The Ohio State University at Marion

June Blooms

Butterfly Milkweed

Asclepias tuberosa

Blooms June - September

Common Milkweed

Asclepias syriaca

Blooms June - August

Common Milkweed grows two-to-four feet tall and produces a profusion of sweet-scented mauve flowers clustered together in domed groups in mid-summer. Monarch caterpillars feast on the leaves, become butterflies and migrate to Mexico for the winter. The caterpillars ingest the toxic sap of the milkweed plants with no ill effects. The Monarch butterflies then have a toxic defense against predators like birds. The seed pods of Common Milkweed are gray and warty but when they break open they reveal seeds attached to silky fluffs which help carry the seeds on the wind.

Culver's Root

Veronicastrum virginicum

Blooms June - September 

Culver's Root features tiny white flowers in dense clusters on tapering spikes. The plant grows three-to-six feet tall. The fragrant blooms appear in July and August. The plant spreads by underground stems (rhizomes) and its leaves are long and pointed with sawtoothed edges.

False White Indigo

Baptisia leucantha

Blooms June - July 

False White Indigo looks more like a shrub than a typical prairie plant. It grows into a nice round bushy shape up to four feet tall and is nearly as wide. Towering above the foliage are spikes of creamy-white flowers. After the flowers fade, large dark seed pods appear, an indication of its membership to the legume family.

Lanceleaf Coreopsis

Coreopsis lanceolata

Blooms June - July 

Named after its lance shaped leaves, Lanceleaf Coreopsis produces brilliant yellow flowers from June to July. The daisy-like flowers have eight rays and flat center disks. This plant is sometimes called Lanceleaf Tickseed in reference to the seeds resemblance to ticks.

Michigan Lily

Lilium michiganense

Blooms June - July 

A rarity on the OSUM Prairie, finding a Michigan Lily is always a treat! Its impressive large showy orange petals grow off of a single stem attached to a bulb underground. Native Americans once gathered its bulbs and unopened flower buds for food.

Ohio Spiderwort

Tradescantia ohiensis

Blooms June - July 

The deep purple flowers of Ohio Spiderwort bloom during April and July. The flowers in the morning and close in the afternoon to conserve moisture. The simple flowers are made of three petals and six yellow anthers. The plants grow between two-to-three feet with long, thin and bladelike leaves.

Ox-Eyed Sunflower

Heliopsis helianthoides

Blooms June - September 

Ox-eye Sunflower can reach up to six feet tall and features bright yellow flowers from June to September. The daisy-like flowers have yellow-orange rays and yellow center disks. The leaves of Ox-eye are rough and feature serrated edges.

Rattlesnake Master

Eryngium yuccifolium

Blooms June - September 

The leaves of Rattlesnake Master look like Yucca but its actually a member of the Parsley Family. The distinctive, waxy-green foliage and the white “spiky golf ball” flowers that show up in July are truly unique. Native Americans brewed a tea of the root as an antidote to rattlesnake venom.

Smooth Petunia

Ruellia strepens

Blooms June - August 

Smooth Petunia typically grows to be one and a half to three feet tall. The rich, creamy liliac colored flowers are a delight to see thoughout May to July. Look closely to find the blooms as they hide right where the leaves meet the stem. The plants oval shaped leaves are oppositely arranged.

Smooth Rose

Rosa blanda

Blooms June - August 

Smooth Rose can grow up to seven feet tall and features male and female organs on the same flower. The native shrub typically blooms from May to June. Rose hips, the fruits of this shrub, contain high levels of Vitamin C.

Sullivant's Milkweed

Asclepias sullivantii

Blooms June - August 

Large and showy, the pink flowers of Sullivant's Milkweed appear in June and July. The clusters of flowers sit atop a two-to-five foot stem. The blooms attact many different types of butterflies. Seed pods are filled with dark brown seeds attached to silky parachutes to aide in distribution.


Oenothera pilosella

Blooms June - August 

The buds of Sundrops begin with a red hue, but open into a beautiful bright yellow flower in early summer. The four petaled flowers open during the day and close at night. The leaves have a bit of a waxy, shiny covering. The stems are slender and softly hairy. Sundrops grows between one-and-two feet tall.


Anemone virginiana

Blooms June - August 

Thimbleweed is a single stemmed plant that has two or three sets of whorled leaves. Like some members of the Buttercup family, its flower lacks petals and instead has large petal-like sepals. Its thimble-shaped seed heads turn cottony with many small seeds in autumn. The fluffy balls of seeds are a pleasure to collect.

Thin Leaved Coneflower

Rudbeckia triloba

Blooms June - October 

A small sunflower-like plant, often branching. Flower heads about 1-2 inches wide, with a central button of brown disk flowers and about 8 yellow to orange ray flowers. Leaves not opposite each other on the stem. Upper leaves lance-shaped, but at least some of the lower leaves with 3 lobes. Blooms in summer.

Wing Angled Loosestrife

Lythrum alatum

Bloom June - September 

Wing Angled Loosestrife's narrow spikes grow up to three feet tall. The lavender blooms appear in mid-summer and last up to two months. The tiny, dust-like seeds are too small to be eaten by birds, but can be carried long distances by the wind or water. This plant should not be confused with the aggressive invasive plant, Purple Loosestrife.


Achillea millefolium

Blooms June - August

Often confused with a type of fern due to its lacy leaves, this plant grows in large clusters due to the horizontal underground stem (rhizome). Yarrow has white to pink blooms which forms a flat-topped cluster. Blooms appear from May through June. This plant is quite short at only one-to-three feet tall.