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, 11, 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. ‘+ Fromthis the cotyledonary leaf 
traces extend out horizontally” (Figure 9). Figure 10. The coty- 
ledonary sheath with two vascular bundles encloses the stem. Figure 
11. 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). xX 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. xX 270. 
