Black Eastern Tiger Swallowtail

An eastern tiger swallowtail black form female nectars on nepeta ‘Walker’s low.’

It’s late spring with the entire summer ahead of us. Nature’s greens are deep and full. Tiger swallowtails (Papilio glaucous) are on the wing now, the first of two times during the Minnesota summer. The first flight is typically in May-June and the second in July-August. The offspring of the second flight overwinter in their chrysalides.

I watch a bright yellow male patrolling his territory, repeating the same route through the large silver maples across the alleyway, over our apple tree and under my neighbor’s birch tree. He is quick to give chase to other males that trespass.

Eastern tiger swallowtail males are always yellow with black stripes and lack the wash of blue on the hind wings.

On this sunny, breezy morning, a black form female nectars in a sea of blue nepeta in our front garden. Her iridescent blue-on-black wings flutter repeatedly from one end of the garden to the other. She is full of energy and free of wing tatters and tears.

The female’s underwings are marked with bright orange spots and light blue scales.

Most eastern tiger swallowtails in Minnesota are yellow with black stripes. However, the female is dimorphic, or appears in two forms: the familiar black-striped yellow and a rarer black form washed with shimmering blue across its hind wings. Faint black stripes are often visible on the dark female.

Just a tiny percentage of females appear in the black form, especially this far north, but are  common in the southern United States. Why? Scientists think that the black form is a mimic of the pipevine swallowtail, which tastes horrible because the caterpillars feed solely on pipevine plants. (Think of monarchs and viceroys, another example of mimicry. Birds hate the taste of monarchs because they eat milkweed. Viceroys closely resemble monarchs, so birds often avoid them.) Pipevine swallowtails occasionally come as far north as Minnesota.

Interested in attracting eastern tiger swallowtails to your yard or garden? Favorite caterpillar foods include: chokecherry, ash, poplar, maple, apple and mountain ash. Adults nectar on many flower species including phlox, milkweed, Joe-Pye weed, blazing star, bee balm/bergamot and red clover.

Violets Aren’t Always Violet!

As a youngster, I thought violets should be just one color: the shade of Crayola violet in my crayon box. In fact, violet flowers aren’t always violet! Many are blue, shades of purple, white and even yellow. The native common violet, or wooly blue violet, grows in almost every Minnesota county and in most of the eastern United States and Canada. It’s what many of us picture when we think “violet” (excluding African violets, which are a different plant family altogether).

The common violet or wooly violet (Viola sororia) blooms from April to June in the eastern United States and Canada.

Violets are a sure sign of spring in Minnesota and bloom from April to June. You’ll often find them in woodlands, thickets, gardens, lawns, along roadsides and even growing in sidewalk cracks. Individual species of violets can be tricky to identify and botanists disagree on how to classify them. Many of the backyard and roadside violets are common violets (Viola sororia), which may be blue, purple or white. The downy yellow violet (Viola pubescens) is also common in most Minnesota counties. It differs from many violets in that the flower stem arises from the leaf axil instead of growing separately from the corm.

The white form of the common violet clearly shows the pollinator “honey guides” on the bottom petal.

This violet came from my mom’s garden. I’d never seen violets this shade and loved them.

The downy yellow violet’s (Viola pubescens) stems and undersides of leaves are covered in soft, downy hair.

A typical native violet has heart-shaped or circular leaves with rounded teeth. In most species, the flower stem grows directly from the corm, which is similar to a bulb. Each leafless stem holds a single five-petaled flower. The purple-veined area on the lower petal is a nectar guide for pollinators. Bees see ultraviolet light and scientists think that the enhanced pattern visible to their eyes helps lead them to the nectar. In early May, typical pollinators are mason bees, tiny sweat bees and skipper butterflies. But, because the early spring weather can be cold and pollinators may be inactive, violets produce a second type of flower called a cleistogamous flower that doesn’t open. It self-pollinates and forms a seed capsule that ripens, bursts and ejects small brown seeds away from the plant. These flowers don’t form until after the trees leaf out. Look for them underneath violet plants later in the summer.

The violet plant is an important host for the caterpillars of many species of fritillary butterflies. Just as monarch larvae feed solely on milkweed plants, most fritillary caterpillars feed only on violets. Humans can eat violet blossoms, but not the rest of the plant, which is toxic. The blossoms provide vitamins A and C. In earlier times, they were used to make a simple, sweet jelly that’s also beautiful. To learn how to make violet jelly, and about other ways the flowers were used, visit PBS Wisconsin’s “The Wisconsin Gardener” for a brief, interesting interview.

Many fritillary caterpillars feed only on violets. This adult great-spangled fritillary (Speyeria cybele)  nectars on pink bergamot.

