Nature Notes From Crater Lake
Volume 13, October 1947
Early Spring Flowers at Crater
Lake National Park
By Dr. Ruth E. Hopson, Instructor, Field School of Nature
Appreciation
As the weather grows steadily warmer in
early June and the days of sunshine begin to out-number those of storm,
the snow banks slowly dwindle in the park. In the damp, brown, bare
spots that appear under the outer branches of the mountain hemlock trees
and in the open spaces beyond, the pale yellow-green spears of smooth
woodrush (Luzula glabrata) replace the snow. The leaves, even
before they have obtained their full quota of chlorophyll, separate to
expose a flat-topped cluster of tiny flower buds. Sometimes several of
these grass-like plants may be found about the thinning edges of the
snowbanks, each plant in a circular pit of its own making. A typical
display contains all stages of development from spears appearing above
the ground that is still wet from the recent snowbanks to fully
developed plants with their green ribbon-like leaves and their feathery
brown inflorescences. To one familiar with the forests of mountain
hemlock of the Hudsonian Zone and with the succession of plants that is
found there during the short growing season, the smooth woodrush is the
herald of coming summer, the promise of the gorgeous display of mountain
flowers that is to follow in the meadows close by.
Where the heavy snows of winter have
recently lain, such plants as creeping Crater Lake currant (Ribes
erythrocarpum) and trailing raspberry (Rubus lasiococcus) are
pressed into the soil. Soon the warmth of the sun is reflected in the
growing energy that enables the twigs and leaves to lift themselves from
the ground to their summer position. Inconspicuous racems of small
saucer-shaped bronze flowers are present almost by the time the leaves
are freely exposed to the air. The white strawberry-like flowers of the
trailing raspberry require more time to develop.
The yellow faces of the smooth woodland
violet (Viola glabella)
reflect the bright light upon the mountain hemlock trees. This violet is
one of the earliest flowers to bloom. In the forests along the coast and
in the valleys of Oregon, the smooth woodland violet blooms in February
or March, at Crater Lake in June or July.
Edging groves of hemlocks, especially
on the back slopes of Applegate and Sun valley, the lamb's tongue, or
glacier lily, (Erythronium grandiflorum) var. pallidum)
nod their yellow heads as snow banks dwindle beside them. Steep rocky
hillsides that have south or southwestern exposures are among the
earliest places to be free of snow. Here rock-loving perennial plants
are waiting to take advantage of the early moisture to enable them to
display their flowers and mature their fruits. The western wind flower
(Anemone occidentalis) is one of these plants. While the leaves are
still tightly folded along the midrib of each linear segment the
translucent white sepals, purple tinged without, form a cup of delicate
beauty on top of each thickened stem. Later in the summer after the
stems have grown tall, heads of plumose achenes (one-seeded fruits) will
have replaced the white cup-like flowers. Backlighted by the sun, each
head then appears with its own hair. One of the most beautiful sights of
the high mountains may be had by looking toward the sun across a
hillside or meadow of western wind flowers when their pale green fluffy
heads are fully matured. Near the summit of Garfield Peak, a smaller
anemone with pale blue flowers, Drummond's windflower (A. drummondii),
is found. The achenes of this species are densely covered with cotton.
Heads of the achenes of Drummond's windflower are therefore much less
showy than those of the western windflower.
Exposed rocky cliffs such as those of
the Garfield Trail are clear of snow early. Here crevices afford footing
for several species of rock-loving plants. Three species of plants that
bloom among the first are usually found elsewhere in the Cascades only
above timberline in the Arctic-Alpine Zone. The flowers of the mountain
sorrel (Oxyria digyna)
are inconspicuous, but the color scheme of red and green and the pattern
of circles and straight lines formed by the kidney shaped leaves and the
straight racemes of tiny flowers make this plant easy to recognize. The
slender polemonium or Jacob's ladder (Polemonium shastense) is a
delicate study in pastels. The large clusters of pale blue and yellow
flowers often just balance the soft green mass that is made up of long
pinnately compound leaves. A lone plant of feather-leaved fleabane
(Erigeron compositus), with its finely divided leaves, grows from a
soil pocket in the cliff about half way up Garfield Trail. By the time
the slender polemonium is in profuse bloom, the fleabane is just
lengthening the strap flowers of its single flowerhead.
Two crucifers bloom early along the
trail. Members of the
Cruciferae or mustard family are marked by having four petals and
six stamens, two of them shorter than the other four. The dagger-pod
(Parrya cheiranthoidea) is recognized by its long narrow gray basal
leaves and its deep purple flowers. The pods of this species indicate
clearly the reason for the name, dagger-pod. A small species of
rockcress (Arabis holboellii var. secunda) is found
scattered among the rocks. Each flower and later each elongating pod is
turned to one side of the extended flower stalk.
Before its leaves have unfolded,
bleeding heart (Dicentra formosa)
is in bloom. The flowers are typical of the species but the leaves are
coarser and less finely divided than is usual for this species of lower
elevations.
Bright patches of yellow and green
among the rocks are apt to be fringed-leaved cinquefoil (Potentilla
flabellifolia). The flowers that resemble buttercups and the leaves
that look like fringed "three-leaved clovers" signify this species.
A number of shrubs bloom in the
Garfield rock gardens while snow is yet deep on the slopes below. Two
species of bushy currants are found side by side in some places. Both
develop racemes of creamy-white tubular flowers at about the same time.
