8.  Specularia speculum.

Only the four tallest of the crossed and the four tallest of the self-fertilised plants, growing in four pots, were measured; and the former were to the latter in height as 100 to 98.  In all four pots a crossed plant flowered before any one of the self-fertilised plants, and this is usually a safe indication of some real superiority in the crossed plants.  The flowers on the parent-plants which were crossed with pollen from another plant yielded seeds compared with the self-fertilised flowers in the ratio of 100 to 72.  We may therefore draw the same conclusion as in the last case with respect to a cross being decidedly beneficial.

9.  Borago officinalis.

Only four crossed and four self-fertilised plants were raised and measured, and the former were to the latter in height as 100 to 102.  So small a number of measurements ought never to be trusted; and in the present instance the advantage of the self-fertilised over the crossed plants depended almost entirely on one of the self-fertilised plants having grown to an unusual height.  All four crossed plants flowered before their self-fertilised opponents.  The cross-fertilised flowers on the parent-plants in comparison with the self-fertilised flowers yielded seeds in the proportion of 100 to 60.  So that here again we may draw the same conclusion as in the two last cases.

10.  Passiflora gracilis.

Only two crossed and two self-fertilised plants were raised; and the former were to the latter in height as 100 to 104.  On the other hand, fruits from the cross-fertilised flowers on the parent-plants contained seeds in number, compared with those from the self-fertilised flowers, in the proportion of 100 to 85.

11.  Phaseolus multiflorus.

The five crossed plants were to the five self-fertilised in height as 100 to 96.  Although the crossed plants were thus only four per cent taller than the self-fertilised, they flowered in both pots before them.  It is therefore probable that they had some real advantage over the self-fertilised plants.

12.  Adonis aestivalis.

The four crossed plants were almost exactly equal in height to the four self-fertilised plants, but as so few plants were measured, and as these were all “miserably unhealthy,” nothing can be inferred with safety with respect to their relative heights.

13.  Bartonia aurea.

The eight crossed plants were to the eight self-fertilised in height as 100 to 107.  This number of plants, considering the care with which they were raised and compared, ought to have given a trustworthy result.  But from some unknown cause they grew very unequally, and they became so unhealthy that only three of the crossed and three of the self-fertilised plants set any seeds, and these few in number.  Under these circumstances the mean height of neither lot can be trusted, and the experiment is valueless.  The cross-fertilised flowers on the parent-plants yielded rather more seeds than the self-fertilised flowers.