Of Aphyllon Uniflonon, Gray. 121 



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, Monographic der Gattung Orobanche. (1890.) Bibl. Bot., 



Heft 19. 

 Baillon, Hist, des Plantes. (1891.) 



Chatin, Anatomic Compar6e des Vegetaux, Plantes Parasites. (Paris, 1892.) 

 Gray, Asa, Flora of X. 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 Conopkolis Americana. Contributions 



from Bot. Lab. of U. of P., Vol. II, p. 3. 



EXPLANATION OF PLATES XIII, XIV AND XV. 



Plate XIII, Plant of Aphyllon growing on Aster corymbosum. 



Plate XIV, Fig. I. L. S. Root of Aphyllon. 



Fig. 2. T. S. Root of ^///_j'//(3«, forming parasitic connection with root-tissues 



of Aster. 

 Fig. 3. T. S. Stem of Aphyllon. 



Fig. 4. T. S. Ovary of Aphylloji, showing placental tissue with ovules. 

 Plate XV, Figs. I, 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. 



