10] BLODGETT—BULBS OF ERYTHRONIUM 373 
Fic. 28.—The three buds in the immature bulbs of E. americanum; 
main stem apex; 2, bud axillary to leaf; 3, bud axillary to scale; z and 3 
on the same section. 
Fic. 28a.—Sagittal section of bud 3, to show apical dom 
+ 29.—Outline of entire section shown in fig. 28; seule of buds r 
he 30.—Similar section in reference to bud 2; in each the ee base - 
of the petiole is p. 
__ Fics. 31-33.—Cross-sections of bulb rudiment, showing relation of the same e 
Structures as shown in figs. 28-30; the sections follow in order of their numbers 
Fics. 34, 35.—Cross-sections of developing flower bud in early September 
and early December, on the same scale and in the same orientation; f, foliage 
leaves; p, petals; s, stamens; 0, ovary wall; /, line of dehiscence (lateral margin 
of carpel); w, wing-placenta from median region of carpel; m, wm normal and 
degenerating microspores, 
Fic. 36.—Twin embryos of E. americanum, X5; the union of the two 
cotyledons shown below in outline. 
. 
