1904] LEWIS, ANOMALOUS DICOTYLEDONS 137 
lings of Jeffersonia and Caulophyllum for comparison with the 
conditions found in Podophyllum. ‘Up to this time (March 20) 
seeds of Podophyllum and Jeffersonia collected last year have 
refused to germinate. It seems that they require a long resting 
period and will not germinate until the spring following their 
maturity. It is hoped that this year the germination of the seeds 
and the development of the seedlings may be observed. 
INDIANA UNIVERsITY, 
Bloomington, Ind 
LITERATURE CITED. 
‘ Bests, F. M., Development of the embryo sac of /Jeffersonia diphylia. 
T. GAZ. 20: 423-424. 1895. 
; pote: D. H., On the affinities of certain anomalous dicotyledons. 
Am. Nat. 36:7-12. 1902. 
- Cook, M. T., Development of the embryo sac and embryo of Castalia 
odorata and Nymphaea advena. Bull. Torr. Bot. Club 29: 211-220. 
Lal 
NS 
Ww 
Igo2. 
Houm, THEO., Podophyllum peltatum, a morphological study. Bor. Gaz. 
27: 419-433. 1899. 
LuBgock, J., A contribution tu our knowledge of seedlings. 1892. 
- Lyon, H. L., Observations on the embryogeny of Nelumbo. Minn. Bot. 
Studies 2: 643-655. Igol. : 
7. —-——, The philogeny of the cotyledon. Postelsia 1901: 55-86. 1902: 
- SARGANT, ETHEL, A theory of the origin of monocotyledons founded on 
the structure of their seedlings. Annals of Botany 17: I-92. 1903. 
- 
au 
co 
EXPLANATION OF PLATES VII AND VIII. 
PLATE VII. 
Fics. 1-14. Podophyllum peltatum. 
Fig. 1. Section of two-celled re with large synergid. X 180. 
Fig. 2. Eight-celled embryo. <1 
Figs. 3-4. Embryos with broad or RAE body and long suspensor 
80. 
G. 5. Embryo shortly before the beginning of the development of the 
ccylod primordium. X 180 
Fic. 6. A series of cross-sections from an embryo showing the cotyledonar 
Primordium ; the sections of all the series shown in the figures are 15 thicl 
X 25. 
Fig. 7. A series of sections from an older embryo, showing the beginning 
of the cotyledonar tube, andthe bifurcation of the ridge to form two cotyledons. 
X 25. 
