[164]

Belt Nicaragua. p. 224. Red Passion-flower— young leaves & sepals of flower-buds secrete nectar & attract ants.—

[Cross and self fertilisation, p. 403: "In the case of the glands on the stipules of Vicia sativa, the excretion manifestly depends on changes in the sap, consequent on the sun shining brightly; for I repeatedly observed that as soon as the sun was hidden behind clouds the secretion ceased, and the hive-bees left the field; but as soon as the sun broke out again, they returned to their feast.* I have observed an analogous fact with the secretion of true nectar in the flowers of Lobelia erinus.
*Belt also refers ('Nicaragua' page 224) to a similar excretion by many epiphytal orchids and passion-flowers. Mr. Rodgers has seen much nectar secreted from the bases of the flower-peduncles of Vanilla."]