STANDLEY ALLIONIACEAE OF MEXICO. 411 



Although Mirabilis trifiora Benth. was the type of Choisy's genus, in transferring 

 the plant to Quamoclidion he changed the specific name so that his combination was 

 Quamoclidion nyctagineum. 



2. Quamoclidion multiflorum Torr.; A. Gray, Amer. Journ. Sci. II. 15: 321. 1853. 



Plate 77. 



Oxybaphus multifiorus Torr. Ann. Lye. N. Y. 2: 237. 1828. 



Nyctaginia? torreyana Choisy in DC. Prodr. 13 2 : 430. 1849. 



Mirabilis multifiora A. Gray, Bot. Mex. Bound. 173. 1859. 



Type locality, "About the forks of the Platte," Colorado. 



No Mexican specimens of this species have been seen, but it certainly occurs in the 

 Rio Grande Valley near Ciudad Juarez, Chihuahua. It is one of the most ornamental 

 plants of the family, rivaling the related Mirabilis jalapa, and would lend itself well 

 to cultivation. 



The photograph was taken at Agricultural College, New Mexico, by E. O. Wooton 

 and Paul C. Standley. 



3. Quamoclidion froebelii (Behr) Standley, Contr. Nat. Herb. 12: 359. 1909. 

 Oxybaphus froebelii Behr, Proc. Calif. Acad. 1: 69. 1855. 



Mirabilis multifiora pubescens S. Wats. Bot. Calif. 2: 2. 1880. 

 Mirabilis froebelii Greene, Bull. Calif. Acad. 1: 124. 1885. 

 Mirabilis multifiora froebelii M. E. Jones, Contr. Western Bot. 10: 49. 1902. 

 Type locality, " Culta e seminibus a J. Froebel prope Warner'a Ranch lectis." 

 Warner's Ranch was in southern California. 

 Specimens examined: 



Baja California: Between the Tia Juana River and Laguna, June 9, 1894, E. A. 



Mearns 3506. 

 Mexico: No locality given, Doctor Coulter 1327. 



16. HESPERONIA Standley. 



Hesperonia Standley, Contr. Nat. Herb. 12: 360. 1909. 

 Type species, Mirabilis californica A. Gray. 



KEY TO THE SPECIES. 



Fruit spherical. 



Plants scabrate, especially on the leaves and inflorescence 1. II. cedrosensis. 



Plants glandular-pubescent, never scabrate 2. H. heimerlii. 



Fruit oblong or ellipsoidal. 



Plants large and stout; leaves 5 cm. long or less; lobes of the 



involucre narrowly lanceolate 3. II. tenuiloba. 



Plants smaller and more slender; leaves not more than half as 

 large as in the above; lobes of the involucre triangular- 

 lanceolate or ovate-lanceolate. 

 Plants glabrous throughout, or the young leaves with a few 



scattering hairs 4. 77. laevis. 



Plants not glabrous throughout, the stems at least sparingly 

 pubescent. 

 Fruit almost 8 mm. long, narrow; flowers few and con- 

 spicuously pediceled 5. H. oligantha. 



Fruit about 4 mm. long or less; flowers more numerous 

 and on short and stout pedicels. 

 Flowers about 12 mm. long; fruit inconspicuously 



striate 6. II. californica. 



Flowers about 2 cm. long; fruit dark brown, not at 



all striate 7. II. polyphylla. 



