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DESCRIPTION OF THE PLATES 



263 



PLATE XII. POLYGALA NUTKANA.— Page 49 



A PLANT OF THE NATURAL SIZE. 



. Fig. 1. A floAver laid open; moderately enlarged. Fig, 2. Sepals; a, the upper odd one; 6, 

 a lateral upper one; c, a "wing. Fig. 3. Corolla laid open, showing the stamens; magnified. 

 Fig. 4. An anther, considerably more enlarged. Fig. 5. The pistil; magnified. Fig. 6. A 

 capsule divided longitudinally, showing the pendulous seeds, considerably magnified. Fig. 7. 

 Transverse section of the same. Fig. 8. A seed; more highly magnified. 



PLATE XIII. KRAMERIA CANESCENS.— Page 49. 



A PORTION OP THE PLANT OF THE NATURAL SIZE. 



Fig. 1. Plan of the flower. Fig. 2. A flower bud and bracteoles; somewhat enlarged. 

 Fig. 3. An expanded flower; more enlarged. Fig. 4. The three upper petals. Fig. 5. The 

 two lower fleshy and glandular petals; one an inside view, the other an outside view; the last 

 two figures considerably magnified. Figs. 6-8. Different magnified view^s of a stamen, (fig. 6 

 shows the vertical opening.) Fig. 9. The pistil; moderately enlarged. Fig. 10. The same 

 considerably magnified and divided longitudinally. Fig. 11. Transverse section of the same. 

 Fig. 12. The ovules, or rather young seeds detached. Fig. 13. A seed; considerably magnified. 

 Fig. 14. A fruit of the natural size. Fig. 15. The upper part of one of the barbed prickles 

 of the fruit pretty highly magnified. 



PLATE XIV. PICKERINGIA MONTANA,— Page 51. 



A BRANCH OF THE NATURAL SIZE. 



Fig. 1. The vexillura. Fig. 2. One of the wings. Fig. 3. A keel-petal. Fig. 4. A flower 

 with part of the calyx and the corolla cut away. The preceding figures moderately enlarged. 

 Fig, 5. Part of a stamen; considerably magnified. Fig. 6. The pistil, equally maginfied, and 

 the ovary longitudinally divided. Fig. 7. An immature seed; more highly magnified. 



PLATE Xy. HOSACKIA GRACILIS.— Page 54. 



A PLANT OP THE NATURAL SIZE, IN FLOWER AND FRUIT. 



■ 



Fig. 1. A flower somewhat enlarged. Fig, 2. Separate petals; magnified; a, the vexillum; 

 h, one of the wings; c, one of the keel petals. Fig. 3. A seed; considerably magnified. 



PLATE XYL ASTRAGALUS (PHACA) LEU COPSIS.— Page 56. 



I A. UPPER PART OP THE PLANT OF THE NATURAL SIZE. B. A PEDUNCLE BEARING MATURE PODS. 



Fig. 1. A flower with the petals removed; moderately enlarged. Fig. 2. Separate petals; 

 a, the vexillum; h, one of the wings; c, the keel. Fig. 3. The stamens and pistil; more mag- 

 nified. Fig. 4. The pistil with ita stipe; equally magnified. Fig. 5. The ovary laid open; 

 more magnified. Fig. 6. A very young seed; considerably magnified. Fig. T. Transverse 

 section of a pod, of the natural size. Fig. 8. A seed; considerably magnified. 



