104 Muhleiibergia, Volume 5 



Trifolium oreganum Howell • 

 The original description in Erythea 1: no. 1893, states 

 that the ovary is glabrous. An examination of type number 

 material by us shows plainly that the upper portion of the pod 

 is strongly pubescent. The apiculation terminating the vexil- 

 1 11 m wings and keel is especially prominent in this species. In 

 the wings it is almost 2 mm. long. 



Trifolium shastense House, Bot. Gaz. 41: 337. 1906. 

 We are of the opinion that T. shastense is a form of T. ore- 

 ganum. An examination of several sheets of H. E. Brown's no. 

 365, mentioned as typical in the original description, shows no 

 pubescence on the upper sides of the leaflets. The original de- 

 scription says "silky pubescent above and beneath." The vex- 

 illum appears more slender and the leaflets are narrower than in 

 T. oregannm. More specimens and field studies in the regie n 

 of the type are necessary before definite conclusions can be made 

 in regard to the validity of the species. 



Trifolium Covillei House, Bot. Gaz. 41: 33/. 1906. 

 We saw the plant referred to at the U. S. National Herbar- 

 ium when Mr. House was working with the clovers, but we haw- 

 no specimens like it, nor have we any duplicates of the type 

 collection. 



Nevada Agricultural Kxperiment Station. 



New Combinations 



Hesperonia liinosa (A. Nelson) Standley 



Mirabilis limosa A. Nelson, Bot. Gaz. 47: 426. 1909. 

 Hesperonia glntinosa Standley, Cont. U. S. Nat. Herb. I'i: 



365. 1909. 

 Mirabilis glntinosa A. Nelson, Free. Biol. Soe. Wash. 17: 



92. 1904. Not Kuntze, 1898. 



Hesperonia limosa retrorsa (Heller) Standley 



Mirabilis retrorsa Heller, Muhlenbergia *i: 193. 1906. 

 //. glntinosa retrorsa Standley, Cont. U. S. Nat. Herb. 1*4; 

 365. '9<>9- 

 Hesperonia limosa gracilis Standley 



H. glutinosa gracilis Standley, Cont. U. S. Nat. Herb. 12: 

 365. 1909. Paul C. Standley. 



