60 RvDBERG : Rocky Mountain flora 



Nearest related to 6'. grossnlariaefolia but the leaf-blades are 

 rhombic in outline and cleft only half way down, and the terminal 

 lobe is decidedly acute. On account of the leaf-form it may be 

 mistaken for S. Munroana, but the flowers are smaller, the leaves 

 more deeply divided, the fruit is smaller, the carpels less reniform, 

 and the seed without filiform attachment. 



Utah: Wahsatch County, near Midway, July 6, 1905, Carlton & 

 Garrett 66gi (type, in herb.^N. Y. Bot. Gard.); Fish Lake, around 

 Twin Creeks, Aug. 8, 1905, Rydherg & Carlton /'62/. 



There is a group of plants in Sphaeralcea, however, which 

 differs from the rest not only in habit but also in the character of 

 the fruit. The carpels are not, as in the typical Sphaeralcea, 

 divided into a lower portion, reticulate on the faces and enclosing 

 the seeds, and an upper smooth and empty portion; the whole 

 carpel is in this group smooth and hirsute. Dr. Greene* took out 

 this group and made a new genus under the name of Illiamna. I 

 think that this was unnecessary, for the plants are evidently 

 cogeneric with the West Indian Phyniosia, usually also merged 

 in Sphaeralcea. If the two genera should be merged, the name 

 for the genus would be Phymosia, for it is the older of the 

 two. The species to be renamed under Phymosia are the following: 



Phymosia acerifolia (Nutt.) Rydb. 

 Sphaeralcea acerifolia Nutt.; T. & G. Fl. N. Am. i: 228. 1838. 

 Illiamna acerifolia Greene, Leaflets i: 206. 1906. 



Phymosia rivularis (Dougl.) Rydb. 

 Malva rivularis Dougl.; Hook. Fl. Bor.-Am. i: 107. 1831. 

 Sphaeralcea rivularis Torr. in Gray, Mem. Am. Acad. 4 : 23. 1849. 

 Illiamna rivularis Greene, Leaflets i : 206. 1906. 



Phymosia grandiflora Rydb. 

 Sphaeralcea grandiflora Rydb. Bull. Torrey Club 31: 565. 1904. 

 Illiamna angulata Greene, Leaflets i: 206. 1906. 



Phymosia Crandallii R>db. 

 Sphaeralcea Crandallii Rydb. Bull. Torrey Club 31: 564. 1904. 

 * Leaflets i: 205-207. 1906. 



