80 ENGLISH BOTANY. 
In pastures, banks, borders of fields, and on rocky slopes; most 
partial to chalky soils. Rather common in the South of England, 
but becoming rare towards the North, and doubtfully native in 
Scotland, from which country it has only been reported from Ayr- 
shire and Kincardineshire. 
England, Scotland? Perennial. Summer. 
Stems very numerous, much branched, decumbent, 6 to 18 
inches long. Leaves 1 to 3 inches long, with 4 to 7 pairs of ellip- 
tical sub-glabrous leaflets, often truncate at the apex. Peduncles 
axillary, usually about twice as long as the leaves. Flower-heads 
depressed-globular, 5- to 12-flowered, with an extremely short 
involucre of scarious bracts. Flowers 2 to 4 inch long, pale- 
yellow, spreading when expanded at length reflexed. Pedicels 
shorter than the calyx-tube. Calyx very short, bell-shaped, 
with deltoid triangular teeth, the 2 upper ones united for the 
greater portion of their length and separate from the 3 lower. 
Petals more than three times as long as the calyx, contracted 
into slender claws as long as the laminze, that of the standard 
remote from the others so as to leave a space between them. Pod 
1 to 13 inch long, generally curved downwards into a semicircle or a 
ring, with a series of almost continuous crescent- or kidney-shaped 
excrescences over the seeds, occupying its entire breadth over 
the middle of each and narrowing off towards each end, where they 
curve towards the superior margin. Seeds 2 to 6, brown, similar 
in shape to the excrescences which are over them. Plant pale- 
green, slightly glaucous, glabrous except occasionally a few hairs 
on the midribs of the leaves, peduncles, pedicels, and upper part 
of the stem. 
Horse-shoe Vetch. 
French, Hippocrépide en Ombelle. German, Schopffirmiger Hufeisenklee. 
Sub-Tripe Il.—EU-HEDYSARE. 
Pod much compressed, and generally much constricted between 
the joints, which are few (occasionally reduced to 1), often rugose, 
muricated or spiny. Flowers in terminal racemes. Leaves pin- 
nate, with an odd terminal leaflet, or pinnately-trifoliate, rarely 
unifoliate. 
GENUS XV.—ONOBRYCHIS. Zournef. 
Calyx bell-shaped, with 5 long subulate nearly equal teeth. 
Standard oval or obovate, spreading; wings shorter than the keel ; 
keel obliquely truncate at the apex, somewhat beaked. Stamens 
