by The Prairie Enthusiasts | Oct 23, 2021 | Identification & Education
The baffling goldenrods swim in that giant taxonomic pool of asters, sunflowers, and thistles (Asteraceae). Their tiny, sun-emitting yellow-orange flowers are aggregated into marvelous “inflorescences” that appear to the uninitiated as single large blooms, whose growth forms are variously described as feather dusters, candles, or flattops. They are beloved by late summer insects, especially bees, and people with bee binoculars. Identification practice makes perfect.
There are too many for one article; I present a few that I have photos for.
(Photos and article by Rob Baller)
Early goldenrod (Solidago juncea)
Mid-August. Knee high on a tall person. Forming colonies whose flowering stalks are spaced closely enough to touch each other. Inflorescence a wide-open feather duster, spreading all directions, often slightly leaning and asymmetric. Stems and leaves totally smooth. Leaves tending to be similar size on the stem, but in fact reducing upwards. Mesic to dry prairie.
(Photo: Early goldenrod (Solidago juncea)
Missouri goldenrod (Solidago missouriensis)
Late August. Knee high. Forming colonies, whose blooming stalks are scattered too widely to touch each other, with many non-flowering stalks in between, giving the impression it’s just not a good year for blooming. Inflorescence a feather duster, typically but not guaranteed narrower than S. juncea. Stems and leaves totally smooth. Leaves largest at the base, clearly reducing upwards. Dry prairie, often sand.
(Photo: Missouri goldenrod (Solidago missouriensis))
Elm-leaved goldenrod (Solidago ulmifolia)
Late August. Waist-high. Inflorescence like a fireworks display, shooting slender wands of gold in several directions, often from upper leaf axils, the flowers born on the upper rim of the curve. Lower leaves broad and toothed like elm leaves. Mesic to dry, prefers light shade, oak savanna.
(Photo: Elm-leaved goldenrod (Solidago ulmifolia))
Canada goldenrod (Solidago canadensis)
Late August. Waist high or more. Forming colonies, sometimes covering fields. Inflorescence a flower duster whose overall outline is an asymmetric pyramid, leaning or arching to one side. Stems and leaves finely hairy, mostly toward the top of the plant. Mesic open sunny fields, prairie. Widespread volunteer; never planted on purpose.
(Photo: Canada goldenrod (Solidago canadensis))
Zigzag goldenrod (Solidago flexicaulis)
Late August. Waist high. Inflorescence presented in elegant marble-sized globs emerging from the upper-stem leaf axils, giving the stem and blooms a subtle zigzag appearance, which I find difficult to perceive. Lower leaves oval, toothed, with petioles tapering or ‘winged’ to the stalk. Mesic to dry, shady places, oak savanna.
(Photo: Zigzag goldenrod (Solidago flexicaulis))
by The Prairie Enthusiasts | Sep 23, 2021 | Identification & Education
Here are the four Liatris species most likely to be seen on our beloved Wisconsin prairie remnants. All are members of the sunflower family (Asteraceae). All have tiny pink to magenta flowers bundled into ‘floral cups’, with outer bracts on those cups that form layers like shingles, and positively identify the species. Good eyesight is helpful. All species bloom from the bottom upwards. They are discussed here in their order of seasonal blooming.
Dwarf blazing star (Liatris cylindracea)
Late July or early August. Shorter than knee high. Flower bundles loosely alternating up the stems, each bundle waving on a brief stalk more or less as long as the flower cup itself. Floral bracts are rounded like fingernails, with sharp points on each, adhering to the cup and never lifting away. Dry limey prairie.
Prairie blazing star (Liatris pycnostachya) aka ‘gayfeather’
Late July or early August. Knee to waist high. Flowers bundles spaced tightly on the stalk, the whole appearing like a rosy, feathery cattail. Floral bracts triangular, pointed, peeling away. Wet prairie, sometimes mixed into wetlands denoting where the ground is solid enough to stand on.
Rough blazing star (Liatris aspera)
Mid to late August, early September. Knee to waist high. No stalks connecting flower bundles to the main stem (sessile). Floral bracts distinctly rounded and cupping, creating a 3-D texture. Dry mesic to dry prairie, often in sand.
Showy blazing star (Liatris ligulistylis)
In my experience the least common of these. Mid to late August. Waist high. Very similar to L. aspera, except lower flower bundles are born on stalks about as long as the flowers. Mesic to dry prairie. Champion butterfly attractor.
by The Prairie Enthusiasts | Jul 14, 2021 | Identification & Education
Very often in the world of prairie restoration, there are differences of opinion on the ‘best’ way to improve a piece of land. After receiving the question below, Dan Carter wrote a reply that we felt would be helpful to share with everyone.
