EXPLANATION OF PLATES. 



PLATE 9. FOLIAGK OF GERANIUM. 



Figs. 1-2. G. inaciilutiiin : 1, r;ulical; 2. caiiline. 3. G. ei'iaiUhum : caiiline. 4-5. G. iiici.sum : 4, railic.il ; 5, cauline. 

 6-8 G. Riclianlsonii : (J-7, lailical; 8, cauline. 9. G. Freniontii : five leaves, the upper two radical, the others cauline. 10. 

 G. caespitosum : two leaves, the left-hiiml, radical. H. G. Hernandezii : two cauline leaves. 12. G. .Siljiricuui : cauline 

 leaf. 13. G. Cai'olinianum : two loaves, the upper radical. 14. G. pusillinn: three leaves, the lowest radical and excep- 

 tionally large, the others cauline. 15. G. dissectum : cauline leaf. lij. G. rotundifolium : cauline leaf. 17. G. coluuihinum : 

 cauline leaf. 18. G. niolle : two cauline leaves. 19. G. Robertiaiiuin : cauline leaf. — .\11 reduced one-half. 



PLATE 10. GERANIUM AND ERODIUM. 



Fij;s. 1-11. Geranium : 1, G. Ricliardsonii; 2, G. Curolinianuin ; 3, G. pusillum; 4, G. niaculatuni; 5, G. nioUe; (5, (J. caes- 

 pitosum; 7, G. columbinum; 8, G. erianthum ; 9, G. rotundifolium (the summit of the hcaU a little too short); 10, G. 

 Robertianum; 11, G. incisuni. — All X 2. 



Fijis, 12-18. Erodium : 12, K. macrophyllnm, two leaves, carpel and seed; 13, E. Texanum. three leaves, carpel, ami 

 seed; 14, E. mal.achoides, two leaves, carpel, and seed; 15, E. ciconium, leaf; 16, E. botrys, three leaves; 17, E. moscha- 

 tnm, leaf, carpel, and seed; 18, E. cicutarinni, leaf, car|)el, and seed.— Leaves reduced one-half; carpels X 2; seeds X 5. 



PLATE 11. OXALIS. 



Fig. 1. O. dichondrfefolia: leaf and seed (the latter surrounded by its outer envelope). 2. O. Berlandicri : leaf and 

 seed. 3. O. Wrightii : leaf and seed. 4. O. corniculata : leaf ; a, stipules of two leaves (magnified). 5. O. coriuculata, 

 var. macrantha: leaf. 6. O. recurva: leaf. 7. O. acetosella: leaf and seed. 8. O. acetosella, var. Oregana : leaf. t). O. 

 trilliifolia: leaf and seed; a, cross-section of seed. 10. O. violacea: leaf; a, two leaflets of the common form of the prai- 

 rie states. 11. O. divergens : leaf. 12. O. latifolia: two leaflets. 13. O. vespertilionis : two leaflets. 14. O. decaphylla : 

 three leaflets and seed. — Leaves reduced one-fourth; seeds X 20. 



PLATE 12. SEEDS OF GERANIUM AND IMPATIENS; FRUIT OF LIMNANTHES AND FLOERKEA. 



Figs. 1-14. Geranium: 1, G. iucisum; 2, G. Richardsonii; 3, G. caespitosum; 4, G. rotundifolium; 5, G. macnlatum; fi, 

 G. Carolinianum; 7, cross-section of same; 8, G. Carolinianum, var. Te.xanum; 9, G. columbinum; 10, G. pusillum. 

 11-12, G. Robertianum: 11, detached segment of ovary; 12, seed. 13-14, G. moUe : 13, seed, 14, the same in segment of 

 ovary. 15. Impjitiens pallida: o, cross-section. 10-19. Lirananlhes : lfi-17, L. Douglasii ; «, cross-section ; 18, L. Ma- 

 couuii; 19, L. alba. 20. Floerkea proserpinacoides.— 1-14, X 20; 16-20, X 10. 

 (104) 



