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All self-fertile

Insects

Aug 29'— 1861 — Down— To show importance of Diptera: I saw large field yellow with charlock, & frequented by millions, almost every plant, with several Syrphidæ, mostly a large species — & very few Bees.— (I saw a Rhingia sucking blue Lobelia.)

Dichogamy

Veronica agrestis under Bell-glass set plenty of seeds, without any insect agency. —

Galium aparine under net set quite as many seeds as the uncovered.

Covered up Blood Red Onion 4 heads & other all round uncovered; these 4 heads had smaller capsule & fewer than all the other heads; from very experience with nets, I cannot think this the effect of

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Aug 31. Hawk-bees are sucking the orange Cuphea & never touch the other species.─

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the net which was open & did not touch plant.— One Head covered produced 200 199 capsules another small & poor Head uncovered produced 289, & this probably gives proportional fecundity —

There can be no crossing, all in & in, breeding under net.— This case important look at number of flower close together, each pistil with its six stamens & yet we see that pollen can get on own stigma for one head produced 199 capsules; & yet when several vars. grew together they crossed so largely — vars must have prepotency.

Sept 4. 1861 Stellaria media, with very minute flowers, plant under net & open produced equal number of capsules, & these on both contained plenty of good seed.─