Floristik, Geographie, Systematik etc. 573 



71 textfigures. The chapter devoted to the wild flowers is on ecolo- 

 gical lines. An account of the forest formations is followed by a 

 descriptive treatment of the trees, with analytical keys. Trelease. 



Rydberg, P. A., ^/oö^^ace^e. (North American Flora. XVII. p. 67— 71. 

 June 30, 1909.) 



Halophila (3 sp.), Vallisneria (2 sp.) and Philotria (6 sp.) 



Trelease. 



Rydberg, P. A., Hydrocharitaceae. (North American Flora. XVII. 

 p. 73—74. June 30, 1909.) 



Thalassia (1 sp.), Hydromystia (1 sp.) and Limnohhim (1 sp.) 



Trelease. 



Rydberg, P. A., Sparganiaceae. (North American Flora. XVII. 

 p. 5—10. June 30, 1909.) 



Sixteen North American species are differentiated in the 

 genus Sparganium: S. chlorocarpum , S. acaide (5. simplex acaiüe 

 ßeeby), and 5. Williamsii appearing as new. Trelease. 



Small, J. K., Alismaceae. (North American Flora. XVII. p. 43—62. 

 June 30, 1909.) 



Alisma (3 sp.), Machaerocarpus n. gen. (1 sp.), Helianthiiim (2sp.), 

 Echinodorus (9 sp.), Lophotocarpus (7 sp.) and Sagittaria (35 sp.). The 

 following new names occur: Machaerocarpus californiciis {Damaso- 

 nium californicurn Torr.), Helianthium parvuluni {Echinodorus par- 

 vidiis (Engelm.), H. nymphaeifolium {Alisma nymphaeifoliumGriseb.), 

 Echinodorus Grisebachii {E. intermedius var. Griseb.), E. Andrieuxii 

 {Alisma Andrieuxii H. & A.), E. tunicatus Small, and Sagittaria lorata 

 (S. natans lorata Chapin). Trelease. 



Small, J. K., AUsmales. (North American Flora. XVII. p. 39. June 



30, 1909.) 



Characterization of the Order, with key to the Families Scheuch- 

 seriaceae, Alismaceae and Butomaceae. Trelease. 



Small, J. K., Hxdrocharitales. (North American Flora. XVII. p. 65. 



June 30, 1909.) '^ 



Characterization of the Order, with key to the Families Elodea- 

 ceae and Hydrocharitaceae. Trelease. 



Small, J. K., Naiadales. (North American Flora. XVII. p. 11. June 



30, 1909.) 



Characterization of the Order, with key to the Families, Zanni- 

 chelliaceae, Cytnodoceaceae, Naiadaceae and Lilaeaceae. Trelease. 



Small, J. K., Pandanales. (North American Flora. XVII. p. 1. June 

 30, 1909.) 



Characterization of the Order, with key to the Families, Typha- 

 ceae and Sparganiaceae. Trelease. 



