104 
WILD FLOWERS OF THE BRITISH ISLES 
Epilobium Lamyi, F. Schultz. Another similar plant to the Square-stalked Willow- 
herb, with larger flowers and shortly-stalked leaves, which are shining and of a darker 
green. 
Very rare. Damp places. June — July. Perennial. 
Narrow-leaved Marsh Willow-herb. (Epilobium palustre, Linn.) — Flowers small 
and pale pink ; the petals notched, and the stigmas club-shaped ; the buds drooping. [As 
described in the genus Epilobium.] The stem 6-18 inches high, round, with thick curled 
hairs ; the leaves narrowly lance- or egg-shaped, toothed, and stalkless. 
Common. Bogs and wet places. July — August. Perennial. 
Chickweed-leaved Willow-herb. (Epilobium alsinefolium, Vill.) — ‘ The flowers 
J inch across, few, bright rose-colour, with notched petals, club-shaped stigmas, and droop- 
ing buds ; the stems 3 inches to 1 foot long, thick, brittle, with 2 lines of downy hairs, 
growing in dense masses ; the leaves egg-shaped (ovate), pointed, toothed, stalked, smooth, 
shining, mostly opposite. 
Rare. By mountain streams and springs. July — September. Perennial. 
Alpine Willow-herb. (Epilobium anagallidifolium, Lam.) — Flowers very small, 
inch across, pale rose-colour, few, often solitary, drooping in bud ; the 4 sepals nearly as long as 
the 4 notched petals; the stigmas club-shaped; the stems 2-5 inches high, much branched at 
the base and smooth ; the leaves mostly opposite, small, egg- or lance-shaped, blunt, stalked, and 
slightly hairy. 
Rare. By mountain streams and springs. July — August. Perennial. 
ISNARDIA. (LUDWIGIA, LINN.) — Flowers small, yellow or purple, solitary in the axils of the 
upper leaves. Sepals 4, united, separating into 4 teeth ; petals 4 or o; stamens 4 ; carpels 4, 
uniting into a 4-celled seedcase (ovary), one style, and a 4-lobed stigma. Fruit a capsule, 
4-celled and many-seeded. Marshy herbs, with undivided (simple), entire leaves. 
Marsh Isnardia. (Ludwigia apetala, Wallr.) — The only British species (as just 
described). The flowers minute, without petals, and stalkless ; the capsule broadly oblong, 
bluntly 4-sided, with many seeds ; the stems 2 inches to 1 foot long, branched, smooth, and tinged 
with red, creeping in mud or floating in water, and throwing out roots at the nodes ; the leaves 
opposite, egg-shaped, pointed and entire, shortly-stalked, and shining. 
Resembling the Water Purslane (Peplis Portula) in growth and colour, though a much larger 
plant. 
Very rare. Boggy pools and wet ditches in Hampshire, Sussex, and Jersey. June — July. 
Perennial. 
^EVENING PRIMROSE. (CENOTHERA, LINN.)— Not a native genus. Flowers large and 
showy, yellow, white, or pink, usually in terminal clusters or spikes. Sepals 4, uniting into a 
long tube prolonged above the seedcase and forming a honey cell, separating into 4 teeth ; petals 
4 ; stamens 8 ; carpels 4, uniting into a 4-celled seedcase, a thread-like style, and a 4-lobed 
stigma. Fruit a dry, oval, 4-angled capsule, 4-celled, with numerous seeds, opening by 4 valves. 
Herbs or undershrubs with alternate leaves. 
^Common Evening 1 Primrose. (CEnothera biennis, Linn.)— Not a native, though 
now quite established in several counties in England and Wales. As just described. The 
flowers large, i^-if inches across, bright lemon-yellow, in a terminal leafy spike; the capsule 
oblong, tapering to the apex ; the stem 2-3 feet high, stout and woody ; the leaves lance-shaped, 
