiden-hair and an older one with the first fern-leaf developed from near the…
A young prothallus of a Maiden-hair, middle portion of the younger one, partly among the rootlets, the…
Surface of a young Maple wood from which the bark has been torn away, showing the bark (on the left)…
Lower end of Maple root magnified, the root seen just as root-hairs are beginning to for a little behind…
Seedling Maple, of the natural size; the root well supplied with root hairs, here large enough to be…
Here is a representation of two seeds of the maple, with their wings. They always grow in this way,…
"Marignia obtusifolia. 1. a flower; 2. the same divided vertically; 3. a fruit; 4. a section of the…
"Mayaca vandellii; 1. a flower; 2. a cross section of its ovary; 3. a seed vessel; 4. two seeds, one…