LIST OF ILLUSTEATIONS. 



Plate I.— A. ASTRAGALUS FILIFOLIUS. 



Pagf?. 

 Figure 1. Pistil enlarged. 2. Cross section of the ovary enlargod. 3. Legume transversely divided. 4. Same 



longitudinally divided ..... . 3S 



B. ASTRAGALUS BISULGATUS. 



FiGUBK 5. Fruit with a leaf, &c. C. Fruit, with the calyx, &e. , transversely divided, enlarged to thrice the natural 



size 38 



Plate II.— MUSENIUM DIVARICATUII. 



FiGURK 1. Vertical section of a flower. 2. Fruit. 3. The same, with the mericarps separating. 4,5. Cross sections 



of the fruit and seeds. The details variously magnified . 33 



Plate IIL— EN DOLEPIS SUCKLEYI. 



Figuhe 1. Staminate flower. 2 Vertical section of the same, with the lobes of the calyx inflexed 3. Pistillate 

 flower, with the involucre entire. 4. Same, with one side of the closed involucre cut away. 6. A 4-leaved 

 calyx of a pistillate flower 6. Pistillate flower with its 3-leaved calyx, the involucre removed. 7 Pistil, with 

 its ovary divided. 8. Fruit in its involucre. 9. Same, with one side of the involucre cut away. 10. The seed 

 with its funiculus ; the micropyle has l)Bcome superior. 11. Embryo detached The details all variously mag- 

 nified 43 



Plate IV.— OBIONE SUCKLEYANA. 



FiGUEK 1. Staminate flower spread open. 2 Pistillate flower in its involucre. 3. Same vertically divided. 4. Fruit 

 in its involucre. 5. Cross section of the same. 6. Longitudinal section of the same. 7. The seed vertically 

 divided. Details variously magnified 43 



Plate V.— ASTRAGALUS (HOMALOBUS) SEROTINUS. 



FiGcnE 1. — Vexillum, wing, and a keel petal. 2. Stamens, &c. 3 Calyx and pistil. 4. Legume transversely 



divided, &c. 'I"he details magnified '. 47 



Plate VI.— OROBUS LITTORALIS. 



Figure 1. Vexillum, wing, and a keel petal. 2. Calyx. 3. Stamens. 4. Pistil. 5. Inner face of the style. 



6. Legume. 7. Same with one valve removed. All the details except 6 and 7 enlarged ... 54 