Violets sometimes form patches, especially in a garden or lawn. They are a good ground cover in shady places where grass does’t grow well. If you have too many growing for your liking, they are easy to remove. Just make sure that you pull out the entire root — and please consider leaving a few for early pollinators and for fritillary caterpillars to eat!

Spring Ephemerals: Hepatica

This year, I look for spring close to home. I haven’t hiked in a nature preserve yet, and we’ve stayed home from our cabin. I miss those places, but I’m enjoying many simple delights right here, including a few native spring flowers. While bloodroot blooms fade, another spring ephemeral¹, hepatica, buds and opens.

Round-lobed hepatica (Hepatica nobilis) blooms range from white to purple in color.

Hepatica, liverleaf, or liverwort, is named for its leaves that are three-lobed and can be a brownish-bronze color (like the human liver) at winter’s end. Each spring, the fuzzy flower stalks push up through the old leaves to bloom in pastels ranging from white to purple. In Minnesota, hepatica can begin blooming anytime from early April into May — before the trees leaf out. Bees, early butterflies, beetles and flies pollinate the small flowers depending on how early they bloom. Fresh green leaves will grow up from beneath the flower stalks to remain until next spring.

Hepatica’s fuzzy flower stalks slowly unfurl to reveal the delicate flowers.

Hepatica leaves are three-lobed. The previous year’s leaves are often brownish-red or bronze and reminded earlier people of the human liver. (Hepatica is from the Greek word for liver.)

In it’s natural setting, hepatica often grows under oak trees — that’s where I first spotted it peeping out among tattered brown leaves one warm April day at our cabin. (I purchased the hepatica in my garden at a local nursery.) It is a woodland wildflower that prefers full spring sun that becomes dappled sun as the trees leaf out. Two species are native to Minnesota — round-lobed and sharp-lobed — and are very similar in appearance. It’s also very well-behaved, so a gardener needn’t worry about hepatica overtaking the garden!

This week in the yard, besides the blooming hepatica, bloodroot leaves unfurled and increased in size as seed pods swelled. Many tiny native bees, and a not-so-tiny queen two-spotted bumble bee, pollinated the spring flowers. A wave of hermit thrushes ate insects and seeds in the backyard most of the week before continuing north to their nesting grounds. 

As the bloodroot blossoms (Sanguinaria canadensis) wilt, the leaves unfold and the seed pods begin to swell.

A queen bumble bee (Bombus bimaculatus) hovers above glory-of-the-snow (Chionodoxa luciliae) blossoms.

A hermit thrush (Catharus guttatus), one of the most ethereal songsters I’ve heard, rests on its journey to northern Minnesota and Canada.

Nesting sites are a hot commodity locally, too: A female mallard sits on her nest completely hidden in our neighbor’s daylily garden. Robins nest in arbor vitae behind the garage and cardinals nest in a neighbor’s small evergreen shrub. Each day, the cardinal pair visits our garden where the male gently feeds his mate. In a few weeks, the begging calls of this year’s first fledglings will fill the air. I look forward to seeing their plump, downy bodies following their parents around the garden!

¹Spring ephemerals are perennial plants that appear quickly in early spring and die back until the next year, such as bloodroot, hepatica, trout lily and Virginia bluebells.

 

Spring: Inconsistent as Usual

Striped squill (Puschkinia scilloides), Siberian squill (Scilla siberica) and crocus bloom before last week’s snowstorm.

Spring in Minnesota is as fitful as ever — in other words, it’s one of the few things that remains normal during the pandemic. A week ago, Saturday was sunny and 70 degrees. Honey bees explored the squill patch and the first bloodroot blossoms unfurled white and gold. Twelve hours later, a cold front settled over the state. More than five inches of heavy, wet snow buried the garden and coated every bud, twig and trunk. Fox sparrows scratched and dug under the garden hedge sending snow, leaves and dirt flying behind them. A chubby American robin plucked the few remaining crabapples from a small tree. When the air warmed above freezing midweek, a few flowers were wilted and tinged with brown, but those that still had a covering of snow perked right up.

Sticky snow transformed a greening world back to winter black and white.

Traces of snow linger in the shady, northern corners of the yard, but most areas look like spring again — for now. While almost all of Minnesota’s record-breaking April snowstorms have occurred mid-month or earlier, that’s not always been true. Remember that April 29-30 storm in 1984? It dumped 9.7 inches of snow on the Twin Cities to close out the month. It’s all part of a typical Minnesota spring. Here’s a look at what’s growing in the backyard now that the snow has melted.

