This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
The habitat of this plant is moors or moorland bogs. The plant has the sedge habit. The root-stock is slender, creeping, with stolons. The stems are 3-angled, smooth, slender. There are 2 to 3 bristle-like leaves, not so long as the stem, which are rolled inwards. The plant is monoecious. The terminal flowers are male. There are no bracts. There are 3 stigmas. The glumes are 4-6, distant, oblong to lance-shaped, acute, pale, not so long as the fruit, which is spindle-shaped, pale, and beaked, yellowish-green. The nut is 3-angled, linear to oblong. The plant is 6-9 in. high, flowering in June and July, and is a herbaceous perennial.
The habitat of this plant is moist shady places, dry hedgebanks. It has been regarded as a sub-species of C. muricata. The stems are 3-sided, loose, curved, slender, limp, with rough angles above. The spikelets are distant, loose, drooping, the upper close, greyish, 1 or 2 of the lowest lengthened into a long branch. The bracts are bristle-like. The glumes are blunt, shorter than the fruit. The fruit is ovoid, acute, plano-convex, with a thick green margin, with obscure veins, divided into 2 nearly to the base, smooth, ascending. The beak is rough-edged. The nut is ovoid to oblong, flattened, the beak short. The plant is 1-2 ft. high. It flowers from May to July, and is a herbaceous perennial.
The habitat of this sedge is moors, bogs, and marshes. The habit is that of a sedge. The stem is 3-angled, more or less smooth or rough above, without stolons. The rootstock is densely tufted. The leaves are narrow, channelled, not so long as the stem. The 3-4 spikes are pale-green, round, distant, spreading. The bracts are small, usually at the bottom of the spikes. The glumes are green, with pale-brown sides, ovate, acute. The fruit is olive-green, stalkless, with a round base and stout lateral ribs. The nut is ovoid, narrow below, the glume not so long as the fruit. The plant is 4-12 in. in height, flowering from May to July, and is a herbaceous perennial.
The habitat of this plant is heaths and banks, woods and fields. It was first found between Tunbridge Wells and Eridge, Sussex, by Mr. Mitten. The plant has the sedge habit. The rootstock is stout and creeping, tufted. The root is fibrous. The plant is slender. The stems are slender, 3-sided, rigid, then curved, roughish above. The leaves are narrow, not so long as the stem, straight, or wavy. The fertile spikes (2-3) are ovate, stalk-less, close, reddish-brown. The male spikelets are stout, solitary. The female are few-flowered, slender. The glumes are broad, chestnut-brown, those of the fertile spikes blunt-notched. The bracts are membranous and small, the lowest awllike. The fruit is oblong, ovate, longer than the glumes. The nut is pale, and borne on a stalk. The plant is 6-15 in. in height, flowering in April and May, and is a herbaceous perennial.