QUESTION from a TPE member
Just wondering what protection measures you implement in removing wild parsnips to protect the black swallowtail butterfly caterpillar. Parsnips is one of their select host plant. I’ve been finding caterpillars on parsnips for years. I know it is a horrible plant, but we also need to be careful not to destroy a species.
ANSWER from Dan Carter
You raise the conundrum that is really at the center of everything that happens with land stewardship. Everything we do to the benefit of one species, community, or ecosystem has reciprocal consequences for others that must be weighed against one-another.
Chapters and members have a very broad range of goals and approaches for the properties they care for, so I don’t presume to speak for them—and I don’t know if anyone is doing anything specifically to protect black swallowtail caterpillars as they control invasive species, but I don’t think people generally are. The best I can do is give you my take.
Generally, there should be a plan and/or goals in place that any conservation action that takes place serves. In other words, it wouldn’t make sense to eradicate parsnip just for the sake of doing so. Where The Prairie Enthusiasts are concerned, eradicating parsnip most often serves two separate goals. One is to establish or restore the diverse native vegetation associated with now-imperiled natural community types that in turn supports a broader diversity other life forms (invertebrates, vertebrates, fungi)—particularly those dependent on vanishingly rare prairies, savannas, or other fire-dependent natural communities. Parsnip infestations impede doing so. The goal of establishing or restoring a diverse prairie calls for a different set of actions and priorities than the goal of promoting one or a few plant, insect, or other animal species.
The other goal is to raise awareness of prairies and their value among the public, and the particular hazard parsnip poses to people in the course of their interaction with nature can impede that goal. In my view the most compelling argument for prairie conservation is the beauty of its flora and fauna, because the people whose imaginations are captured by that beauty are among the prairie’s most loyal advocates.
In most instances, the flora being encouraged through the eradication of parsnip will be more diverse and support a broader diversity of insects and other wildlife, including black swallowtails, because members of the carrot family are part of the native prairie, savanna, oak woodland, and sedge meadow communities we are often working towards restoring or reconstructing. Black swallowtail as a species benefits from using a broad range of native and exotic carrot family plants across the landscape (gardens, old fields, degraded woodlands, and high quality remnant natural communities), so it is able to maintain populations on or readily recolonize areas where exotic carrot family plants like parsnip, poison hemlock, and wild chervil have been removed. For instance, I eliminated parsnip and Queen Anne’s lace from our property early on, but we still have a good population of black swallowtail, because we have seven other native members of the carrot family native to prairies and savannas. Black swallowtail remained present on the surrounding landscape where its weedy or invasive host plants were still present and was able to recolonize—but now we now have a lot of other plant and insect species that we did not have before…and our children can romp around in it without fear of severe blisters. Native species I’ve observed black swallowtail larvae on include (but aren’t limited to) golden Alexanders, smooth meadow parsnip (Thaspium trifoliatum), yellow pimpernel, honewort, anise-root, sweet cicely, common water-hemlock, angelica, and black snakeroot (several species).
It would probably be possible to move caterpillars off of parsnip to other host plants, but oftentimes caterpillars won’t do as well if they are moved between species during their development. Doing this would also likely not be practical for larger infestations. …but in the case of black swallowtail, the local population will be fine so long as other host plants remain present, because just about all of the landscape outside of mowed lawn, paved areas, and cultivated fields still supports host plants, and black swallowtails disperse well, so the sites we might manage by eliminating parsnip generally already support other host plants, or they will.
I realize this may not get to the heart of your concern about the caterpillars on the parsnip, but concerns like yours either are or should be taken to account in the work that we do alongside all of the other factors that must be weighed in the course of good land stewardship.
Dan Carter, PhD
Landowner Services Coordinator
The Prairie Enthusiasts
by The Prairie Enthusiasts | Jun 22, 2021 | Identification & Education
Botanist and early TPE member Rob Baller created this series for our friends at Blue Mounds Area Project. The “blue sky” technique is Rob’s favorite for taking stunning plant photographs. Let him know what you think at robertballer@outlook.com.
ALWAYS get permission from the property owner if you want to try this technique.
Yellow umbels (Zizia spp., Taenidia integerrima, Pastinaca sativa)
These four yellow umbel (flowers arranged on branches like umbrella spines) plants bloom in June with their lofted blooms and deeply cut or divided leaves showing their relation to carrots and parsley. All grow in full sun to open oak woods, dry to moist.
