. The Scottish botanical review . Bot. Zeit., xxxii., 1874. (3) MoTTiER, D. M.— On the Development of the Embryo-sac of Arisama triphylhim. Bot. Gazette, xvii. 258-260, 1892. PLATE I. Fig. I. Median section of a young carpel of Aglaonenia commiitatuni. x about 2. Young ovule of A. conivnitatuvi, showing the young embryo-sac {) and the two integuments, x 3. YoMVi^osvX^ Qi A. VIodestum, x 4. Nucellus of an o\ule of A. modestu;n of about the same age as that shown in fig. 3. x 250. , 5. Nucellus of the same species, showing a division of the primary
. The Scottish botanical review . Bot. Zeit., xxxii., 1874. (3) MoTTiER, D. M.— On the Development of the Embryo-sac of Arisama triphylhim. Bot. Gazette, xvii. 258-260, 1892. PLATE I. Fig. I. Median section of a young carpel of Aglaonenia commiitatuni. x about 2. Young ovule of A. conivnitatuvi, showing the young embryo-sac {) and the two integuments, x 3. YoMVi^osvX^ Qi A. VIodestum, x 4. Nucellus of an o\ule of A. modestu;n of about the same age as that shown in fig. 3. x 250. , 5. Nucellus of the same species, showing a division of the primary sporo- genous 6. Young ovule of ^. simplex. x 50. The embryo-sac (^..r.) contains two 7. The nucellus of the ovule shown in fig. 5. x 8. Cross-section of an embr)o-sac of A. simplex, containing two nuclei placed near the middle of the sac. x 9. Two longitudinal sections of an embryo-sac of A. covimjiiatiim, with two nuclei, placed at opposite poles of the sac. x 250. SCOT EOT RKV1 VOL 1. D H Camoneli: Dei. PLATE i CAMPBELL,-Embryo-sac oi Aglaonema .11 axAj^ .01 .31? aK V-i PLATE II. Fig. ro. Oblique section of an embryo-sac of A. simplex, with two nuclei, at the lower end of the sac. x II. Ovule of A. simplex vfiXh. an embryo-sac containing an egg apparatus and two free nuclei. x 12, 13. Details of the embryo-sac shown in fig. 11. 12 shows the egg (c>) and the two free nuclei : 13, the synergidse. x 14. Section of an embryo-sac of A. sitnplex in which were two nuclei, only one of which is shown in the figure. The nuclei were beginning to divide. x 15, 16. Two sections of an embryo-sac of ^. commutaUim, with four nuclei, placed in pairs at the poles of the sac. 15 shows one of the micro- pylar nuclei ; 16, a chalazal nucleus. x 17. Micropylar region of an embryo-sac of A. commutatum of about the same age as that figured in 15, 18. Cross-section of the apex of an embiyo-sac of A. s
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1912
