THE AMERICAN BOTANIST 101 



between Pteridosperms and Ferns appear to be far closer than 

 those between Ferns and any other Pteridophytic phylum." 

 There remain three well co-ordinated groups of Pteropsidans : 



Fern allies or Aspermae 



Conifer allies or Gymnospermae 



True flowers or Angiospermae 



This is by no means original with the writer. It rests 

 upon well known investigations. But it has not been suffi- 

 ciently emphasized, and has not yet found its way into the 

 common texts. It seems necessary therefore once more to 

 call attention to the matter. 



MIDSUMMER FLORA OF TUBA OASIS 



(concluded) 



Rhus triloba Nutt. Skunk-brush. This attractive shrub 

 closely related to the Eastern Rhus aromatica is common in 

 the oasis. The fruits are used by the Indians and the plant is 

 locally known as "squaw-berry." 105 



Sphaeralcea lobata Wooton. Nigger-weed. Common in 

 dryish waste ground. Flowers like diminutive hollyhocks. 113 



Sphaeralcea grossulariaefolia Hook & Arn. Globe Ma-e- 

 LOW. Common in waste ground. 112 



Bpilohiuin Fendleri Hossack. Wieeow^-herb. Common 

 along a rill north of Tuba. This appears to be somewhat out of 

 its range. 109. 



Oenothera ornata A. Nels. Evening Primrose. This 

 plant, plentiful in the orchard at Tuba, has been referred to 

 this species previously collected in Idaho. If the two are iden- 