Common golden-Alexander (Zizia aurea): Knee-high. Leaves divided nearly all the way to their junction into 3-5 leaflets. Leaf margins always toothed. Moist to dry soil, usually full sun. Early June.
Zizia aurea. Photo by Rob Baller
Heart-leaved golden-Alexander (Zizia aptera): Knee-high. Leaves on stem resemble those of the common Alexanders, but leaves at the base are distinctly heart-shaped, finely toothed and often bordered with an intense dark red (but not always). Tends to grow in medium to dry soil, bright sun. Early June.
Zizia aptera. Photo by Rob Baller
Yellow pimpernel (Taenidia integerrima): Knee- to waist-high. Tender leaves divided into 3-5 leaflets, usually with no teeth on margins. Flowers borne on long, well-spaced wires, giving a loose and almost spherical look. Prefers oak savanna, partial shade, and dry to medium soil. Early June.
Yellow pimpernel. Photo by Rob Baller
Wild parsnip (Pastinaca sativa): Invasive. Waist- to head- high. Stems with vertically running ridges. Lower foliage a ladder-like arrangement of 5-9 separate leaflets; upper leaflets in groups of 3-5. Always toothed. Umbels form a more flat-topped appearance than any of the preceding species. Full sun, moist to dry. A close relative of the domestic garden parsnip, this non-native pest contains clear sap that causes blisters on the skin about 2 days after contact. The quest to control this plant inspired the creation of the Parsnip Predator, offered for sale by TPE.
Look out! Photo by Rob Baller
Angelica (Angelica atropurpurea) and cow-parsnip (Heracleum maximum)
Two towering relatives in the carrot family. Both reside in damp, springy places and become man-high with baseball-sized clusters of flowers presented in umbels. Both bloom in early June.
Angelica (Angelica atropurpurea): Tends to be the first to bloom. Taller than Rob. Flowers are grouped into spheres, whose sub-groupings of tiny flowers form yet smaller spheres. Flowers greenish-white to purple. Stems dark purple and smooth. Prefers squishy wetlands; if you’re next to it, you’re in water up to your ankles. Full sun.
Angelica. Photo by Rob Baller
Cow-parsnip (Heracleum maximum, formerly H. lanatum): Taller than Rob. Flowers form an arched to nearly flat-topped umbel, always milky-white, the whole of it having a woolly appearance (giving its former name, “lanate”). Stems with soft, close hairs. Prefers rich, damp ground, usually not so squishy and often in areas of partial shade, like mesic oak savanna.
Cow-parsnip (moo). Photo by Rob Baller
Orchard grass (Dactylis glomerata) and reed canary grass (Phalaris arundinacea)
Two non-native grasses, abundant on roadsides and in grassy fields. Farmers plant them; restorationists try to control them because they are non-native and aggressive. Naturalists frequently rush to the ligule (a small, translucent membrane where the leaf separates from the stem) for identification, but these are often torn and distorted. I turn to the infinitely easier flowering architecture.
The flowering structures of both species are borne on slender wires at the top of the grass. The outlines they form can be distinguished at a distance. The only difficulty is that while reed canary spreads its flowering heads open widely during flowering, the heads may contract a week later, altering their appearance.
Orchard grass (Dactylis glomerata): First of the two grasses to rise in the field, and to flower, usually in late May. Knee- to waist-high. When in flower, the grass typically has just one outward-branching “limb” followed by a distinct space, then a few other “branches” with flowers. An outline drawn around all of the flowering structures at top of the stem would be almost as wide as it is tall.
Orchard grass is planted for forage and hay. It grows best on mesic soils. Often found persisting in fields planted to prairie, it is of low concern because fire and competition will lessen it over time.
Orchard grass. Photo by Rob Baller
Reed canary grass (Phalaris arundinacea): Second to rise and bloom, usually about a week after orchard grass (early June). Waist- to head-high, but reclining later in the summer. The flowering heads have many (8-14) branching wires more or less of similar length, appearing to form a ladder that gradually closes to a point as you follow it upward. An outline drawn around all of the flowers looks like a spearhead. The heads are widest during blooming, after which they contract to a tapered spear outline for the rest of the season.
Reed canary is routinely planted agriculturally on any damp soil. Spreads aggressively, voluntarily, anywhere silt is deposited, especially along stream banks and in any formerly tilled, sunny, floodplain. Reed canary is a high concern to restorationists and is hard to eradicate.
Reed canary grass. Photo by Rob Baller