Wild Flowers: An Aid to Knowledge of Our Wild Flowers and Their Insect VisitorsBlanchan, Neltje
Science
Wild Flowers: An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors
Blanchan, Neltje
Wild flowers -- North America
Another familiar member of the Grape family, the VIRGINIA
CREEPER, FALSE GRAPE, AMERICAN or FIVE-LEAVED IVY, also
erroneously called WOODBINE (Parthenocissus quinquefolia;
formerly Ampelopsis quinquefolia) - is far more charming in its
glorious autumnal foliage, when its small dark blue berries hang
from red peduncles, than when its insignificant greenish flower
clusters appear in July. The leaves, compounded of five leaflets,
should sufficiently distinguish the harmless vine from the
three-leaved poison ivy, sometimes confounded with it. From
Manitoba and Mexico to the Atlantic Ocean, and even in Cuba, the
Virginia creeper rambles over thickets, fences, and walls,
ascends trees, festoons rocky woodlands, drapes our verandas,
making its way with the help of modified flower stalks that are
now branching tendrils, each branch bearing an adhesive disk at
the end. "In the course of about two days after a tendril has
arranged its branches so as to press upon any surface," says
Darwin, "its curved tips swell, become bright red, and form on
their undersides little disks or cushions with which they adhere
firmly." It is supposed that these disks secrete a cement. At any
rate, we know that they have a very tenacious hold, because often
one contracting tendril, as elastic as a steel spring, supports,
by means of these little disks, the entire weight of the branch
it lifts up. Darwin concluded that a tendril with five
disk-bearing branches, on which he experimented, would stand a
strain of ten pounds, even after ten years' exposure to high
winds and softening rains.
WHITE VIOLETS
(Viola) Violet family
Three small-flowered, white, purple-veined, and almost beardless
species which prefer to dwell in moist meadows, damp, mossy
places, and along the borders of streams, are the LANCE-LEAVED
VIOLET (V. lanceolata), the PRIMROSE-LEAVED VIOLET (V.
prirnulaefolia), and the SWEET WHITE VIOLET (V. blanda), whose
leaves show successive gradations from the narrow, tapering,
smooth, long-petioled blades of the first to the oval form of the
second and the almost circular, cordate leaf of the delicately
fragrant, little white blanda, the dearest violet of all.
Inasmuch as these are short-spurred species, requiring no effort
for bees to drain their nectaries, no footholds in the form of
beards on the side petals are provided for them. The purple
veinings show the stupidest visitor the path to the sweets.
Public-domain text, read in full here on John Shaqi.
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