(Houstonia caerulea) Madder family
Flowers - Very small, light to purplish blue or white, with
yellow center, and borne at end of each erect slender stem that
rises from 3 to 7 in. high. Corolla funnel-shaped, with 4 oval,
pointed, spreading lobes that
equal the slender tube in length;
rarely the corolla has more divisions; 4 stamens inserted on tube
of corolla; 2 stigmas; calyx 4-lobed. Leaves: Opposite, seated on
stem, oblong, tiny; the lower ones spatulate. Fruit: A 2-lobed
pod, broader than long, its upper half free from calyx; seeds
deeply concave. Root stock: Slender, spreading, forming dense
tufts.
Preferred Habitat - Moist meadows, wet rocks and banks.
Flowering Season - April-July, or sparsely through summer.
Distribution - Eastern Canada and United States west to Michigan,
south to Georgia and Alabama.
Millions of these dainty wee flowers, scattered through the grass
of moist meadows and by the wayside, reflect the blue and the
serenity of heaven in their pure, upturned faces. Where the white
variety grows, one might think a light snowfall had powdered the
grass, or a milky way of tiny floral stars had streaked a
terrestrial path. Linnaeus named the flower for Dr. Houston, a
young English physician, botanist, and collector, who died in
South America in 1733, after an exhausting tramp about the Gulf
of Mexico.
To secure cross-fertilization, the object toward which so much
marvelous floral organism is directed, this little plant puts
forth two forms of blossoms - one with the stamens in the lower
portion of the corolla tube, and the stigmas exserted; the other
form with the stigmas below, and the stamens elevated to the
mouth of the corolla. But the two kinds do not grow in the same
patch, seed from either producing after its kind. Many insects
visit these blossoms, but chiefly small bees and butterflies.
Conspicuous among the latter is the common little meadow
fritillary (Brenthis bellona), whose tawny, dark-speckled wings
expand and close in apparent ecstasy as he tastes the tiny drop
of nectar in each dainty enameled cup. Coming to feast with his
tongue dusted from anthers nearest the nectary, he pollenizes the
large stigmas of a short-styled blossom without touching its tall
anthers. But it is evident that he could not be depended on to
fertilize the long-styled form, with its smaller stigma, because
of this ability to insert his slender tongue from the side where
it avoids contact. Flies and beetles enter the blossoms, but
small bees are best adapted as all-round benefactors. This
simple-looking blossom, that measures barely half an inch across,
is clever enough to multiply its lovely species a thousand fold,
while many a larger, and therefore one might suppose a wiser,
flower dwindles toward extinction.
John Burroughs found a single bluet in blossom one January, near
Washington, when the clump of earth on which it grew was frozen
solid. A pot of roots gathered in autumn and placed in a sunny
window has sent up a little colony of star-like flowers
throughout a winter.
WILD, COMMON, or CARD TEASEL; GYPSY COMBS
(Dipsacus sylvestris) Teasel family
Flowers - Purple or lilac, small, packed in dense, cylindric
heads, 3 to 4 in. long; growing singly on ends of footstalks, the
flowers set among stiffly pointed, slender scales. Calyx
cup-shaped, 4-toothed. Corolla 4-lobed; stamens 4; leaves of
involucre, slender, bristled, curved upward as high as
flower-head or beyond. Stems: 3 to 6 ft. high, stout, branched,
leafy, with numerous short prickles. Leaves: Opposite,
lance-shaped, seated on stem, with bristles along the stout
midrib.
Preferred Habitat - Roadsides and waste places.
Flowering Season - July-September.
Distribution - Maine to Virginia, westward to Ontario and the
Mississippi. Europe and Asia.
Manufacturers find that no invention can equal the natural teasel
head for raising a nap on woolen cloth, because it breaks at any
serious obstruction, whereas a metal substitute, in such a case,
tears the material. Accordingly, the plant is largely cultivated
in the west of England, and quantities that have been imported
from France and Germany may be seen in wagons on the way to the
factories in any of the woolen-trade towns. After the
flower-heads wither, the stems are cut about eight inches long,
stripped of prickles, to provide a handle, and after drying, the
natural tool is ready for use.
Bristling with armor, the teasel is not often attacked by
browsing cattle. Occasionally even the upper leaf surfaces are
dotted over with prickles enough to tear a tender tongue. This is
a curious feature, for prickles usually grow out of veins. In the
receptacle formed where the bases of the upper leaves grow
together, rain and dew are found collected - a certain cure for
warts, country people say. Venus' Cup, Bath, or Basin, and Water
Thistle, are a few of the teasel's folk names earned by its
curious little tank. In it many small insects are drowned, and
these are supposed to contribute nourishment to the plant; for
Mr. Francis Darwin has noted that protoplasmic filaments reach
out into the liquid.
Owing to the stiff spines which radiate from the flower cluster,
the bumblebees, which principally fertilize it, can reach the
florets only with their heads, and not pollenize them by merely
crawling over them as in the true compositae. But by first
maturing its anthers, then when they have shed their pollen,
elevating its stigmas, the teasel prevents self-fertilization.
