Botany and Zoology. 127 
ke the minute hand of a gigantic clock.” (p. 75. 
Cucurbitaceous tendrils are mostly compound, in this case three-forked, 
~heaught tendrils when they thus coil up throw themselyes o 
mto a simple helix or spire. One end being free, this is the simple and 
hecessary consequence of the relative shortening of the concave side, suf- 
ficiently continued. : 
In a caught tendril, the relative shortening of one side, (through which 
the tip hooks round and fixes itself to the supporting object,) being prop- 
piral form—with 
Up tendril, usually in the middle, the turns on one side of it running from 
nght to le 
_ ‘Sttached, “the strain is thus ually distributed to the several attached — 
branches of a branched tendril ; and this must render the whole tendril 
