Drosera linearis (Linear-leaved Sundew) - photos and description

Drosera linearis

Drosera linearis

Drosera linearis

Drosera linearis

Drosera linearis

Drosera linearis

Drosera linearis

General: Tiny insectivorous plant, leaves growing from a central rosette.

Flowers: Small white flowers in cymes born on a leafless scape. Flowers measured to 10 mm in diameter.

The plants eat small insects to provide them with the nitrogen which is lacking where it lives. When an insect becomes entangled in the hairs, the leaves bend inwards so that the insect comes into contact with fine, inner hairs. Enzymes are produced by the hairs which dissolve the insect which is then absorbed by the leaf. Only the insect's exoskeleton remains which blows away when the leaf hairs uncurl to become erect again, ready for the next meal.

Leaves: Leaves linear, the longest leaf blade I could find was measured at 55 mm long and 2 mm wide. Each leaf with glandular hairs, the hairs exuding a sticky drop at their tip.

Height: Height listed in Budd's Flora to 10 cm, I measured scapes to 10 cm high.

Habitat: Very wet pitcher plant bogs in the boreal forest, often on the edges of small muddy pools.

Abundance: Extremely rare, ranked as an S1 by the Saskatchewan Conservation Data Centre.

Origin: Native.

Similar species: There are 3 species of Drosera native to the province, they can be distinguished by the shape of their leaves:

- Drosera rotundifolia has leaves that are more or less orbicular, this plant is common.

- Drosera anglica has leaves that are oblong, this plant is rare.

- Drosera linearis has leaves that are linear, this plant is extremely rare.

When and where photographed: Photos taken June 24, and July 13th, very wet bog, boreal forest, 400 km north east of our home in Regina, SK.