STANDLEY — ALLIONIACEAE OF MEXICO. 425 



14. Boerhaavia xanti S. Wats. Proc. Amer. Acad. 24: 69. 1889. 



Type locality, "Cape Saint Lucas," Baja California. Type collected by L. J. 

 Xantus in 1859-60 (no. 93). 

 Specimens examined: 



Baja California: Type; same locality, Xantus 92; San Jose" del Cabo, Septem- 

 ber 1, 1890, Brandegee 484; Binorama, 1899, Brandegee. 

 Sonoua: Guaymas, 1887, Palmer 681. 

 Mr. Brandegee's no. 484 matches the type almost exactly. The specimens from 

 Guaymas differ somewhat in having the leaves not black-dotted beneath and larger, 

 less acute, and thinner, while the stems are more villous; they are without fruit. 



15. Boerhaavia alamosana Rose, Contr. Nat. Herb. 1: 110. 1891. 



Type locality, "Hillsides about Alamos," Sonora. Type collected by Dr. Edward 

 Palmer in September, 1890 (no. 714). 



Only the type specimen has been examined. 



The species is closely related to B. coulteri and more and better material is needed 

 of both species to determine their exact status. 



16. Boerhaavia coulteri (Hook.) S. Wats. Proc. Amer. Acad. 24: 70. 1889. 

 Senkenbergia coulteri Hook. f. in Benth. & Hook. Gen. PI. 3: 6. 1SS0. 

 Type locality, Mexico. 



Specimens examined: 



Sonora: Rocky hillside near Hermosillo, March 7, 1910, Rose, Standley & Russell 



12545; Mexican Boundary, Schott. 

 Without definite locality: Doctor Coulter 1425. 

 This last specimen probably is a duplicate type. The publication of the species 

 is very unsatisfactory, the description being so short as to make the name almost a 

 nomen nudum. Coulter's specimens probably came from northern Sonora and very 

 possibly from the region about Hermosillo, as he is known to have collected 

 there. 



17. Boerhaavia purpurascens A. Gray, Amer. Journ. Sci. II. 15: 321. 1853. 

 Type locality, "Stony hills near the copper mines of Santa Rita, New Mexico." 



Type collected by Charles Wright (no. 1725). 

 Specimens examined: 



Chihuahua: Near Chihuahua, 1887, Palmer 1582. 



Sonora: Guadalupe Canyon, August 27, 1893, Merton 2044. 



18. Boerhaavia alata S. Wats. Proc. Amer. Acad. 24: 69. 1889. 



Type locality, "On a small rocky island in Guaymas harbor," Sonora. Type 

 collected by Dr. Edward Palmer in 1887 (no. 332, in part). 

 Specimens examined: 



Sonora: Type; rocky island in the harbor, Guaymas, March 10, 1910, Rose, 



Standley & Rujssell 12616. 



When the writer visited Guaymas in March and again in April none of the plants 



were seen growing, the season being still too dry. The dead plants of the previous 



season, however, were noticed everywhere. This species seemed to be the most 



abundant of all in this locality. 



19. Boerhaavia pterocarpa S. Wats. Proc. Amer. Acad. 17: 376. 1882. 



Type locality, "Apache Pass, Arizona." Apache Pass is in the Chiricahua Moun- 

 tains. The type was collected by J. G. Lemmon in 1881. 

 Specimens examined: 



Sonora: Near Altar, 1904, Griffiths 6887. 



