Peas, i. 326-330;
origin of, 326;
varieties of, 326-329;
found in Swiss lake-dwellings, i. 317, 319, 326-329;
fruit and seeds figured, i. 328;
persistency of varieties, i. 329;
intercrossing of varieties, i. 330, 397, ii. [129];
effect of crossing on the female organs in, i. 398;
double-flowered, ii. [168];
maturity of, accelerated by selection, ii. [201];