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
Gay companies of these charming, bright little blossoms hidden
away in the woods suggest a swarm of tiny mauve butterflies that
have settled among the wintergreen leaves. Unlike the common
milkwort and many of its kin that grow in clover-like heads, each
one of the gay wings has beauty enough to stand alone, Its oddity
of structure, its lovely color and enticing fringe, lead one to
suspect it of extraordinary desire to woo some insect that will
carry its pollen from blossom to blossom and so enable the plant
to produce cross-fertilized seed to counteract the evil
tendencies resulting from the more prolific self-fertilized
cleistogamous flowers buried in the ground below. It has been
said that the fringed polygala keeps "one flower for beauty and
one for use"; "one playful flower for the world, another for
serious use and posterity"; but surely the showy flowers, the
"giddy sisters," borne by all cleistogamous species to save them
from degenerating through close inbreeding, are no idle,
irresponsible beauties. Let us watch a bumblebee as she alights
on the convenient fringe which edges the lower petal of this
milkwort. Now the weight of her body so depresses the keel, or
tubular petals, wherein the stamens and pistil lie protected from
the rain and useless insects, that as soon as it is pressed
downward a spoon-tipped pistil pushes out the pollen through the
slit on the top on the bee's abdomen. The stigmatic surface of
the pistil is on the opposite side of the spoon, nearest the base
of the flower, to guard against self-pollination. After the
pollen has been removed, a bumblebee, already dusted from other
blossoms, must leave some on the stigma as she sucks the nectar.
Indeed, every feature possessed by this pretty flower has been
developed for the most serious purpose of life - the salvation of
the species.
Only locally common throughout a wide area, embracing the eastern
half of the United States and Canada, is the RACEMED MILKWORT (P.
polygama), whose small, purple-pink, but showy flowers, clustered
along the upper part of numerous leafy stems, are found in dry
soil during June and July. Like the fringed milkwort, this one
bears many cleistogamous, or blind flowers, on underground
branches, flowers that always set an abundance of fertile
self-planted seed in case of failure to form any on the part of
their showy sisters, which are utterly dependent upon the bee's
ministrations. During prolonged stormy weather few insects are
abroad.
SWAMP ROSE-MALLOW; MALLOW ROSE
(Hibiscus Moscheutos) Mallow family
Public-domain text, read in full here on John Shaqi.
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