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.
Pearl Everlasting (Antennaria (Anaphalis) margaritacea, C. B. Clarke). - The habitat of this plant is stream-sides. The plant has more or less the shrub habit. The stem is erect, stout, cottony, branched above, leafy. The leaves are linear to lance-shaped, acute, clothed with white and buff cottony down, more so below, and are alternate, stalkless, half-clasping. The flowers are yellow or brownish-white, the heads of the male florets rounded, those of the female bell-shaped, borne in a compound corymb. The involucre is white. The involucral bracts are oblong, brown below, white above, and radiating. The plant is 2-3 ft. in height, and flowers in July and August, being a herbaceous perennial.
The habitat of this plant is damp places, especially on light soils, wet sandy places, moist places generally. The habit is erect. The whole plant is cottony above, rarely hairless. The stems are numerous, erect, prostrate below, or ascending, much-branched. The leaves are narrow, linear to lance-shaped, swollen upwards, acute or blunt, cottony both sides, and the leaf-stalk does not clasp the stem. The flowerheads are yellowish-brown, collected in terminal, dense clusters, not so long as the leaves, at the end of the stem and branches. The involucre is yellowish-brown, the bracts narrow, more or less acute. The achenes are very small and smooth. The plant is 2-6 in. in height, flowering between July and September, and is a herbaceous annual.
The habitat of this plant is watery places. The plant is erect in habit. The stems are stout, succulent, round in section, branched above, leafy, with opposite branches. The leaves are in pairs, united below, stalkless, entire, oblong to lance-shaped, coarsely toothed. The flowerheads are drooping, solitary, terminal. The flower - stalks bear no bracts. The outer phyllaries are spreading, or turned back, leafy, the inner not so long, broadly oblong, blunt, with black streaks. The florets are brownish-yellow. There are few ray florets, which are broad, or wanting. The fruit is wedge-shaped, with 3-4 bristles, narrow to inversely ovoid. The pappus bristles are barbed. The plant is 1-2 feet high, and flowers from July to October, being a herbaceous perennial.
The habitat of this plant is river-sides, moist meadows, watery places. The plant is erect in habit. The rootstock, which is creeping, bears stolons. The stem is solid, stout, erect, leafy, smooth. The leaves are smooth, linear to oblong, stalkless, acute, irregularly toothed, the lower leaves being shortly-stalked, the lowest half-clasping and auricled. The flowerheads are numerous, in loose, terminal, downy corymbs, with a short flower-stalk, bearing bracts. The involucre is broadly bell-shaped, the outer phyllaries awl-like, the inner linear-oblong, with brown tips. There are few (6-7) ray florets. The florets are yellow. The fruit is smooth. The plant attains a height of 3-5 feet. It flowers in July and August, and is a herbaceous perennial.