356 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XLIX. 



(Reduced about one-third). 



Fig. 1. Longitudinal section of a young spikelet : X 57; lg, lower glume; 



c, carpel; ?, young ovary; $ , young stamen. 



Fig. 2. Section of older spikelet to show the beginning of the lamina of the 



lower glume: X 57; /, lamina; other lettering as in fig. r. 

 Fig. 3. Median longitudinal section of the primordium of a spikelet: X 320; 



d, dermatogen; pr, periblem; pi, plerome. 



Fig. 4. A similar section, not quite median, showing an older floral rudiment: 



X 320; si, floral apex; lg, lower glume. 

 Fig. 5. Longitudinal section of apex of flower in which the upper palet 



{tip) and lodicula; (lo) appear: X 320. 

 Fig. 6. Longitudinal section of floral apex: X 320; lettering as above. 

 Fig. 6a. Longitudinal section of young ovule with carpel (c): X 320. 



