We must here mention the Butterwort (Pinguicula) as a summer-flowering plant of marshy places; but this is a carnivorous species; and as such is described, together with other plants of similar habits, in [Chapter XXIV].
In most parts of Britain we may meet with the pretty little Bog Pimpernel (Anagallis tenella) of the Primulaceæ. It is a delicate, creeping plant (see [Plate V], Fig. 7), only about three or four inches long, with a slender, decumbent stem; and very small, opposite, rounded leaves on short stalks. Its flowers are funnel-shaped, of a pale pink colour, on long, slender, erect, axillary peduncles. The calyx is cut into five pointed lobes; and the corolla is deeply cleft into five segments which are much longer than the calyx. The fruit is a globular capsule that splits transversely into two hemispheres, like that of the Scarlet Pimpernel.
Ditches are frequently quite overgrown with the Water Pepper or Biting Persicaria (Polygonum Hydropiper), which is very much like the Spotted Persicaria (p. [205]) of the same order (Polygonaceæ), but is much more slender, is creeping and rooting at the base, and more or less biting to the taste. Its stem is freely branched, from one to three feet high; its leaves narrow and wavy, with membranous stipules much fringed at the top; and the little pinkish-green flowers are in slender, drooping, interrupted spikes, leafy at the base.
Of the Orchidaceæ we shall note here but one species—the Marsh Helleborine (Epipactis palustris), which is widely distributed, and really abundant in places, flowering during July and August. It is very much like the Broad-leaved Helleborine described on p. [308], and represented on [Plate II], but is not so tall, being only about a foot high, and its leaves are narrow. The flowers, too, are fewer than in the Broad-leaved Helleborine, and the raceme is not one-sided. The sepals are narrow, of a pale green colour, striped with red or purple; and the petals are white, striped with red at the base. The lower lobe of the lip is blunt and thick; and the bracts are shorter than the flowers.
Rushes and Sedges are so abundant in marshes and other wet places that they form quite a characteristic feature of these localities; and the number of common species is so large that we must necessarily confine our attention to a very small proportion.
The Rushes, which constitute the order Juncaceæ, are stiff, smooth plants, often of such social habits that they cover large patches of wet or watery soil. Their stems are usually erect, and seldom branched; and their stiff, smooth leaves are frequently cylindrical, like the stems, with a soft, pith-like tissue within, but occasionally flat and narrow like those of grasses. The flowers are perfect, with a regular, inferior perianth of six dry segments; and they have generally six stamens, a three-celled ovary, and three slender stigmas. They are very small, either separate or in clusters; and each flower or cluster has a dry, sheathing bract at its base.
The Bog Ashphodel.
The pretty little Bog Asphodel (Narthecium ossifragum) shall first receive our attention because botanists are not yet in agreement as to its correct position among the monocotyledonous plants. It is certainly allied to the rushes, but on account of its larger and more succulent flowers it is often included among the lilies. It has a creeping rootstock, and stiff, erect stems from six to ten inches high. Its bright yellow, starlike flowers form a stiff, terminal raceme, with a bract at the base, and another one above the middle of each pedicel. The segments of the perianth are about a third of an inch long, yellow above and greenish below. The stamens are a little shorter than the perianth segments; and their filaments are clothed with white woolly hairs. This plant is common on wet moors and in mountain bogs, flowering from June to August.