86 STUDIES IN THE VEGETATION OP THE STATE 



Panicum capillarc, and Polygonum pennsijlvanicum are 

 adventitious or ruderal elements. With one exception, Convoi- 

 vulas senium, whicli is perennial by rootstalks, all are hapa- 

 xanthous herbs, Lactuca ludoviciana being dicyclic. Con- 

 volvulus sepmm is an inhabitant of the meadows, where it 

 averages abont 30 to the quadrat. The large, white flowers 

 of the bindweed are conspicuous objects among the facies, 

 the vines being mostly hidden from view. Aniaranthus tor- 

 reyi and Polygonum pennsylvanicum occur sparsely in the 

 wet meadow. Panicum capillare grows on the mounds of 

 the pouched gopher. With the close of maturation, the glo- 

 bose panicle becomes free and rolls about over the prairies. 

 Cassia chamaecrista is undoubtedly an intruder from the 

 section road. It is also found in quantity along the eastern 

 margins of the wet meadow. During maturation the pods 

 split open, thus exposing the seeds for dissemination. 



EI.EMENTS OF THE SEROTINAL FLORAL ASPECT 



Fades 



Andropogon scoparius. Elymus canadensis. 



A. furcatus. Panicum virgatum. 



Bouteloua curtipendula. Spartina cynosuroides. : 

 Chrysopogon avenaceus. 



Principal Species 



Aster multiflorus. Helianthus scaberrlmus. 



Secondary Species 



Aster levis. Carduus altissimus. 



A. azureus. Cuscuta paradoxa. 



A. paniculatus. Euthamia graminifolia, 



A. oblongifolius. Lespedeza capitata. 



A. sericeus. Laciniaria pycnostachya* 



Artemisia gnaphalodes. L. scariosa. 



Ambrosia trifida. Lygodesmia juncea. 



Acalypha virginica. Muhlenbergia racemosa. 



