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DICOTYLEDONS-continued ANGIOSPERMS -

SUBCLASS I: CLASS

Githago segetum (Caryophylleae). The first leaves produced by young seedlings, rise up and close together at night. On a rather older seedling, two young leaves stood at noon at 55° above the horizon, and at night at 86°, so each had risen 31°. The angle, however, was less in some cases. Similar observations were occasionally made on young leaves (for the older ones moved very little)

produced by nearly full-grown plants. Batalin says (Flora, 1 Oct., 1873, p. 437) that the young leaves of Stellaria close up so completely at night that they form together great buds.