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Aug. 20 — 63 (Lin vulgaris)

Yellow common Linaria — Bees enter, but many bite holes into long nectary.—

Stigma lies in a triangular space between 2 upper anthers (in Antirrhinum stigma lies between 2 lower anthers & evidently get own pollen) & it is wonderful does not get own pollen in abundance; but pollen very coherent.—

Covered up several five fine plants under net.

The surrounding plants produced a solid spikes of fine capsules. — It is evident that the uncovered plants were absolutely crowded with pods & only a very few on plants under net /over

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June 1864 / the 5 one finest covered plants produced only 25 pods — of these 5 were much richer than other 20, several of which contained hardly any & very poor seed.

The 5 best contained.

[calculations not transcribed]

Of the plants covered with pods, which grew close alongside I took 5 capsules by chance, & cleared the seed, the numbers apparently did not differ much; but I took an average one & counted seed & they numbered 166.—

[177]

[calculations not transcribed]

[177]

[Draft fragment of Descent chapter VII]

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itself

& justly looked at as deci a decisive [text excised]

specifically distinct. As a natural test of this fact sterility or of instinctive repugnance the coexistence of two forms in the same district, without their blending having become becoming blended together usually settles the question. Geographical distribution is sometimes brought in as evidence, though not perhaps quite logically; so that two forms inhabiting two distinct regions areas, in