RvDBERG ; Some Generic Segregations 275 



1. 0. deliciosus (James); Rubus dcliciosns James; Torr. Ann, 



Lye. N. V. 2: 196. 1828. 



2. 0. Neo-Mexicanus (A. Gray) ; Rubus Nco-Mcxicanus A. Gray, 



PI. VVri^rht. 2: 55. 1S53. 



III. A similar inconsistency we find in the Loasaceae, where the 

 genus Mcntzelia as it is represented in United States is composed 

 of at least four distinct groups deserving generic rank * with just as 

 good right as several other recognized genera in the family. 

 The principal distinguishing characters are : 



Placentae with horizontal lamellae between the seeds ; these in 2 rows. 



Filaments 3-cleft at the apex, the middle tooth bearing the anthers, the lateral 



teeth cuspidate ; seeds angled or with folds, not winged ; annuals. 



Bicuspidaria. 



Filaments not cleft ; seeds very flat, more or less winged ; perennials. 



Touterea. 

 Placentae without lamellae ; seeds usually prismatic. 



Placentae slender, filiform ; ovules in one row, 10-40 ; seeds minutely muricate, 

 not striate ; filaments free or nearly so. Acrolasia. 



Placentae broad, band-like ; ovules in 1-2 rows, few ; seeds distinctly striate, 

 often rugose ; filaments at the base united with the petals into a ring. 



Afenlzelia. 



Bicuspidaria (S. Wats.) gen. nov. 



Mentzclia § Bicuspidaria S. Wats. Proc. Am. Acad. 20 : ^dj. 



1885. 



Annuals with rather large flowers. Petals 5, free; stamens 

 80-130, dilated, 3-cleft at the apex, the middle tooth bearing 

 the anthers ; placentae with a vertical wing and horizontal la- 

 mellae between the ovules and seeds ; these i 5-40 in 2 rows on 

 each placenta ; capsule cylindric, inflated, sessile, thin-walled; seeds 

 irregular, angled or with folds, not winged. 



The first of the following species is taken as the type. 



1. B. tricuspis (A. Gray); Mcntzelia tricuspis A. Gray, Am. 



Nat. 9 : 271. 1875. 



2. B. involucrata (S. Wats.) ; Mcntzelia involucrata S. Wats. 



Proc. Am. Acad. 20: 367. 1885. 



3. B. hirsutissima (S. Wats.); Mcntzelia hirsiitissiuia S. Wats. 



Proc. Am. Acad. I2 : 252. 1877. 



* It may be that the other three sections of Urban and Gilg, viz. , Micromentzelia, 

 Octopetaleia and Dendromenlzelia should also be treated as genera ; but better knowl- 

 edge is needed. 



