56S 



TRANS. ST. LOUIS ACAD. SCIENCE. 

 EXPLANATION OF PLATES XIIL AND XIV. 



Fig. I. a. Mucilaginous spirals of ^./o/)'^o«//b//a ; i". surface view of mucilaginous cells. 



Fig 2. Cross-section; s&e.^ oi E. polygon if olia. a. Mucilaginous cells showing strati- 

 fication ; h. the underlying granular portion ; /. palisade-like cells; c. elon- 

 gated parenchyma cells : e. endosperm. 



Fig. 3. Cross-section, seed of £. wi«r^/«a/rt. n. Outer cells showing elongated thicken, 

 ings; a'b. underlying parenchymatous layers ; /. palisade-like cells; c' d . 

 two layers following the palisade-like cells, belonging to the inner seed-coat. 



Fig- 4. Cross.section, seed of JE. dentata. B, Showing the general arrangement of the pa- 

 pillate-like outer cells; A a. mucilaginous papillate-like cells; b. underlying 

 granular portion; /. palisade-like cells; c. parenchyma cells belonging to 

 inner seed-coat; c'. layer next to the endosperm; e. cells provided with 

 cross-thickenings. 



Fig. J. Cross-section ; seed of £. o&/?«a/a. A a. Outer layer of papillate-like cells; a'. 

 underlying thin-walled elongated cells ; /. palisade-like cells ; e. thin-walled 

 elongated cells; Ba. some of the outer cells showing pores. 



Fig. 6. A. Cross-section ; seed and caruncle of E. commutata. a. Outer mucilaginous 

 cells; d. underlying granular portion ; /. palisade-like cells; e. endosperm, 

 B. Cross-section of caruncle. 



Fig, 7. Cross-section; seed of E. Geyeri. a. Mucilaginous cells; b. underlying gra- 

 nular portion; b'. parenchymatous layer next to the palisade-like cells/ ; 

 c, thin-walled parenchyma cells next to the endosperm. 



Fig. 8. a'. Surface view of a few vessels in the seed-coats of £. G^y^r/. 5', Mucilaginous 

 cells of the same species in surface view. 



Fig. 9. Cross-section ; seed of E. Lathyris. a. Thick-walled outer cells. The outer por- 

 tion of cell-wall colorless, while the inner is of dark brown color ; a'-J'. thick- 

 walled cells next to palisade-like cells/. According to Harz, the cells ofb' are 

 said to be mucilaginous. 



Fig. 10. Cross-section ; seed of £.A«*'a^o«(i. Aa. Outer mucilaginous cells; b. underly. 



ing granular portion; /, palisade-like cells ; c. elongated Hhin-walled cells ; 



c'. cells provided with thickenings running across the cells ; E. endosperm; 



£, mucilaginous cells; a. underlying granular portion; b,a'. an expanded 



mucilaginous cell ; C, showing general arrangement of mucilaginous cells 



at a. 

 Fig. II. Cross-section ; seed of .E. //<?/(?ro/i//j'//«. a. Outer mucilaginous cells. Cellcontents 

 ,. brown; b. underlying granular portion, followed by a, layer of thin-walled 



cells, b', and sclerotic cells, e'; p. palisade-like cells; c. elongated thin-walled 



cells belonging to inner seed-coat. ; E. endosperm. 

 Fig. 12. Cross-section; seed of E. corollata. Aa. Mucilaginous cells with dark brown 



contents showing stratification of the cell-walls ; b. underlying granular portion ; 



b' . thin-walled parenchyma cells; /. palisade-like cells; a'c. thin-walled 



parencliyma cells next to the endosperm; B. a. mucilaginous cells showing 



stratificaticm ; b. underlying granular portion. 

 Fig. 13, Cross-section; seed oi E.glyptosperma. a. Mucilaginous cells; &. underlying 



granular portion; /. palisade-like cells; 7-. thin-walled elongated cells ; E. 



endosperm. 

 Fig. 14. Cross-section; seed of E. Cyparissias. a. Outer layer of cells; a', thin-walled 



parenchyma layer of cells; /. palisade-like cells ; c. thin-walled parenchyma 



cells next to endosperm. 



