Scutellaria canescens is a species of skullcap in the mint family Lamiaceae, distinguished by the helmet- or shield-shaped calyx that gives the group its common name. It carries the characteristic square stems, opposite leaves and two-lipped flowers of the genus Scutellaria. Flowering occurs in the UK from June to September. The calyx often remains noticeable after petals fall, providing late-season structure.

Scutellaria canescens (skullcap) flowers June to September and has the helmet-shaped calyx characteristic of skullcaps.

Scutellaria is a genus of flowering plants in the mint family, Lamiaceae. They are known commonly as skullcaps.

Scutellaria canescens

Skullcap (Scutellaria canescens) | Summer-flowering

Scutellaria incana, the hoary skullcap or downy skullcap, is a species of perennial flowering plant in the mint family Lamiaceae. It is native to North America and is primarily found in the eastern United States as well as some parts of the Midwest.

Scutellaria incana, or hoary skullcap, is a hardy perennial suited to full sun or partial shade, ideal for wildlife gardens and pond edges.

https://en.wikipedia.org/wiki/Scutellaria_incana

Scutellaria incana

Scutellaria lateriflora, (commonly "blue skullcap", "mad dog skullcap", "American skullcap", "side-flowering skullcap", etc.) is a hardy perennial herb of the mint family, Lamiaceae, native to North America. It has an upright habit, growing 60–80 cm (24–31 inches) in maximum height. It is a wetland-loving species and grows near marshes, meadows, and other wet habitats. The blue flowers are just under 1 cm (0.4 inches) long. In the garden it prefers full sun and loam soil. In UK gardens it is hardy through an average UK winter (RHS H4). Suggested uses include border, cottage garden and wildlife garden. It tolerates neutral soils, well-drained conditions and south-facing aspects.

Mad Dog Skullcap (Scutellaria lateriflora) is a member of the diverse Scutellaria genus, which features plants known for their opposite leaf arrangements and tubular, two-lipped flowers. Often referred to as blue pimpernel, mad dog weed, or Virginian skullcap, this species is part of the mint family (Lamiaceae) and has a rich history of use in traditional herbal medicine.

https://en.wikipedia.org/wiki/Scutellaria_lateriflora

Scutellaria lateriflora

Scutellaria orientalis, also known as yellow-flowered skull cap or yellow helmet flower, is a species of alpine rhizomatous perennial belonging to the genus Scutellaria, and classified under the family Lamiaceae.

Scutellaria orientalis subsp. pectinata is a hardy alpine perennial with yellow flowers, ideal for borders and wildlife gardens in full sun.