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قراءة كتاب Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors
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Wild Flowers An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors
being gay deceivers. Sprengel's much-quoted theory would credit moths, butterflies, and even the highly intelligent bees with scant sense; but Darwin, who thoroughly tested it, forever exonerated these insects from imputed stupidity and the flowers from gross dishonesty. He found that many European orchids secrete their nectar between the outer and inner walls of the tube, which a bumblebee can easily pierce, but where Sprengel never thought to look for it. The large lip of this orchis is not fringed, but has a fine picotee edge. The showy violet-purple, long-spurred flowers are alternately set on a stem that is doing its best if it reach a height of two and a half feet.
WATER-SHIELD or WATER TARGET
(Brasenia purpurea; B. peltata of Gray) Water-lily family
Flowers - Small, dull purplish, about 1/2 in. across, on stout footstalks from axils of upper leaves; 3 narrow sepals and petals; stamens 12 to 18; pistils 4 to 18, forming 1 to 3-seeded pods. Stem: From submerged rootstock; slender, branching, several feet long, covered with clear jelly, as are footstalks and lower leaf surfaces. Leaves: On long petioles attached to center of underside of leaf, floating or rising, oval to roundish, 2 to 4 in. long, 1 1/2 to 2 in. wide. Preferred Habitat - Still, rather deep water of ponds and slow streams. Flowering Season - All summer. Distribution - Parts of Asia, Africa, and Australia, Nova Scotia to Cuba, and westward from California to Puget Sound.
Of this pretty water plant Dr. Abbott says, in "Wasteland Wanderings": "I gathered a number of floating, delicate leaves, and endeavored to secure the entire stem also; but this was too difficult a task for an August afternoon. The under side of the stem and leaf are purplish brown and were covered with translucent jelly, embedded in which were millions of what I took to be insects' eggs. They certainly had that appearance. I was far more interested to find that, usually, beneath each leaf there was hiding a little pike. The largest was not two inches in length. When disturbed, they swam a few inches, and seemed wholly 'at sea' if there was not another leaf near by to afford them shelter."
EUROPEAN or COMMON GARDEN COLUMBINE
(Aquilegia vulgaris) Crowfoot family
Flowers - Showy, blue, purple, or white, 1 1/2 to 2 in. broad, or
about as broad as long; spurs stout and strongly incurved.
General characteristics of plant resembling wild columbine.
Preferred Habitat - Escaped from gardens to woods and fields in
Eastern and Middle States. Native of Europe.
Flowering Season - May-July.
A heavier, less graceful flower than either the wild red and yellow columbine or the exquisite, long-spurred, blue and white species (A. coerulea) of the Rocky Mountain region; nevertheless this European immigrant, now making itself at home here, is a charming addition to our flora. How are insects to reach the well of nectar secreted in the tip of its incurved, hooked spur? Certain of the long-lipped bees, large bumblebees, whose tongues have developed as rapidly as the flower, are able to drain it. Hummingbirds, partial to red flowers, fertilize the wild columbine, but let this one alone. Muller watched a female bumblebee making several vain attempts to sip this blue one. Soon the brilliant idea of biting a hole through each spur flashed through her little brain, and the first experiment proving delightfully successful, she proceeded to bite holes through other flowers without first trying to suck them. Apparently she satisfied her feminine conscience with the reflection that the flower which made dining so difficult for its benefactors deserved no better treatment.
FIELD or BRANCHED LARKSPUR; KNIGHT'S-SPUR; LARK-HEEL
(Delphinium Consoilda) Crowfoot family
Flowers - Blue to pinkish and whitish, 1 to 1 1/2 in. long, hung on slender stems and scattered along spreading branches; 5 petal-like sepals, the rear one prolonged into long, slender, curving spur; 2 petals, united. Stem: 1 to 2 1/2 ft. high. Leaves: Divided into very finely cut linear segments. Fruit: Erect, smooth pod tipped with a short beak; open on one side. Preferred Habitat - Roadsides and fields. Flowering Season - June-August. Distribution - Naturalized from Europe; from New Jersey southward, occasionally escaped from gardens farther north.
Keats should certainly have extolled the larkspurs in his sonnet on blue. No more beautiful group of plants contributes to the charm of gardens, woods, and roadsides, where some have escaped cultivation and become naturalized, than the delphinium, that take their name from a fancied resemblance to a dolphin (delphin), given them by Linnaeus in one of his wild flights of imagination. Having lost the power to fertilize themselves, according to Muller, they are pollenized by both bees and butterflies, insects whose tongues have kept pace with the development of certain flowers, such as the larkspur, columbine, and violet, that they may reach into the deep recesses of the spurs where the nectar is hidden from all but benefactors.
The TALL WILD LARKSPUR (D. urceolatum; D. exaltatum of Gray) waves long, crowded, downy wands of intense purplish blue in the rich woods of Western Pennsylvania, southward to the Carolinas and Alabama, and westward to Nebraska. Its spur is nearly straight, not to increase the difficulty a bee must have in pressing his lips through the upper and lower petals to reach the nectar at the end of it. First, the stamens successively raise themselves in the passage back of the petals to dust his head; then, when each has shed its pollen and bent down again, the pistil takes its turn in occupying the place, so that a pollen-laden bee, coming to visit the blossom from an earlier flower; can scarcely help fertilizing it. It is said there are but two insects in Europe with lips long enough to reach the bottom of the long horn of plenty hung by the BEE LARKSPUR (D. elatum), that we know only in gardens here. Its yellowish bearded lower petals readily deceive one into thinking a bee has just alighted there.
>From April to June the DWARF LARKSPUR or STAGGER-WEED (D. tricorne), which, however, may sometimes grow three feet high, lifts a loose raceme of blue, rarely white, flowers an inch or more long, at the end of a stout stem rising from a tuberous root. Its slightly ascending spur, its three widely spreading seed vessels, and the deeply cut leaf of from five to seven divisions are distinguishing characteristics. From Western Pennsylvania and Georgia to Arkansas and Minnesota it is found in rather stiff soil. Butterflies, which prefer erect flowers, have some difficulty to cling while they drain the almost upright spurs, especially the Papilios, which usually suck with their wings in motion. But the bees, to which the delphinium are best adapted, although butterflies visit them quite as frequently, find a convenient landing place prepared for them, and fertilize the flower while they sip with ease.
More slender, downy, and dwarf of stem than the preceding is the
CAROLINA LARKSPUR (D. Carolinianum), whose blue flowers, varying
to white, and its very finely cleft leaves, may be found in the
South, on prairies in the North and West, and in the Rocky
Mountain region.
LIVER-LEAF; HEPATICA; LIVERWORT; ROUND-LOBED or KIDNEY
LIVER-LEAF; NOBLE LIVER-WORT; SQUIRREL CUP
(Hepalica Hepatica; H. triloba of Gray) Crowfoot family
Flowers - Blue, lavender, purple, pinkish, or white; occasionally, not always, fragrant; 6 to 12 petal-like, colored sepals (not petals, as they appear to be), oval or oblong; numerous stamens, all bearing anthers; pistils numerous 3 small, sessile leaves, forming an involucre directly