58 Rvdbekg : Rocky Mountain flora 



trum; but I believe that that genus should be merged in Sphaeral- 

 cea. Mahastrum coccineum, the type of the genus, has the habit 

 of the typical species of Sphaeralcea. The fruit is also the same 

 except that the empty non-reticulate portion of the carpel is 

 much reduced. M. grossulariaefolium and M. Munroanum with 

 little more developed upper portions have been tossed back and 

 forth between the genera Mahastrum and Sphaeralcea. Six species 

 should be transferred from Mahastrum to Sphaeralcea under the 

 following names. 



Sphaeralcea grossulariaefolia (H. & A.) Rydb. 

 (?) Maha Creeana Graham, Bot. Mag. pi. 36Q8. 1838. 

 Sida grossulariaefolia Hook. & Arn. Bot. Beech. Voy. 326. 1841. 

 Mahastrum grossulariaefolium A. Gray, Mem. Am. Acad. 4: 21. 



1849. 

 Sphaeralcea pedata Torr. Mem. Am. Acad. 4: 23. 1849. 

 Mahastrum. coccineum grossulariaefolium Torr. Stansb. Exped. 384. 



1852. 



Sphaeralcea dissecta (Nutt.) Rydb. 

 Sida dissecta Nutt.; T. & G. Fl. N. Am. 1: 235. 1838. 

 Mahastrum coccineum dissectum A. Gray, PI. Wright. 1: 17, in 

 part. 1852. 



Sphaeralcea coccinea (Nutt.) Rydb. 



Maha coccinea Nutt. Fras. Cat. 1813. 



Cristaria coccinea Pursh, Fl. Am. Sept. 454. 1814. 



Sida coccinea DC. Prod. 1: 465. 1824. 



Mahastrum coccineum A. Gray, Mem. Am. Acad. 4:21. 1849. 



Sphaeralcea elata (E. G. Baker) Rydb. 

 Mahastrum coccineum elatum E. G. Baker, Jour. Bot. 29: 171. 



1 891. 

 Mahastrum elatum A. Nels. Bot. Gaz. 34: 25. 1902. 



Sphaeralcea digitata (Greene) Rydb. 

 Mahastrum coccineum dissectum A. Gray, PI. Wright. 1: 17, in 



part. 1852. 

 Sphaeralcea pedata angustiloba A. Gray, Proc. Am. Acad. 22: 292. 



1887. 



