104 THE PEAFLOWER TRIBE, 
IlI. CYTISUS. BROOM. 
Shrubs, with stiff, green branches, the leaves mostly with 3 divitate 
leaflets. Calyx campanulate, with 2 short, broad lips, minutely toothed 
at the top. Petals broad, the keel obtuse and slightly incurved. 
Stamens all united into a complete sheath. Pod flat, much longer than 
the calyx. Seeds several, with a strophiole at the hilum. 
A large genus, extending over Europe and the Mediterranean region 
to the Canary Islands. The most constant character to distinguish it 
from Genista is the strophiole of the seed, but in the case of most 
species it is also known by the 3-foliolate, not simple leaves, broader 
petals, &c. The only British species has been by some modern 
botanists separated under the name of Sarothamnus, chiefly on account 
of the spiral style; but some European species show a gradual passage 
from the long spiral to the short and straight style. 
The Jrish Broom of our gardens is the C. patens from Portugal, not a 
native of Ireland. The Spanish Broom belongs to the genus Spartium. 
Several other south European true Cytisz are cultivated in our gardens. 
1, C. scoparius, Link. (fig. 232). Common B.—A shrub, of 3 to 5 
feet, glabrous or nearly so, with numerous long, straight and erect, 
green, wiry branches prominently angled. Lower leaves shortly stalked, 
with 3 small, obovate leaflets; upper leaves sessile; the leaflets often 
reduced to a single one. Flowers large, bright yellow, solitary or in 
pairs, on slender pedicels, in the axils of the old leaves, forming hand- 
some leafy racemes along the upper branches Petals all broad, the 
standard broadly orbicular, the keel often deflected as in Genista. Style 
very long and spirally incurved. Pod 14 to 2 inches long, flat, hairy 
on the edges, but glabrous on the sides, the seeds attached to a line 
considerably within the edge of the pod. Sarothamnus scoparius, Koch. 
On dry, hilly wastes and bushy places, chiefly in western Europe, 
but extending more sparingly to its eastern limits, and northward into 
southern Sweden. Common in Britain. Fl. spring and early summer. 
[A prostrate, var. (prostrata, Hanb.), occurs in Cornwall and the Channel 
Islands. ] 
IV. ONONIS. ONONIS. 
Herbs or low undershrubs, with pinnately trifoliolate, or rarely 
simple leaves; the leaflets generally toothed; the stipules leafy, 
adhering to the leafstalk ; the flowers solitary, on axillary peduncles, 
often forming terminal leafy racemes. Calyx with 5 narrow segments. 
Standard large and striate. Keel terminating in a pointed beak. 
Stamens all united in a sheath. Pod inflated, with few seeds. 
A rather numerous genus, chiefly from the Mediterranean region. 
The toothed leaves are like those of the T'rifoliwm group, whilst the 
stamens are monadelphous, as in Genista and its allies. 
A much branched perennial or undershrub, often mice ies : . L. O. arvensis. 
A small, erect annual . é . 2. O. reclinata. 
1. O. arvensis, Tava (fig. 233). Resear row.—Very variable in 
aspect, generally a low, spreading, much branched undershrub, often 
rooting at the base or creeping underground, sometimes. nearly erect, a 
foot high or more, rarely glabrous, usually thinly clothed with soft 
spreading hairs, and more or less glutinous; the hairs either covering 
