Rose of Sharon (also known as Althea or Korean Rose)
Kingdom: Plantae, Division: Angiosperms, Class: Eudicots, Order: Malvales, Family: Malvaceae, Genus: Hibiscus, Species: Hibiscus syriacus · Malvaceae (Mallow family) · Simple, Deciduous
Species
Hibiscus syriacus
Leaf Type
Simple, Deciduous
Family
Malvaceae (Mallow family)
Shape
Diamond-shaped to ovate, typically featuring three distinct lobes although this specific specimen shows a more slender, less deeply lobed morphology.
Size
Approximately 2-3 inches in length; this size is standard for the species which typically ranges from 2 to 4 inches.
Margin
Serrate (coarsely toothed) to crenate; the margins are notably jagged or scalloped.
Arrangement
Alternate
Rarity
Very Common; a staple ornamental shrub in temperate zones worldwide.
Color & Pattern
Medium to dark green on the upper surface; the color is uniform throughout this specimen without variegation. The underside is typically a slightly lighter green.
Venation Pattern
Palmate-pinnate hybrid; typically three main veins radiate from the base, branching into a pinnate network.
Texture & Surface
Smooth (glabrous) to slightly leathery; the surface appears matte to semi-glossy and lacks significant hairiness.
Description
This leaf belongs to a hardy deciduous shrub known for its large, trumpet-shaped flowers. The plant usually grows in an upright, vase-shaped habit reaching 8-12 feet. The bark is light gray and smooth, becoming slightly rougher with age. It is renowned for blooming in mid-to-late summer when few other shrubs are in flower.
Key Features
Three-lobed shape (often resembling a maple leaf but more elongated), coarsely toothed margins, and a distinct pale green petiole. The flowers featuring a prominent central stamen column are the definitive ID trait.
Habitat
Prefer full sun to partial shade; adaptable to various soil types but thrives in moist, well-drained, slightly acidic soil. Often found in temperate gardens and landscapes.
Geographic Range
Native to south-central and east Asia (specifically China and Korea), but widely naturalized and cultivated across North America and Europe.
Condition Notes
The leaf appears to be in Good condition, though it is detached from the petiole. There are minor irregular tears at the base and tip, possibly from manual removal or slight insect herbivory. No signs of chlorosis or fungal rust are visible.
Interesting Facts
It is the national flower of South Korea (Mugunghwa), appearing on national emblems. The name 'Rose of Sharon' originally appeared in the Bible (Song of Solomon), though that likely referred to a different plant entirely.
Medicinal & Uses
Primarily used as an ornamental landscaping plant. In traditional medicine, flower extracts have been used for their diuretic and emollient properties. The petals are technically edible and can be used in teas or salads.
Ecological Role
Provides a vital late-season nectar source for pollinators like bees, butterflies, and hummingbirds. In some regions of the US, it is considered mildly invasive due to prolific seeding.
Similar Species
Hibiscus rosa-sinensis (Tropical Hibiscus) which has glossier, darker leaves and is not cold-hardy; also Acer ginnala (Amur Maple) which has similar lobing but opposite leaf arrangement.
Foraging Tips
Look for this shrub in late summer; the large hibiscus flowers (white, pink, or purple with a red eye) make it unmistakable. Check for alternate leaf arrangement on woody stems to distinguish it from maples.
Toxicity Warning
Generally considered Non-toxic to humans; however, the ASPCA lists Hibiscus as non-toxic to dogs and cats, though ingestion of large quantities may cause mild gastrointestinal upset.