
NATURAL ORDERS ap 
tendrils, which enable the plant to climb; in one species’ 
___ of Lathyrus, the whole leaf is modified into the tendril, whilst 
the leaves of some 
| shrubs, such as Gorse, 
—are spinous. Broom has 
simple, not compound, 
leaves. In the Scarlet 
Runner the stem, not 
the leaf, is the climbing 
— organ. : as 2 
In Clover not only Fic. 76.— MEDIAN VERTICAL SECTION OF 
? CLOVER. 
the calyx, but the s, standard ; a, wings ; &, keel. 
corolla, persists. The es 
petals are joined and the stamens are partly attached to the 
| corolla-tube. In one species of Clover 
the fruit ripens underground. 
The twisted fruit of Medick Pra be 
noted. 
In some genera—e.g., Ornithopus—the 
ovary becomes divided by transverse 
divisions into as many cells as_ there 
are seeds. ‘The fruit is then called 
a lomentum; it dehisces transversely 
Into nut-like joints. 
The fruit of the Sainfoin is a one-seeded nut. 
In some cases the calyx becomes bladder- 
like, developing into an organ of dispersion. 
Lady’s fingers (Anthyllis) and a species of 
Clover (Trifolium fragiferum) are instances of 
this (Fig. 79). 
_ The mode of germination is varied in the 
Papilionacee. In the majority the cotyle- 
dons come above ground, develop chloro- 
phyll, and take part in the work of assimi- * erences 
lation; but in the Vetches and Peas and ctuopus. 
some other genera the cotyledons are thick 
and white, remain in the ground, always enclosed in the 
a 


Fig. 77.— FRUIT OF 
MEDICK. 


