96 Mr. Geyer's Plants of Illinois and Missouri. 



29. Linum rigidum, Pursh. 



30. Malva Honghtonii, Torr. & Gr. Intermediate between Mal- 

 va and Sphceralcea ; the carpels being 1-seeded as in Malva, but 

 2-valved as in Sphseralcea. The carpels separate mostly from the 

 receptacle and from one another before opening. 



31. Psoralea floribunda, Nutt. 



32. Amorpha canescens, Nutt. 



33. Petalostemon violaceum, Michx. 



34. Astragalus trichocalyx, Nutt. ? Probably a different spe- 

 cies, but as I am unable to compare original specimens of Nut- 

 tail's plant, I am at present unable to decide. This species grows 

 from a very strong fusiform ligneous root, in many cespitose stems, 

 in the rich prairies and on grassy hills near St. Louis, (in Illinois,) 

 and through the whole state of Missouri. It flowers in April and 

 in beginning of May. The corolla is ochroleucous, with a bluish 

 tip to the carina; the unripe legumes are succulent and edible, 

 and when boiled resembling young beans in taste. 



35. Desmodium sessilifolium, Torr. & Gr. 



36. Lespedeza capitata, Michx. 



37. Crotalaria sagittalis, Linn. 



38. Spiraea lobata, Murr., and 



39. Sanguisorba Canadensis, Linn. New localities for these 

 plants, and probably the southern limit for them in the Mississippi 

 valley. 



40. Cratasgus coccinea, Linn. var. ? mollis, Torr. & Gr. 



41. Crataegus tomentosa, Linn. 



42. Rhexia Virginica, Linn. 



43. Callitriche vernalis, Kiitzing, (in Linnaea, VII, 178.) One 

 of the species of this genus common to America and Europe, and 

 by most authors confounded with several others under the name 

 of C. verna, Linn. It is well distinguished by the four angles of 

 the small fruit being carinate ; most other species having broadly 

 winged angles and larger fruits. 



44. Cicuta maculata, Linn. '50. Hedyotis purpurea, var. 



45. Thaspium cordatum, Torr. & Gr. 



Torr. & Gr. 51. Liatris cylindracea, Michx. 



46. Galium pilosum, Ait. 52. Liatris pycnostachya, Michx. 



47. Spermacoceglabra,Michx. 



48. Diodia teres, Walt. 



49. fled y otis minima, 



53. Aster sericeus, Vent. 



54. Aster turbinellus, Lindl. 



55. Aster azureus, Lindl. 



Torr. & Gr. 56. Aster sagittifolius, Willd. 



