tet A 
EXPLANATION OF THE PLATES. 
Prats I. CROSSOSOMA CALIFORNICA.—Pace 63, 
A BRANCH OF THE NATURAL SIZE. 
> i428 Fig. ef A branch with the Faves more fully developed, and the carpels half mature. 
fe 2. Plan of the flow 
“i 3. A sepal. 
4. A petal 
5 and 6. Front and back views of a stam 
7. A flower, longitudinally divided, to ine the insertion of the stamens; all the figures moderately and equally 
enlarged. 
8. Transverse section of an ovary; more enlarged. 
9. An ovule; considerably magnified. 
Prate II, VIOLA SHELTONII.—Pace 67. 
AN ENTIRE PLANT OF THE NATURAL SIZE, 
Fig. 1. Three of the petals ; pert 
6. The pistil; all the figures magnified. 
Puate Ill. THAMNOSMA MONTANUM.—Pace 73. 
TWO BRANCHES OF THE NATURAL SIZE--ONE IN FLOWER, THE OTHER IN FRUIT. 
Fig. 1. Plan of the flower 
2. A separate flower; moderately enlarged. 
. The same, with the calyx and petals removed. 
4. Immature fruit, showing the gynophore or it go of the glandular disk. 
5. Ovary, with one of the carpels ppg vid d, 
6. The same cunieialany divided ; magn 
ified 
9. Seed, ics aeatsy divided ; magnified. 
Prate IV. HOSACKIA INCANA.—Pace 79. 
A PLANT OF THE NATURAL SIZE. 
Fig. 1. The banner, a wing, and one of the keel-petals ; considerably magnified. 
2. Stamineal tube, laid open ; equally magnified. 
3. The pistil, longitudinally divided ; also equally siitigntted. 
4. An ovule ; highly magnified. 
Prats V. SPIRAA MILLEFOLIUM.—Pace 83. 
UPPER PART OF THE PLANT OF THE NATURAL SIZE. 
: Plan of the flower. 
. A petal; magnified. 
: = ome _— magnified. 
4, ; also equally magnified. 
ot 
a9 
5. A separate cael 
