38 CLASS-BOOK OF BOTANY. 
cases, its leaves also, reduced to spines; the pods burst elastically on 
bright sunny days, as do those of the preceding plant. Clovers (Tri- 
folium) of various species have their flowers clustered into rounded heads. 
or yery short dense racemes; the pods are usually indehiscent. 
Any or all of the following should be compared with the foregoing : 
Lupins (Lupinus sp.), Laburnum (Cytisws laburnum), Lucerne (Medicago 
sativa), Robinia, Vetches (Vicia sp.), Bean (faba vulgaris), French 
Bean (Phaseolus vulgaris), Dolichos, &e, 
(c.) Clanthus puniceus, the most gorgeous of New Zealand 
peas, has pinnate leaves, with many pairs of leaflets, and pen- 
dulous bracteate racemes of large crimgon flowers. Note the 
cup-shaped 5-toothed calyx, the reflexed standard, and the 
very long acutely-pointed keel. 
You will find in this, as in 
many similar flowers, that the 
anthers shed their pollen into 
the end of the keel, which forms 
a tube in which the style lies. 
Ze Fig. 45. Flower of Cliantius, 
Fig. 44. Flower of Clianthas. in longitudinal section. 
The lower part of the style is furnished with hairs which aot 
as a brush, so that when the keel is forced back these hairs 
sweep out the pollen with considerable force. Try the al eae 
ment with a pencil-point. These flowers are chiefly vised oe 
tuis and korimakos (honey-birds), which in this way pony y 
fertilise them, for at the same time that the pollen 1s he _ 
out, the point of the stigma projects. In this way the i ot 
are constantly getting pollen on the feathers of the fron 
