Great Sundew

Drosera anglica is a perennial herb which forms an upright, stemless rosette of generally linear-spatulate leaves. As is typical for sundews, the laminae are densely covered with stalked reddish colored mucilaginous glands, each tipped with a clear droplet of a viscous fluid used for trapping insects. The lamina, which is 15–35 millimetres (0.59–1.38 in) long, is held semi-erect by a long petiole, bringing the total leaf size to 30–95 millimetres (1.2–3.7 in). Plants are green, coloring red in bright light. In all populations except those in Kauaʻi, D. anglica forms winter resting buds called hibernacula. These consist of a knot of tightly curled leaves at ground level, which unfurl in spring at the end of the dormancy period. The root system is weak and penetrates only a few centimeters, serving mainly as an anchor and for water absorption. Nitrogen is in short supply in bogs and trapping and digesting insects provides an alternate source. Drosera anglica flowers in the summer, sending up peduncles 6–18 centimetres (2.4–7.1 in). long bearing several white flowers which open individually. Like other sundews, the flowers have five sepals, petals, and stamens with three styles. The petals for this species are 8–12 mm (¼ to ½") long, and the flowers have branched 2-lobed styles. …

Drosera anglica grows in open, non-forested habitat with wet, often calcium-rich soils. These include bogs, marl fens, quaking bogs, cobble shores, and other calcareous habitats. This tolerance of calcium is relatively rare in the rest of the genus. D. anglica is often associated with various sphagnum mosses, and many times grows in a soil substrate that is entirely composed of living, dead, or decomposed sphagnum. The sphagnum wicks moisture to the surface while simultaneously acidifying it. What soil nutrients are not seeped away by the constant moisture are often used up by the sphagnum or made unavailable by the low soil pH. Since nutrient availability is low, competition from other plants is diminished, allowing the carnivorous English sundew to flourish.

Drosera anglica was first described by William Hudson in 1778. It has frequently been confused with the other circumpolar long-leaf Drosera, D. intermedia. This confusion was fueled by the resurfacing of an older name, D. longifolia (described by Carl Linnaeus in 1753), which was regarded as being too ambiguous in description and had been applied to specimens of both D. anglica and D. intermedia. Herbarium specimens were also a mix of the two species. These points led Martin Cheek to propose D. longifolia for rejection as a species name in 1998. The proposal was accepted and the taxon listed as rejected in 1999.