Ramaley : SEED AND SEEDLING OF WESTERN LARKSPUR. 421 



Figure 6. Transverse section of seed through the equator. The 

 vascular bundle is in the upper corner, x 18. 



Figures 7, 8, 9, 10, n, 12. All x 18. Diagrams of cross sections 

 of the seedling cut at various levels. Figure 7. The root, thick cor- 

 tex and small stele with two xylem masses. Figure 8. The root, 

 higher up, a single mass of xylem. " From this the cotyledonary leaf 

 traces extend out horizontally" (Figure 9). Figure 10. The coty- 

 ledonary sheath with two vascular bundles encloses the stem. Figure 

 1 1 . The cotyledonary sheath is ruptured. The sheathing bases of the 

 foliage leaves, arranged alternately, enclose the small triangular apex 

 of the stem. Figure 12. The united petioles of the cotyledons with 

 the slit-like air passage. 



Figure 13. Diagram of a cross section of the petiole of the first leaf. 

 The central air cavity is shown, also the circle of vascular bundles 

 (dotted), each with a small amount of stereom (black), x 24. 



Figure 14. Section of a seed soaked in water. The epidermis has 

 a very thick cuticle ; the parenchyma is large-celled. The layer of 

 small cells with thick walls is the tegmen. The endosperm cells are 

 prismatic (contents not shown). X 270. 



Figure 15. Vertical section of the blade of first foliage leaf. Two 

 stomata are shown in the lower epidermis. One of the cells of the 

 palisade layer is branched at the top. Chlorophyll bodies and nuclei 

 are shown in the cells. X 270. 



