LANCE FLORA OF EASTERN WYOMING 



99 



specimens obtained at the remaining localities were shipped and leaf counts were 

 made in the laboratory. In the following lists the species are shown in the order of 

 dominance at each locality, the numbers referring to the actual number of specimens 

 of each species counted. Species represented by less than 5 specimens are omitted. 



Locality P3853 (280 specimens counted) 



Araucarites longifolia 182 



Pistia corrugata 24 



Menispermites cockerelli 8 



Ficus planicostata 7 



Equisetum sp 6 



Locality PS854 (146 specimens counted) 



Platanophyllum montanum 74 



Salix lancensis 29 



Fraxinus leii 7 



Locality P3855 (57 specimens counted) 



Viburnum marginatum 16 



Sequoia dakotensis 15 



Dryophyllum subfalcatum 5 



Locality P3856 (22 specimens counted) 



Trapa? microphylia 14 



Locality P3857 (193 specimens counted) 



Salix lancensis 43 



Fraxinus leii 35 



Vitis stantoni 34 



Dryophyllum subfalcatum 28 



Sequoia dakotensis 8 



Locality P3858 (42 specimens counted) 



Cercidiphyllum ellipticum 6 



Menispermites knightii 6 



Locality P3651 (88 specimens counted) 



Sequoia dakotensis 44 



Cornophyllum wardii 25 



Locality P3652 (61 specimens counted) 



Vitis stantoni 25 



Viburnum marginatum 7 



Locality P3859 (72 specimens counted) 



Salix lancensis 19 



Dryophyllum subfalcatum 15 



Trapa? microphylla 6 



Nymphaeites dawsoni 5 



Sabalites eocenica 5 



Salix lancensis 5 



Dryophyllum subfalcatum 6 



Ficus? trinervis 6 



Dombeyopsis colgatensis 5 



Grewiopsis saportana 5 



Quercus? viburnifolia 5 



Filicites knowltoni 5 



Viburnum marginatum 6 



Viburnum montanum 6 



Dombeyopsis trivialis 5 



Platanophyllum montanum 5 



Fraxinus leii 5 



Celastrus? taurinensis 5 



Apeibopsis? discolor 6 



Viburnum montanum 6 



Sequoia dakotensis 6 



Viburnum marginatum 5 



On the basis of the above leaf counts, in which a total of 951 specimens were 

 examined and counted, the following species are considered the dominants of the 

 type Lance flora as a whole : 



Araucarites longifolia 

 Platanophyllum montanum 

 Salix lancensis 

 Sequoia dakotensis 

 Vitis stantoni 



Dryophyllum subfalcatum 

 Fraxinus leii 

 Viburnum marginatum 

 Cornophyllum wardii 

 Pistia corrugata 



These 10 species represent about 69 per cent of all the specimens encountered 

 in the collections from the nine locaUties Usted. 



