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Muhlenbergia, Volume 5 



The lower section of the arroyo extends from the Victoria 

 bridge to its junction with the Santa Ana river, at which point 

 the altitude is about 800 feet above sea level. The arroyo in 

 this section is shallower and narrower than the middle section, 

 and for a short distance is merged into the river valley proper. 

 In this section, too, the original vegetation, where it has not 

 been quite destroyed by cultivation, is being gradually replaced 

 by a series of plants of alkali resisting character, owing to the 

 seepage of water from the irrigated mesas collecting along the 

 floor of the arroyo, rendering portions of it too marshy to culti- 

 vate, and the continual evaporation of this water leaves an ever 

 increasing deposit of alkaline matter in the soil. The large per- 

 centage of introduced alkali resisting plants make an interesting 

 feature of the list for this section of the arrovo. 



Equisetum Funstoni 

 Typha latifolia 

 Andropogon halepensis 

 Agrostis stolonifera 

 Chaetochloa glauca 

 Distichlis spicata 

 Ely m ns glaucus 

 Lolium perenne 

 Lolium temnlentuni 

 Paspalum distichum 

 Panicum saiguinale 

 Polypogon littoralis 

 Sporobolus asperifolitis 

 Cyperus esculentus 

 Cyperns inflexus 

 Cyperus laevigatus 

 Cyperns melanostachys 

 Eleocharis acicularis 

 Eleocharis capitaia 

 Eleocharis palustris 

 Scirpus ( Uneyi 

 Scirpus lacustris occidentalis 

 Juncus bufonius 



Juncus mexicanus 

 Juncus phaeocephalus 

 Sisyrinchium bellum 

 Anemopsis californica 

 Populus Fremontii 

 Salix lasiandra 

 Salix argophylla 

 Urtica holosericea 

 Phoradendron villosum 

 Eriogonum Thurberi 

 Polygonum aviculare 

 Polygonuin lapathifolium 

 Atriplex seinibaccata 

 Suaeda Torrtyana 

 Suaeda minutiflora 

 Monolepis Nuttalliana 

 Nitrophila occidentalis 

 Salicornia subtenninalis 

 Salsola tragus 

 Tissa marina 

 Clematis lasiantha 

 Ranunculus cymbalaria 

 Lepidium nitidum 



