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Scutellaria integrifolia (Helmet-flower)
Cressler, Alan

Scutellaria integrifolia

Scutellaria integrifolia L.

Helmet-flower, Rough Skullcap, Common Large Skullcap, Tall Skullcap

Lamiaceae (Mint Family)

Synonym(s): Scutellaria incana ssp. hispida, Scutellaria integrifolia var. hispida

USDA Symbol: SCIN2

USDA Native Status: L48 (N)

Scutellaria integrifolia grows 1-2 feet tall, is usually branched near the base and has erect stems. Leaves are opposite. Those near the bottom are often coarsely toothed, 1/3-1 1/4 inches long; upper leaves are untoothed, narrower, and up to 2 inches long. The bluish-lavender, 2-lipped flowers are clustered or solitary in the axils of bract-like upper leaves, together forming an elongated cluster along the finely hairy square stem.

The many different Skullcaps are recognized by the tiny projection, or hump, on the top of the calyx surrounding the base of the flower.


From the Image Gallery

21 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Opposite
Fruit Type: Nut
Size Notes: Grows 1-2 feet tall.
Fruit: Black nutlets.

Bloom Information

Bloom Color: White , Pink , Blue
Bloom Time: May , Jun , Jul


USA: AL , AR , CT , DC , DE , FL , GA , KY , LA , MA , MD , MO , MS , NC , NJ , NY , OH , OK , PA , SC , TN , TX , VA , WV
Native Distribution: New England and New York south to Florida; west to Alabama and Missouri; north to Kentucky and Ohio.
Native Habitat: Clearings, open woods.

Growing Conditions

Light Requirement: Sun
Soil Moisture: Wet

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Crosby Arboretum - Picayune, MS


Bibref 1620 - Gardening with Native Plants of the South (Reprint Edition) (2009) Wasowski, S. with A. Wasowski
Bibref 248 - Texas Wildflowers: A Field Guide (1984) Loughmiller, C. & L. Loughmiller

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Web Reference

Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Research Literature

Reslit 702 - Mycorrhizal fungi and growth and development of micropropagated Scutellaria integrifolia plants (2007) N. Joshee, S. R. Mentreddy and A. K. Yadav

This information was provided by the Florida WIldflower Foundation.
Search More Titles in Research Literature

Additional resources

USDA: Find Scutellaria integrifolia in USDA Plants
FNA: Find Scutellaria integrifolia in the Flora of North America (if available)
Google: Search Google for Scutellaria integrifolia


Record Modified: 2023-04-07
Research By: TWC Staff

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