24 EXPLANATIONS OF THE PLATES. 



Plate IX. AMPHIPAPPUS FREMONTII, page 17. 



Fifi. 1. A liead of flowers, ningnified. 



2. The ray-flower, more magnified. 



3. Pappus of the same, laid open, highly magnified. 



4. A disk-flower, moderately magnified. 



5. Pappus of the same, highly magnified. 



C. Branches of the style, showing the stigmatic lines. 



Plate X. SARCODES SANGUINE A, page 18. 



Fig. 1. Plan of the flower. 



2. A flower, moderately magnified. 



3. Front view of a stamen. 



4. The same, seen from the inside ; the anther cut transversely to exhibit 



its two cells : both more magnified than fig. 1. 



5. Vertical section of a magnified flower, showing all the organs in their 



relative situations. 



6. The pistil, with one of the stamens, magnified. 



7. Transverse section of the ovary. 



8. An ovule, highly magnified. _, 



9. A ripe seed, more magnified. 



10. Vertical section of the same. 



1 1 , The embryo detached, very highly magnified. 



