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 species is heaths and commons in the S. and E. of England. The plant has the shrub habit, resembling U. enropceus, but smaller. The stem is prostrate, then ascending, hairy. The primary spines are short, slender, round in section, finely furrowed, smooth, spreading, branched below. The flowers are in a raceme, yellow, half as large as in the Common Furze, with very small bracts, and are borne in the axils of primary spines, which are longer. The calyx is finely downy, the hairs appressed, the teeth spreading, lance-shaped. The petals are hardly distinct at length, the wing not so long as, or shorter than, the keel. The pod is persistent, till the next season. The plant is 1-3 ft. in height. It flowers between July and November. It is a perennial shrub.
The habitat of this plant is sandy heaths, dry gravelly places, sandy pastures. The habit is prostrate. The stem is without hairs, with slender branches from the base. The leaflets are inversely heart-shaped, toothed, with prominent veins. The leaf-stalk is short. There are large ovate stipules, with a long narrow point. The flowers are solitary, or in small heads or clusters of 3 flowers, in the axils, shortly-stalked, pink or white. The calyx is smooth, with slender, acute teeth, erect, and subequal. The petals are distinct, the keel about as long as the wings. The pods are flattened, curved, linear to oblong, blunt, with transverse furrows, hairy, exceeding the calyx, and open by 2 valves. There are 6-8 seeds. The plant is 2-8 in. in height, flowering in June and July, and is a herbaceous annual or biennial.
The habitat of this plant is sandy and gravelly places, heaths, dry banks, waste places. The plant is rare. The habit is ascending. The stem is more or less square in section, pithy. The leaves are trifoliate, the leaflets inversely ovate to oblong, toothed, notched, with a blunt point. The flowers are large, yellow or blackish - green with darker streaks, and change to green. The pods form a complete flat ring, the stalks being shorter than the calyx, and longer than the bract. The plant is 6 in. to 2 ft. high, flowering in June and July, and is a herbaceous perennial.
The habitat of this plant is sand)', gravelly places, gravel banks, dry banks, waste sandy places, heaths. The habit is erect or prostrate. The stem is usually round, nearly solid, branched. The leaflets are narrowly linear, inversely egg-shaped to oblong, toothed, notched, blunt-pointed. The stipules are large and awl-like. The flowers are large and yellow, in narrow racemes, on short stalks, which are shorter than the calyx, longer than the bracts. The pods are linear, with flattened margins, straightly sickle-like (hence falcata), twisted, downy. The plant is 6 in. to 2 ft. high, flowering in June and July, and is a herbaceous perennial.
The habitat of this plant is sandy ground near the sea and waste places. The habit is prostrate. The plant is nearly smooth, slightly glandular. The stems are furrowed. The leaves are trifoliate, the leaflets inversely heart-shaped. The stipules are laciniate. The flowers are yellow, in umbels on very short stalks with 1-5 flowers. The pods are flat, deeply netted, loosely coiled two to three times, with a thin edge, with a double row of long spines, which are awl-like, equal to or half the diameter of the pod, in 2 rows, spreading, hooked. The seeds are narrowly kidney-shaped. The plant is 6 in. to 2 ft. high, flowering- from May to August, and is a herbaceous annual.
The habitat of this plant is either by the wayside, on hedgebanks, or in pastures, or waste ground, cornfields. It is more common in South and South-east England, and a casual elsewhere. The habit is prostrate, the numerous smooth stems bearing inversely heart-shaped leaflets, with a purple spot (hence another name, maculata, Sibth.) in the centre. The flower-staiks bear 1-4 yellow flowers, and the nearly round pods with 3-5 coils, many-seeded, bear 4 ridges and a central furrow on the broad edges. The plant is 5-8 in. in height. It flowers between May and August, and is an annual.
The habitat of this plant is sandy fields, chiefly in the south-east, but it is a rare plant. The plant is prostrate, rigid, downy, with numerous stems. The flowers are yellow. The pods are nearly round, and differ from those of the rest of the Medicks in being smooth, with a thin edge, coiled four times. The flowers are very small, being not more than 1/8 in. across. The plant is 6-10 in. in length. Flowers are found between May and July, and like the others the plant is annual.
The habitat of this plant is dry places, often near the sea, heaths, etc. The habit is prostrate. The plant is sparingly hairy. The stem is very slender (hence filiforme). The leaves have lobes each side of a common stalk in threes, or finger-like. The leaflets are inversely heart-shaped or egg-shaped, toothed at the tip, stalkless. The stipules are egg-shaped above, acute. The flowers are dark-yellow, few (2-7), in a loose raceme, turned-back, axillary. The flower-stalk is thread-like, the ultimate stalks as long as the calyx, spreading, or turned-back. The standard is keeled, folded over, the pod deeply notched. The pod and calyx are as in the last. The plant is 2-9 in. long, flowering in June and July, and is a herbaceous annual.