687 Rydberg : Studies on the Rocky Mountain Flora 



Involucre 5-6-flowered : perianth elongated funnelform. I. Q. niultiflortim . 



Involucre l-flowered : perianth opencampanulate. 2. Q. laeve. 



I. QuAMOGLiDiON MULTiFLORUM Torr.; Gray, Am. Journ. Sc. II. 



15: 321. 1853 



Oxybaphns imtltiflorwnToxx. Ann. Lye. N. Y. 2 : 237. 1828. 



Nyctagiiiia Torreyana Choisy ; DC. Prod. 13- : 430. " 1849. 



Mirabilis umltiflora A. Gray; Torr. Bot. Mex. Bound. 173. 

 1859. 



Choisy, who had not seen any specimens of this species and 

 who believed that it had distinct bracts, referred it to Nyctaginia ; 

 but it is evidently congeneric with and closely related to Mirabilis 

 triflora Benth., the type of QuamoclidioJi. Q. nuiltiflonun ranges 

 from Colorado and New Mexico to Arizona and California. 



2. Quamoclidion laeve (Benth.) 



Oxybaplius laevis Benth. Bot. Sulph. 44. 1844. 



0. glabrifoliiis var. crassifoliiis C\id\?>y \ DC. Prod. 13^: 431. 

 1849. 



O. glabrifoliiis ToYYO-Y, Pac. R. R. Rep. 4: 131. 1857. Not 

 Vahl. 



Mirabilis Calif oniica A. Gray; Torr. Mex. Bound. Surv. 173. 

 1859. 



O. Calif ornicus Benth. & Hook. Gen. 3: 4. 1880. 



This species has quite often been included in Oxybaphns, i. c, 

 Allionia, and often in Mirabilis. Professor Heimerl, in his treat- 

 ment of the Nyctaginiaceae in Die iiaturlichen Pflanseufaniilicn, 

 vcitYgcs Oxybaphus into Mirabilis ; but associates this species with 

 the one-flowered species of Allionia. 



It is evident that if Allionia is to be treated as a distinct genus, 

 Q. laeve can not be included in the latter genus for it lacks the es- 

 sential characters, viz., the ribbed fruit and the enlarging and mem- 

 branous involucre. It is evidently closer related to Quamoclidion 

 than any other genus. The only important difference between it 

 and the typical species is the open short perianth and the flowers 

 solitary within each involucre. The species ranges from Utah 

 to Arizona and California. 



4. Allioniella gen. nov. 

 Bracts five, united into a gamophyllous viscid rotate involucre, 



