90 ERYTHEA. 



tion ditch, and were apparently not indigenous. Dr. Davidson's 

 and Professor McCIatchie's plants were collected by roadsides or in 

 cultivated grounds. There can be no doubt of the exotic character 

 of these plants. I reduce Dr. Vasey's species to E. pilosa on the 

 authority of Dr. Scrihner, who regards it as identical with Austra- 

 lian specimens referred to that species by Bentliam. It is the form 

 known as E. parvijlora, Trin. 



NoLiNA BiGELOVii, Watson, Proc. Ara. Acad. xiv. 246. I 

 have specimens, with fruit and flowers, of this species, collected by 

 Mr. J. W. Lester, in the foot-hills south of Corona (South River- 

 side). The seeds ai-e ovate, about 5 cm. long, roughish and light- 

 colored. The occurrence of any Nolina in this region was not to be 

 looked for, or if any, one would rather expect N. Parryi. Yef the 

 occasional appearance of desert plants in the intramontane region 

 is far from unprecedented. 



Lemna gibba, Linn, Sp. PI. 970. Professor McClatchie has 

 reported this species* from several stations near the coast. To 

 these may be added an interior one, a small stream west of Mound 

 City, in San Bernardino Valley. 



Lemna minima, Philippi, Linnsea, xxxiii. 239. In ditches and 

 in pools of a slow, shallow stream in swamps a mile south of San 

 Bernardino. 



WoLFFiELLA OBLONGA, Hegelmaicr in Engler Bot. Jahrb. 

 xxi. 308. 



WoLFFiELLA LiNGULATA, Hegelmaier, 1. c. 



These two minute plants occur at the last-mentioned station, 

 entangled in an abundant growth of Lemna minor, Linn., and L. 

 minima, Philippi. If some of this lemnaceous material be floated 

 in a pan of water, it is easy to separate the slender fronds of W. 

 oblonga from the broad ones with upcurved edge of W. Ungulata. 

 But when this has been done, there remain a number which it is 

 difficult to assign to either species with entire certainty. So that^ 

 while typical forms are perfectly distinct, it may be questioned, if 

 further knowledge may not show that in reality they are extreme 



*Eryth.iv. 9. 



