182 



MISSOURI BOTANICAL GAIIDEX. 



and L. Scariola intcgrata, Datura Tatula and Tecoma radlcans 

 never fail. Daucus Carota which, coming from the west, 

 has increased to a remarkable extent during the last five years, 

 sometimes covers extensive tracts. Polanisia graveolens, 

 introduced with the railroad ballast obtained from the Mera- 

 mcc River gravelbars, is met with. Compositae arc always 

 a most striking feature. They are chiefly lidianthus annuus, 



and S. scrotina. 



tegrifoliu 



Cuts. 



He 



railroad, banks, some six feet in height, separate the tracks 



from 



banks 



posed of low growing 



which form spring rosettes, the conditions being strictly 



xerophytic. Striking is 

 dalis aurea. Here and t 



J 



durinsr the sprino- 



to 



to 



months, Cory- 



brambles 



The Ranunculaceae are conspicuous by their absence. 

 Grasses, chiefly Poa pratcnsis and P. compressa, Bromus se- 

 calinus and Elymus canadensis, together with Fragaria vir- 



form 



Hyp 



Sisy- 



Lcgu 



are not infrequent, 

 inatc. Melilotus alba, throwing up tall shoots from its bi- 

 ennial root, is the most striking, especially during the late 

 summer, while the yellow-flowered M. officindis, less tall but 

 more graceful, is not infrequent during the carhcr part of 

 the year. Several species of Desmodium and Trijolium 

 arc frequent. Solanum rostraium and the more abundant 



and more fr 



Millefoli 



Solanum carolinense occur, as well as 

 tennarla plantaginij olia and clumps of Achillea 

 During the fall Compositae of lesser stature 



niultifl 



opsis tripteris, Erigeron canadensis, Silphium 

 and Solidago canadensis. 



ioliu 



Ponds. 



Here and there along the railroad occur shallow ponds 

 led with stagnant water and largely drying out during th( 



