are varied by cultivation and by location I § 163–174, 190–198, IV § 48–84, V § 65–68.

Countless secondary genera and species are found II § 28.

Trees are the most perfect of plants I § 111–118.

Imperfect plants lack either root and leaf or leaf and fruit IV § 94, or flower, or both flower and fruit IV § 105–110.

Males and females are distinguished in a certain way I § 41, 189–191, 203.

Species are transformed V § 54–64.

Individuals are united V § 19–37, such as spurious parasites V § 20–23, such as true parasites V § 24, through grafting I § 184, V § 25; they are divided V § 38–43; they persist and are renewed V § 44–53.

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Chapter IV.

Morphology of plants.

The various figures of leaves, flowers, fruits, and seeds, most diligently observed by Albertus, are referred back to geometric forms. Because he saw that the forms of plants were produced in a wonderful way by the sun, he attributed these same powers also to the moon and the planetary stars, and he held their conjunctions in high regard II § 64–78, 104–106, 134–138, III § 21–34, VI § 129, 203–204, 489.

This opinion, confirmed by strenuous and ingenious arguments, was not refuted by those or the following centuries, which believed that even human affairs were ruled by planets, while our own times—