Vascular Plants of North Carolina
Account for Hoary Skullcap - Scutellaria incana   Biehler
Members of Lamiaceae:
Members of Scutellaria with account distribution info or public map:
Google Images
Section 6 » Order Lamiales » Family Lamiaceae
AuthorBiehler
DistributionRanges over most of the Mountains and northeastern half of the Piedmont, with a disjunct record for Brunswick County. An odd lack of records for the northwestern Piedmont and northern Mountains, which must be somewhat real owing to varietal differences (see Taxonomic Comments).

This species has an Eastern range, but with an odd distribution. It ranges from southwestern NY and MO, south to GA and LA, but it is oddly scarce in MD, VA, and also into northwestern NC.
AbundanceFrequent to common in the central and southern Mountains and adjacent southwestern Piedmont. Infrequent in the north-central and northeastern Piedmont, but very rare between there and the Mountains. Casual in Brunswick County, the only Coastal Plain records. The var. australis is Significantly Rare, as listed by the NCNHP.
HabitatThis is a species of shaded to partly shaded mesic hardwood forests, not in overly dry or rocky sites nor normally in bottomlands or overly rich sites. Thus, it is a species of Mesic Mixed Hardwood Forests, Acidic Cove Forests, and various oak-dominated forests, as well as stream banks, wooded margins, and roadbanks. The Brunswick County habitat is/was likely in dry, sandy open woods, as it represents a different variety from that elsewhere in the state.
PhenologyBlooms from late June to early September, later than most similar skullcap species (that are normally finished by late June); fruits soon after flowering.
IdentificationThis is a rather tall herb, especially for a skullcap, growing as a single stem to about 2-3 feet tall. It has a handful of paired (opposite) leaves, each pair often at right angles to the ones above and below, with rather long petioles often 1-inch long. The leaf blades are mostly widely elliptic, rounded to cuneate at the base and toward the tip, about 3-4 inches long and half as wide. This species is distinguish by its many (often 5 or more) fairly long racemes of flowers from some of the upper leaf axils and tip of the stem, each one containing 10-20 or more flowers. Each blue to lavender-blue flower is about 4/5-inch long, and thus when in full bloom there are often 30-50 or more flowers in bloom on a number of racemes, forming a pyramid shape. S. serrata is a shorter plant and has generally just a solitary raceme at the end of the branch, and S. ovata has heart-shaped/cordate leaves, normally quite hairy as well. You should not have trouble finding this showy species in the southern and central mountains and adjacent Piedmont foothills, though in the northeastern Piedmont it make take much more effort to find, though not a rare species there.
Taxonomic CommentsWeakley (2018) lists three varieties as occurring in NC, thus accounting for the odd state distribution. The nominate var. incana is likely the main one in the northeastern and north-central Piedmont, rare in the mountains; the var. punctata is presumably the one found in the central and southern mountains and adjacent Piedmont; and var. australis is a southern taxon ranging north to Brunswick County.

Other Common Name(s)Downy Skullcap
State RankS4
Global RankG5
State Status
US Status
USACE-agcp
USACE-emp
County Map - click on a county to view source of record.
Select a source
AllHerbaria
Individual
Website
Select an occurrence type
AllCollection_naturalSight_natural