The waxy currant (Ribes cereum) has small smooth leaves. The
gummy currant (Ribes viscosissimum) has larger sticky leaves.
Although the service berry
(Amelanchier florida) is dwarfed along the Garfield Trail its
blossoms of white strap-shaped petals almost cover the bushes. The
leaves of the service berry are easy to recognize because they are oval
to almost round and notched about half the margin that is away from the
twig.
Large areas of the open rocky slopes
are carpeted by two creeping shrubs that produce their flowers while
snowbanks remain closeby. The rigid, brick-red branches, conspicuous
among the glossy, leathery evergreen leaves and the racemes of dainty
bell-like pale pink flowers make the pinemat manzanita (Arctostaphylos
nevadensis) an attractive ground cover. The lovely pattern produced
by the small, holly-like, deep green, shiny leaves and the puffs of tiny
lavender flowers of the squaw carpet (Ceanothus prostratus) is
equally attractive.
The damp soil of the mountain meadows
at first appears almost destitute of life. Here and there the clumps of
brilliant red growing tips of Newberry's knotweed (Polygonium
newberryi) push above the uniformly brown surface of the ground.
This plant is least attractive during its flowering season. The tiny,
papery white flowers that cluster in the axils of the leaves are so
inconspicuous that a person looking directly at the plant in full bloom
often asks what the flowers are like. Nevertheless, each delicate flower
proves to be a delightful surprise to one who chances to examine one
with the aid of a hand lens. Following the blooming period, glory
returns to the knotweed as its dying leaves turn scarlet. If one chances
to view these leaves against the sun they appear translucent like
stained glass windows. But this is a picture of late August, not early
June.
Among the patches of red tips of
growing Newberry's knotweed, steer's head, (Dicentra uniflora) is
an attractive surprise to anyone who discovers it. The single
rose-colored flower, held at an angle barely clearing the ground,
suggests a tiny steer's head even to many who do not know its name. Each
flower is surrounded by two or three finely divided gray-green
triangular leaves that lie flat on the ground.
Spring beauties (Claytonia
lanceolata) are the most abundant flowers on the open slopes. As
they push through the earth, the two lance-shaped leaves are held
tightly together, like hands over their heads. Soon they separate and
are lowered to their characteristic position opposite buds. As the buds
open one at a time, the peduncle straightens and holds up the flower
that looks like a deep saucer of delicate pink-striped china.
The rosettes formed by the deep-green
spatulate leaves of pussypaws
(Spragus umbellata) are at first small and tight against the
ground. The first dense cluster of tiny flowers are greenish. As the
season progresses, the clusters become more fluffy and the flowers turn
white, then red, all the while the rosettes of leaves are increasing in
size.
A small yellow violet (Viola venosa)
with gray-green leaves is so inconspicuous that it is easily overlooked.
Close examination, however shows it to be an unusual violet that often
makes the most of complementary colors, since the back of the upper
petals may be purple and the other petals are purple-violet.
The rainbow colors of the spider-web
paintbrush (Castilleja arachnoides) blend perfectly into the
pumice slopes. The paintbrush tips enlarge as the flowers bloom farther
and farther down the stem. This plant is covered by a fine cobwebby
pubescence that adds a delightfully soft texture to its delicate
coloring.
Dense, cottony plots of alpine
antennaria (Antennaria media)
look like irregular sections of a patchwork quilt on these mountain
meadows. Tiny stems with reduced leaves and clusters of papery white
flower heads rise a few inches from each basal clump of leaves. Other
plants that may be found in bloom in the mountain meadows during the
early summer are: varied-leaved phacelia (Phacelia heterphylla),
alpine agoseris (Agoseris alpestris), blue stickseed (Hackelia
jessicae), and several species of sedges (Carex sp.).
Three shrubs that are common about the
springs or along streams begin to flower while patches of snow still
remain; the catkins appear on the Eastwood willow (Salix eastwoodae),
the deep rose of the flower buds make spots of color on the mountain
spiraea (Spiraea densiflora),
and the yellow twin-flowers blend with the yellow-green leaves of the
black twinberry (Lonicera involucrata). In soggy reaches along
the streams and about the springs, the ground is often covered with the
tiny Gormon's buttercup (Ranunculus gormandii). Taller plants
soon extend their flowering racemes above the mat of mosses and
buttercups. The elephant's heads, (Pedicularis groenlandicum)
make conspicuous patches of rose color, as do the alpine shooting stars
(Dodecatheon alpinum). The slender stalks of the green and white
bog orchids (Habernaria stricta and H. dilatata) with
their sweet-scented exquisite flowers add much to the beauty of the
scene. At this time a few white flowers are peeking out of the flat
terminal flower clusters of the northern valerian (Valeriana
sitchensis), and the white flowers in the dense, slender heads of
the bistort (Polygonum bistortoides) are also in evidence.
By the time the snows are gone, most of
these flowers have already produced their first fruits. Many of them
have a system of flowering that enables them to keep producing flowers
farther up the stem as long as the moisture and temperature conditions
are favorable, thus a long season results in abundance of seed, yet a
short season permits maturity of a few fruits at least. The early spring
scene shifts rapidly, so a markedly different one greets the visitors
during July and August. Some year come early, see the early spring
flowers!