172 



MISSOURI BOTANICAL GARDEN. 



by Compositae, with the exception of specimens of Adaca 



alba, the fruit of which is in evidence during the early 



part of the autumn, and Galium Aparinc, G, drcaezans^ 



G. concinnum and G. pilosiim, which continue to clothe the 



banks and shelves, the former on the lower hillside, the latter 



on the upper. Among the Compositae, Eupatorium altissi- 



mum and Solidago latifolia are most prominent. A moss 



Atrichum angustatum, makes its appearance at this time. 



A special feature of a ravine is the creek which finds its 



way through it. In early spring filled to overflowing and even 



frequently inundating its banks, during the summer and fall 



it merely serves as an outlet for the underground drainage 



which never fails though it may be reduced to a minimum. 



Algae, especially Cladophora glomerata, the latter species 



even through the winter, are present during the entire year. 



Besides Bacillariaccac and Desmidiaccae, one meets with 



Gonium pectorale. A species of Phormidium covers the 



stones. In summer and fall Eiighna acus and E. viridis 

 are frequently met with. 



Creek banks. 



The trees occurring on the creek banks are Acer sacchannum , 

 Fraxinus americanaj F. viridis , Ccliis occidentalism Moms 

 rubra, Ulmus americana, Platanus occidentalism Betula nigra, 

 Carpinus caroliniana, Q iiercus alba, Q . coccinea tinctoria, 

 and Q. macrocarpa. The smaller trees and shrubs which 

 find a place here arc Ptclca trifoliata, Rhamnus lanceolata, 

 Staphylea Irijolia, Physocarpus opulifolius, Prunus americana, 

 P. serotina, Sanihucus canadensis, and Viburnum Lentago^ to- 

 gether with Rosa sctigera and Hydrangea arborescens, the 



latter species forming extensive groups. Climbers such as 



Am/pelopsis quinque} alia , Cissus Ampelopsis, Vitis cinerea, 

 F. cordata and V. riparia as well as Rhus Toxicodendron are 

 everywhere, as are the shoots of Smilax herbacea, S. hispida 

 and Tecoma radicans, the latter at least in the more open 



places. 



The spring flora consists largely of rosette forms, the 

 Ranunculaccae and liliaceous group yielding the largest con- 

 tingent. The principal species are Delphinium tricorne, 



r 



