[C7]

(a) I believe this is also case in Sweet Pea — I see no contrivance in these flowers (viz  Lupine Clover Sweet Pea) to favour intermarriage.

{It is wonderful how many near approaches to stamens being quite shut up, without one instance of this actually being case—

How rare pollen close to stigma, except in Grandiva & then special provision for cross This applies to sheath in clover &c— & in subaqueous Subularia: Scarcely credible that pollen shd not oftener be placed closer, if constant self impregnation object of nature

(a) Clover. June /41/ I see innumerable Bees visit large red sort, most such flowers & admirable manner they quickly insert sucker in almost every flower in head. Some, however, seek between flower, just same double case as in Beans.—

The very big Humble with long proboscis in opening space between standard & inside of Keel, I should think from trying afterwards, would generally protrude stigma & pollen; but I saw a small Humble; which was obliged to force in his head, forced open & scattered pollen in every one of the Keels, few of which regained their proper position. — H I see innumerable Bees forcing open white Dutch clover & shedding pollen from Keel; in whole field, 1000s of Humbles visiting every flower but— not one touched the minute yellow trefoil: I strongly suspect each flower has short period, during wh. bees frequent it, & then leaves it— I never saw nearly so many bees any other day on clover

[C7v]

(1[0]

Clover. I think presents more difficult than any other flower.— Stigma very little longer than anthers (a) — pollen abundant— Sheath closely shut(NB I see sheath split behind as well as front). Sheath being much smaller than in Lupine presents more difficulty than in that Flower for insects &c &c.— Moreover the single petal is upright & protects somewhat the mouth of sheath.— I think sheath so close pollen, which is shed easily, would hardly escape from sheath (—Palm pollen has been kept a year). Emma has seen bees visiting flowers of white clover extremely quickly one after other— but perhaps, like in common Pea they do not go near anthers in Sheath— Pollen is ready as soon as ever flowers in full bloom.