Of Aphyllon Uniflorum, Gray. I2I 
4. A well-developed ovarian nectar-gland is present. 
5. Starch is present in great quantities in roots, stems, 
leaves and carpellary tissue. 
BIBLIOGRAPHY. 
Beck von Managetta, Monographie der Gattung Orodanche. (1890.) Bibl. Bot., 
Heft ro. 
Baillon, Hist. des Plantes. (1891.) 
Chatin, Anatomie Comparée des Végétaux, Plantes Parasites. (Paris, 1892.) 
Gray, Asa, Flora of N. A. 
Koch, Entwicklungsgeschichte der Orobanchen. (Heidelberg, 1887.) 
Meehan, Thos., Proc. Acad. Nat. Sci., 1881. Part II. Pp. 160-162. 
Wilson, Lucy L. W., Observations on Conopholis Americana. Contributions 
from Bot. Lab. of U. of P., Vol. II, p. 3. 
EXPLANATION OF PLATES XIII, XIV AND XV. 
Plate XIII, Plant of Aphy//on growing on Aster corymbosum. 
Plate XIV, Fig. 1. L. S. Root of Aphyllon. 
Fig. 2. T. S. Root of 4phy//on, forming parasitic connection with root-tissues 
of Aster. 
Fig. 3. T. S. Stem of Aphyllon. 
Fig. 4. T. S. Ovary of Aphyllon, showing placental tissue with ovules. 
Plate XV, Figs. 1, 2. Developing ovules of Aphyllon. 
Fig. 3. Mature ovule, containing precocious endosperm and egg cell. 
Figs. 4, 5. Upper part of endosperm surrounding segmenting egg cell. 
Fig. 6. Macrospore enclosing endosperm and multicellular embryo. 
Fig. 7. T. S. Nectary. 
