Physostegia ledinghamii (False Dragonhead) - photos and description

Physostegia ledinghamii

Physostegia ledinghamii

Physostegia ledinghamii

Physostegia ledinghamii
15 cm ruler for scale

Physostegia ledinghamii

General: Upright rhizomatous perennial, usually with single stems. Stems are glabrous and four-angled.

Flowers: Inflorescence in spikes, terminal on stem and from leaf axils. Flowers are pink, two-lipped, the lower lip with two lobes, tube-shaped, flowers opposite on spikes. We measured flowers to 20 mm long.

Leaves: Leaves are cauline, opposite, sessile, lanceolate, serrate. A large leaf was measured at 13 cm long and 3.5 cm wide. Leaves with tiny hairs on the top, and glabrous on the bottom.

Height: Height listed in Budd's Flora to 100 cm, we measured plants to 80 cm tall.

Habitat: Stream banks, moist woods, we've seen them growing in both sun and shade.

Abundance: Fairly common.

Origin: Native.

Similar species: There is one other species of Physostegia native to our province, P. parviflora, which can be distinguished by its uppermost leaves which are broadest near the broadly rounded base, and a corolla usually less than 1.5 cm long (as described in The Flora of Canada).

When and where photographed: The above photos were taken August 5th along the Red Deer River, 400 km north east of our home in Regina, SK.