17 



Notes on some Californian Green Algae. — An examina- 

 tion of Collins' recent work on the green algae (F. S. Collins, 

 "The Green Algae of North America," Tufts College Studies 

 2: 79-480. pi. 1-18. 1909) showed that two very characteristic 

 species which have been collected in central California were not 

 recorded for this state. 



The first species is a Spondylomoriim , probably S. quaternarium 

 Ehrenb., the only recognized species of the genus, of which there 

 seems to be no previous record for America. According to Wille 

 (Volvocaceae, Engler & Prantl, Die Natiirlichen Pflanzenfamilien, 

 i^: 40. 1890), this species occurs only in Europe and Asia. 



In 1896, Dr. W. R. Shaw, then instructor at Stanford Uni- 

 versity, collected at Pacific Grove, near Monterey, a quantity of 

 this species. He made a number of slides, three of which are now 

 in the collection of the University. The specimens agree in all 

 respects with the figures and descriptions of S. quaternarhim, but 

 are somewhat smaller than the dimensions given by De-Toni in his 

 Sylloge Algarum, where the size is stated to be 36-75/x. The 

 largest Californian specimens hardly exceed 40/^ in length. No 

 further collections of Spondylomorum have come to my attention. 



The second alga to be noted is Pithophora oedogonia (Mont.) 

 Wittrock, This species has been collected several times in Felt 

 Lake, a small body of water some four miles from Stanford Univer- 

 sity. The identification was made by Professor W. A. Setchell. 



The species of Pithophora are for the most part tropical, but 

 several species have been reported from stations in the eastern 

 and central parts of the United States. So far as I know, the 

 genus has not before been recorded from the Pacific Coast. 



Douglas H. Campbell. 



Stanford University, California. 



REVIEWS 



Hough's Leaf Key to the Trees 



A little book of interest to teachers that has appeared recently 

 is Mr. R. B. Hough's Leaf Key to the Trees.* 



*R. B. Hough. Leaf Key to the Trees of the United States and Canada, and a 

 Botanical Glossary, pp. 1-49. Published by the author, at Lowville, New York, 

 Sept.. 1910 Price S.75 



