Embryo in Lilaea subulata, H. B. K. 
27 
EXPLANATION OF FIGURES IN PLATES 
I, II, AND III. 
Illustrating Professor Campbell’s Paper on Lilaea subulata. 
PLATE I. 
Fig. 1. Median longitudinal section of a young plant; x 40; 1 , 1 , leaves; 
9, female; 5, male flowers; sq., squamulae intravaginales ; i, lacunae in the 
leaves. 
Fig. 2. A similar section of a younger plant with the primary axis transformed 
into the first inflorescence, x ; lettering as in Fig. 1. 
Fig. 3. Median section through a very young floral complex from the middle 
region of the inflorescence ; x 600 (about) ; /, the subtending bract ; £, male ; 
9, female flower. 
Fig. 4. A similar section of an older floral complex ; x 100. 
Fig. 5. Longitudinal section of the young stamen, showing the arrangement of 
the primary tissues ; x 350. 
Fig. 6. A similar section of an older stamen; x 100; l, the subtending bract. 
Fig. 7. Cross-section of a young stamen, showing the four loculi ; s, sterile lobe ; 
x 350- 
Fig. 8. A single loculus from another of about the same age as that shown in 
Fig. 6 ; x 600. The limits of the plerome are indicated by a heavy line. 
Fig. 9. Cross-section of a loculus showing the young sporogenous tissue; x6oo. 
The sporogenous cells have the nuclei shown. 
Fig. 10. Longitudinal section of the anther shortly before the isolation of the 
sporogenous cells ; x 600 ; c, d, the outer tapetal cells ; t , the cells of the inner 
tapetum. 
Fig. 11. Young spore-tetrad imbedded in the nucleated protoplasm derived from 
the disintegrated tapetal and sterile sporogenous cells. 
Fig. 12. Section of a nearly ripe pollen-spore, with the generative cell, g, and 
the nucleus, v, of the large vegetative cell ; x 600. 
Fig. 13. Cross-section of the wall of the ripe anther ; x 600. 
Fig. 14. Germinating pollen-spore upon one of the stigmatic papillae, p ; x 600. 
Fig. 15. Longitudinal section of a very young basal (long-styled) female flower ; 
x 350 ; 0, the ovule. 
Fig. 16. The ovule from a somewhat older flower; v, the apex; x 600. 
Fig. 17. Longitudinal section through a very young short-styled flower; car. the 
carpel ; 0 , the ovule ; x 600. 
Fig. 18. Longitudinal section of an ovule after the differentiation of the first 
integument, in. ; t., the primary tapetal cell ; x 600. 
PLATE II. 
Fig. 19. Longitudinal section of young short-styled flower; x 600; 0, ovule; 
car., carpel. 
Fig. 20. Longitudinal section of the young ovule, showing the beginning of the 
first integument, in. ; x 600. 