HAREBELL or HAIRBELL; BLUE BELLS of SCOTLAND; LADY'S THIMBLE
(Campanula rotundifolia) Bellflower family
Flowers - Bright blue or violet blue, bell-shaped, 1/2 in. long
or over, drooping from hair-like stalks. Calyx of 5-pointed,
narrow, spreading lobes; slender stamens alternate with lobes of
corolla, and borne on summit of calyx tube, which is adherent to
ovary; pistil with 3 stigmas in maturity only. Stem: Very
slender, 6 in. to 3 ft. high, often several from same root;
simple or branching. Leaves: Lower ones nearly round, usually
withered and gone by flowering season; stem leaves narrow,
pointed, seated on stem. Fruit: An egg-shaped, pendent, 3-celled
capsule with short openings near base; seeds very numerous, tiny.
Preferred Habitat - Moist rocks, uplands.
Flowering Season - June-September.
Distribution - Arctic regions of Europe, Asia, and America;
southward on this continent, through Canada to New Jersey and
Pennsylvania; westward to Nebraska, to Arizona in the Rockies,
and to California in the Sierra Nevadas.
The inaccessible crevice of a precipice, moist rocks sprayed with
the dashing waters of a lake or some tumbling mountain stream,
wind-swept upland meadows, and shady places by the roadside may
hold bright bunches of these hardy bells, swaying with exquisite
grace on tremulous, hair-like stems that are fitted to withstand
the fiercest mountain blasts, however frail they appear. How
dainty, slender, tempting these little flowers are! One gladly
risks a watery grave or broken bones to bring down a bunch from
its aerial cranny.
It was a long stride forward in the evolutionary scale when the
harebell welded its five once separate petals together; first at
the base, then farther and farther up the sides, until a solid
bell-shaped structure resulted. This arrangement which makes
insect fertilization a more certain process because none of the
pollen is lost through apertures, and because the visitor must
enter the flower only at the vital point where the stigmas come
in contact with his pollen-laden body, has given to all the
flowers that have attained to it, marked ascendency.
Like most inverted blossoms, the harebell hangs its head to
protect its nectar and pollen, not only from rain, but from the
intrusion of undesirable crawling insects which would simply
brush off its pollen in the grass before reaching the pistil of
another flower, and so defeat cross-fertilization, the end and
aim of so many blossoms. Advertising for winged insects by its
bright color, the harebell attracts bees, butterflies, and many
others. These visitors cannot well walk on the upright petals,
and sooner or later must clasp the pistil if they would secure
the nectar secreted at the base. In doing so, they will dust
themselves and the immature pistil with the pollen from the
surrounding anthers; but a newly opened flower is incapable of
fertilization. The pollen, although partially discharged in the
unopened bud, is prevented from falling out by a coat of hairs on
the upper part of the style. By the time all the pollen has been
removed by visitors, however, and the stamens which matured early
have withered, the pistil has grown longer, until it looks like
the clapper in a bell; the stigma at its top has separated into
three horizontal lobes which, being sticky on the under side, a
pollen-laden insect on entering the bell must certainly brush
against them and render them fertile. But bumblebees, its chief
benefactors, and others may not have done their duty by the
flower; what then? Why, the stigmas in that case finally bend
backward to reach the left over pollen, and fertilize themselves,
obviously the next best thing for them to do. How one's reverence
increases when one begins to understand, be it ever so little of,
the divine plan!
"Probably the most striking blue and purple wild flowers we
have," says John Burroughs, "are of European origin. These
colors, except with the fall asters and gentians, seem rather
unstable in our flora." This theory is certainly borne out in the
case of the RAMPION, EUROPEAN, or CREEPING BELLFLOWER (C.
rapunculoides), now detected in the act of escaping from gardens
from New Brunswick to Ontario, Southern New York, Pennsylvania,
and Ohio, and making itself very much at home in our fields and
along the waysides. Compared with the delicate little harebell,
it is a plant of rank, rigid habit. Its erect, rather stout stem,
set with elongated oval, hairy, alternate leaves, and crowned
with a one-sided raceme of widely expanded, purple-blue bells
rising about two feet above the ground, has little of the
exquisite grace of its cousin. It blooms from July to September.
This is the species whose roots are eaten by the omnivorous
European peasant.
One of the few native campanulas, the TALL BELLFLOWER (C.
Americana), waves long, slender wands studded with blue or
sometimes whitish flowers high above the ground of moist thickets
and woods throughout the eastern half of this country, but rarely
near the sea. Doubtless the salt air, which intensifies the color
of so many flowers, would brighten its rather slatey blue. The
corolla, which is flat, round, about an inch across, and deeply
cleft into five pointed petals, has the effect of a miniature
pinwheel in motion. Mature flowers have the style elongated, bent
downward, then curved upward, that the stigmas may certainly be
in the way of the visiting insect pollen-laden from an earlier
bloomer, and be cross-fertilized. The larger bees, its
benefactors, which visit it for nectar, touch only the upper side
of the style, on which they must alight; but the anthers waste
pollen by shedding it on all sides. No insect can take shelter
from rain or pass the night in this flower, as he frequently does
in its more hospitable relative, the harebell. English gardeners,
more appreciative than our own of our native flora, frequently
utilize this charming plant in their rockwork, increasing their
stock by a division of the dense, leafy rosettes.
Previous: BLUETS INNOCENCE HOUSTONIA QUAKER LADIES QUAKER BONNETS
Next: VENUS' LOOKINGGLASS CLASPING BELLFLOWER
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