ILLUSTRATIONS. IX 



Page. 



Fro. 4. Hiraea polybotryu Juss - 139 



5. Mimosa lacerata Rose 141 



6. Pseudosmodingium multiflorwm Rose _ - . - 143 



7. Flowers of Polianthes tuberosa L 154 



8. Flowers of Poliantkes sp . - - 154 



9. Flowers of Polianthes sp - - - - — - - - 154 



1 0. Flowers of Bravoa gemiit (flora Lex - 154 



11. Flowers of Prochnyanthes viridescens Wats - - 155 



12. Flower of Manfreda virginica Salisb --- 155 



13. Manfreda seedling - 155 



1 4. Manfreda bulb, cross section 155 



15. Flower of Agave americana L . . 156 



16. Agave seedling .. !56 



IT. Nissolia urislizeni Gray . _ - - - - 158 



18. Nissolia schottii (Torr.) Gray - 159 



19. Nissolia platycaly.v Wats - 159 



20. Nissolia pringlei Rose . _ - 160 



21. Nissolia diversifolia Rose - - 1"" 



22. Nissolia hirsuta DC - 161 



23. Nissolia dodgei Rose 161 



24. Nissolia multiflora Rose . . - 161 



25. Nissolia laxior (Robinson) Rose - - 162 



26. Nissolia nelsoni Rose - 1^ 



27. Nissolia fruticom Jac<[ . . . . 163 



28. Anoda hastata Cav - 1'* 



2S>. Periptera periptera (Sims) Rose - 1~3 



30. G von ovia longijlora Rose - : I 98 



31. Huamuchil, Pithecolobium dulce Benth - -16 



32 Cereus pecten-aboriginum Engelm . . . - - «54 



33. Muhlenbergia Jilipes, transverse section of leaf _ - 286 



34. Muhlenbergia Jilipes, ventral epidermis of leaf - 286 



35. Muhlenbergia fllipes, dorsal part of leaf blade 286 



36. Muhlenbergia Jilipes, portion of mestome bundle 287 



37. Chlorispetraea, leaf blade - - 29t > 



38. Chloris petraea, ventral portion of leaf blade 291 



39. Chlorispetraea, large mestome bundle from leaf blade . 291 



40. Chloris petraea, three small mestome bundles from the blade 292 



41. Yucca aloifolia, leaf surface - 29 3 



42. Yucca aloifolia, a stoma ■-- 2 °3 



43. Quercus virginiana, stellate hair from dorsal leaf surface. . 295 



44. Croton maritimus, hair from dorsal leaf surface . . ■ - 296 



45. Physalis viscosa, branched hair from leaf . - - 298 



46. Tissa marina , glandular hair from leaf margin 302 



47. Lippia nodijfora, stomata and hairs 304 



48. Iva frutescens, hair from ventral leaf surface 308 



49. Borrichia frutescens, leaf section - 3° 9 



50. Borrieh ia frutescen s, leaf hairs 309 



51. Inner slope of high dunes at Cape Henry, Va., showing advance on 



The Desert " 



333 



52. Incursion of the sand on inland vegetation near Cape Henry. Va . - 334 



53. Incursion of the sand on inland vegetation near Cape Henry. Va 335 



54. ■ ' The Desert " from the high dunes at Cape Henry. Va 336 



55. Terrace along the shore near Virginia Beach; sand above, clay 



below 3?7 