Bright green moss and its spore capsules are a refreshing sight after the snow.

Bloodroot (Sanguinaria canadensis) is one of the earliest spring wildflowers to bloom in Minnesota. Each flower is wrapped in a single leaf before opening.

A honey bee (Apis mellifera) in the Siberian squill is the first one I spotted this year.

A northern magnolia (Magnolia stellata) bud, slightly frostbitten, unfurls on a milder day.

Baby leaves and bud clusters of Canada cherry (Prunus virginiana).

Salt Marsh Beauty

Native salt marsh grasses and pines. (All photos taken with iPhone XS.)

Beauty exists in Earth’s harshest places. On the Florida coast it’s easy to opt for a leisurely seashore walk and pass up a salt barren. Even the name sounds harsh, but these salt marshes, or salterns, along Florida’s West-Central Gulf Coast present their own simple beauty.

At first glance, I notice the Florida slash pines, longleaf pines and native grasses flowing low beneath an open sky. Closer to the water, seagrape, black mangrove and red mangrove grow. Songs of mockingbirds, mourning doves and northern cardinals blend with the swish of grass and pine needles. Delicate Spanish moss drapes many trees and billows in the unceasing wind. The birds quiet down in the late afternoon and leave a stillness so complete that I feel its weight — and relish it in these unsettling days.

Seagrapes (Coccoloba uvifera) anchor the soil and produce a sweet fruit that makes a fine jelly.

Spanish moss (Tillandsia usneoides) is an epiphyte, or air plant, not a true moss. It often grows on cypress and oaks for support.

Wildflowers pop up in the dry, salty sand: sea purslane, sea oxeye daisies, sweetscent, coral bean, blanket flowers, dewberry, southern beeblossom, sea purslane, and even prickly pear cactus.

Sea purslane (Sesuvium portulacastrum) is highly salt tolerant and flourishes on the upper edges of salt marshes and coastal dunes. The holes visible above the blossom are fiddler crab homes.

Seaside oxeye daisies (Borrichia frutescens) are common in salt marshes and between mangrove swamps and coastal uplands.

Southern beeblossom (Gaura angustifolia) flowers open white at night and turn pink the following day.

Southern dewberry (Rubus trivialis) is a cousin to the blackberry. It grows on the ground instead of upright.

Native blankert flower (Gaillardia pulchella) prefers dry, sandy soil and tolerates salt well.

Prickly pears (Opuntia humifusa) are a major food source for gopher tortoises in the scrubland.

Sweetscent (Pluchea odorata) grows in salty habitats and attracts butterflies and bees.

Coral beans (Erythrina herbacea) attract hummingbirds and bees.)

Ospreys circle overhead, little blue herons hunt in the mangroves, flocks of ibis gobble tiny crustaceans at low tide in the bayou and pelicans lounge in the marshes. A southern black racer snake darts across the sand path. We spot skinks, anoles and marsh rabbits. My favorite sightings are the zebra longwing, gulf fritillaries and queen butterflies nectaring in the wildflowers. Here are a few other photos from recent walks in the salterns.

American white pelicans (Pelecanus erythrorhynchos) feed in a shallow wetland near the marshes. (Watercolor by my husband.)

A little blue heron (Egrella cerulea) hunts for fish, frogs and small crustaceans in the mangroves.

The zebra longwing (Heliconius charitonius) is Florida’s state butterfly.

The queen butterfly (Danaus gilippus), a cousin to the monarch, also depends solely on milkweed for its nutrition.

Gulf fritillaries (Agraulis vanillae) are active all year in south Florida.

saltmarshquiet

In the late afternoon, all is quiet. There is only the sun’s heat and the fullness of silence.

 

Awakening Spring

Winter hangs on stubbornly this year. Yet, in spite of lingering snow falls and temps hovering in the low 30s, the natural world slowly awakens. During the night I heard a flock of tundra swans call to each other as they migrated north. Robins carol and cardinals sing in the early morning darkness. Later in the day, dark-eyed juncos trill as they search the sunny exposed parts of our garden for last year’s seeds. The tiny birds have been daily visitors since October and soon will depart for their summer home in Canada.

Dark-eyed juncos (Junco hyemalis) will soon migrate to their breeding territories in Canada.

Ivory-petaled snowdrops are ready to bloom.The first Siberian squill bulbs poked through the cold, wet soil of our back garden at the same time as the tiny, sharp leaves of iris. Silver maple buds glow rosy and round in the late afternoon sunlight and the soft, furry catkins of quaking aspen have emerged.

A snowdrop (Galanthus nivalis) blossoms in a sunny spot beneath a spruce tree.

Quaking aspen (Populus tremuloides) flowers begin to emerge.

