. The power of movement in plants. Plants; Botany. Cu.\r. n EUDIMENTAEY COTYLEDONS 95 rig. 61. Willi the orange [Ciirvs aurantium) the cotyledons are hypogean, and one is larger than the other, as may be seen in A (Fig. 60). In B the inequality is rather greater, and the steni has grown between the points of insertion of the two petioles, so that they do not stand opposite to one another; in another case the separation amounted to one-fifth of an inch. The smaller cotyledon of one seedling was extremely thin, and not half the length of the larger one, so that it was clearly becoming rudimen- t
. The power of movement in plants. Plants; Botany. Cu.\r. n EUDIMENTAEY COTYLEDONS 95 rig. 61. Willi the orange [Ciirvs aurantium) the cotyledons are hypogean, and one is larger than the other, as may be seen in A (Fig. 60). In B the inequality is rather greater, and the steni has grown between the points of insertion of the two petioles, so that they do not stand opposite to one another; in another case the separation amounted to one-fifth of an inch. The smaller cotyledon of one seedling was extremely thin, and not half the length of the larger one, so that it was clearly becoming rudimen- tary.* In all these seedlings the liypocotyl was enlarged or swollen. With Abronia umbellafa one of the cotyledons is quite rudimen- tary, as may be seen (c) in Fig. 61. In this specimen it consisted of a little green flap, -jL-th inch in length, destitute of a petiole and covered with glands like those on the fully developed cotyledon (c). At first it stood opposite to the Abronia umbeWda. seed- larger cotyledon ; but as the petiole of the latter increased in length and grew in the same line with the hypocotyl (h), the rudiment appeared in older seedlings as if seated some way down the hypocotyl. With Ahronia arenaria there is a similar rudiment, which in one. ling twice natural size: c, cotyledon; c', rudi- mentary cotyledon; A, enlarged hypocotyl, with a heel or projec- tion (//) at the lower end; r, radicle. * In Paehira aqiiafica, as de- ecribed Ijy Mr. R. I. Tjynch ('Journal Linn. Soo. Bot.' vol. xvii. 1878, p. 147), one of the hypogean cotyledons ia of ira- uiense size; the other is small anil snon falls off; the )iair di' nut always stand opposite. In anctiier and very different water-plnnt, Trapa mi'ans, one of tlif coUle- doiis, filled with farinaceous matter, is much larger than the other, which is sciircely visible, as is stated by Aug. de Ciindolle, ' Plivsiulogie Veg.' torn. ii. p. 8;^4, Please note that these images are extracted from scanned page images th
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