I want this slow showing of spring to speed up, but it should not be hurried. Soon enough I will want the season to slow down — it all happens in such a rush once it gains momentum in May, and hurdles toward blossoming, fruiting, and autumn once again. I have learned that, as with all of life’s special times, it is better to wait for, notice and welcome each change; to savor the whole unfolding of new life.

Crocus chrysanthus ‘ladykiller’ usually bloom in April.

My Mother’s Peonies

In my mind’s eye, I see a cobalt blue glass vase holding three white peonies. It sits on a white linen runner that contrasts with the dark wood of an old mahogany table. The heavy scent of peonies fills the small dining room that is illuminated by a south-facing picture window. A few black ants crawl in and out of the many-layered petals, though we tried to shake them off outside.

Mom’s simple bouquet’s were perfect.  Whether peonies, or other flowers, she fashioned a simple, understated arrangement of whatever bloomed in our back yard. I wish that I had photos of them, but only the memories remain — and they are mine alone. Mom does not remember much of the past because she has dementia. So, I tell her about the white peony bushes that grew at just the right height for me to breathe in their heavy perfume and stroke their silky petals. I speak of warm afternoons when I was very young and how we lingered in our garden to watch bees in the flowering almond, and looked to see if new seedlings had popped through the soil. I speak of the giant basswood tree that shaded the back yard and scented the evening air. Most importantly, I tell Mom how much I loved being with her in the garden.

This week, the first peony opened in my own back yard — white blooms first, then royal red and finally pink. I still touch their soft petals and smell their perfume. I remember with joy the days when I taught my own young son about nature, and I think of Mom with gratitude for all that she has given to me.

Virginia Bluebells

Virginia bluebells (Mertensia virginica) blossom throughout May in Minnesota.

Spring’s native wildflowers are delicate and fleeting — that’s why botanists refer to them as “ephemerals.” The Virginia bluebell, Mertensia virginica, is one of my favorites. The mature flowers are spring sky blue and usually bloom throughout May in Minnesota. Native to southeastern Minnesota and portions of the eastern United States and Canada, they are a woodland flower that requires moisture and partial-to-full shade.

Virginia bluebell’s early leaves are purple-tinged and the flower buds are pink to purplish.

The leaves first appear with purple highlights and then turn light green. The flower buds also are pink to purple. As the bell or trumpet-shaped flowers enlarge, they become sky blue and fade as they age. About one month after blooming, each fertilized flower produces three or four seeds. In June, the leaves will die back and the plant becomes dormant until the next spring — a typical characteristic of spring ephemerals. I usually place markers by my plants to avoid digging them up if I plant during the summer.

Virginia bluebells grow with tiny blue-flowered Siberian bugloss (Brunnera macrophylla “Jack Frost”), variegated Solomon’s seal (Polygonatum odoratum “Variegatum”), and sweet woodruff (Galium odoratum) in my small woodland garden.

Virginia bluebells provide an early source of nectar to bumble bees, honey bees and other species of bees and butterflies that are equipped with a long enough tongue to reach deep into the flower tube.  Want to learn more? Here are a couple of websites to visit for photos and information:

Friends of the Wildflower Garden and Minnesota Wildflowers

Blooming Crabs

Whatever crabapples lack in flavor, the trees make up for in year-round beauty. In early May, they scent the air with an aroma softer than lilacs or peonies. The blossoms range from bright white to pink to deep red. Many species show buds of one color and open to reveal a different hued blossom. The fruit or pomme varies in color, too, from deep red to orange and yellow. Many crabs hold their fruit through the winter, or until eaten by wildlife.

Why is such a lovely tree named a crab? Late Middle English crab or crabbe meant “fruit of the wild apple” possibly from the similar Swedish word, krabbäpple. It also connoted the sour or bitterness of the fruit. Though crabapples are bitter to the human palate, the fruit is an important source of nourishment to many mammals and birds during the winter. In the spring, native bees, such as orchard bees, collect pollen. Early butterflies drink the nectar and later in the season, the leaves provide food for caterpillars.

Scientists believe that all domestic apples originated in Kazakhstan’s mountains. But, there are three species of “wild,” or crabapples, indigenous to North America. Many others were brought here by immigrants from Europe and Asia. How does one distinguish between the two types of apples? A general rule is that wild apples (crabs) are two inches in circumference or smaller and domesticated apples are larger than two inches. Like common or domesticated apples, crabs are members of the rose family and belong to the genus ‘Malus’. Crabapple jelly is delicious if you don’t mind a little tartness! But whether or not you like the fruit, enjoy the beauty of their blossoms this spring!