400 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: 



Duranco: Durangoard vicinity, 189(5, Palmer 595; barren hills about Tlahualilo, 



alt. 1,000 meters, August 27, 1905, Pittier 486. 

 Chihuahua: Vicinity of Chihuahua, alt. 1,300 meters, May, 1908, Palmer 194; 

 Santa Eulalia Plains, July 24, 1885, Wilkinson; near Chihuahua, 1886, 

 Pringle 1062. 

 Coahuila: Saltillo and vicinity, April, 1898, Palmer 811; near Saltillo, Novem- 

 ber, 1902, Palmer 288. 

 Tamaulipar: Nuevo Laredo, September 28, 1897, Rose 3078. 

 Sonora: MacDougal Crater, Pinacato Mountains, November 14, 1907, MacDougal 

 30; rocky hill near Hermosillo, March 4, 1910, Rose, Standley 6c Russell 

 12353. 

 Baja California: Signal Mountain, May 6, 1894, Schoenfeldt 2952; Los Angeles 

 Bay, 1887, Palmer 100; Cucopa Mountains, April 5, 1905, MacDougal 144; 

 Agua Verde, 1911, Rose 916. 

 Nuevo Leon: Monterey, June 6 to 8, 1910, Hitchcock. 

 Allionia malacoides was described from specimens collected at Magdalena Bay in 

 Baja California and it is no t improbable that it is either specifically or subspecifieally, 

 distinct. The disposition of the specimens listed here is far from satisfactory to the 

 author. It is certain that more than one form is represented, but with the material 

 at hand it seems impossible to distinguish them definitely. Some of the plants have 

 small, thick leaves, while others have larger, thinner ones. The fruit is variable in 

 color and in form, especially in the number, shape, and size of the teeth. The size 

 of the perianth varies considerably. 



In Coahuila and San Luis Potosi the plant is known under the names of yerba de la 

 hormiga, yerba de buendia, and yerba del golpe. The dried plants are sold in the markets 

 of some of the cities to be used in the form of a hot decoction for the cure of diarrhoea. 



2a. Wedeliella incarnata villosa (Standley) Cockerell, Torreya 9: 167. 1909. 



Wedelia incarnata villosa Standley, Contr. Nat. Herb. 12: 333. 1909. 



Type locality, "Mesas a::xl foothills in Arizona." Type collected in 1881 by C. G. 

 Pringle. 



Specimens examined: 



Chihuahua: Mexican Boundary line near Whitewater, June 18, 1892, Mearm 

 361; same locality, June 20, 1892, Mearns 368. 



13. NYCTAGINIA Choisy. 



Nyctaginia Choisy in DC. Prodr. 13 z : 429. 1849. 



Type species, Nyctaginia capitata Choisy. 



A genus of two species, only one of which is known from Mexico. 



1. Nyctaginia capitata Choisy in DC. Prodr. 13 2 : 429. 1849. 



Boerhaavia aggregata Pa von; Choisy, loc. cit., as synonym. 



Boerhaavia capitata Heiraerl, Jahresb. Oberrealsch. Fiinfhaus 23 : repr. 28. 1897. 



Type locality, "In Texas apud S.-Antonio de Biscar." Type collected by Ber- 

 landier. 



Specimens examined: 



Chihuahua: Gallejo Springs between El Paso and Chihuahua, 1846, Wislizenuslll. 

 Coahuila: Saltillo, 1848, Gregg; vicinity of Saltillo, June, 1898, Palmer 202; 



near Saltillo, November, 1902, Palmer 280; Sabinas, May 21, 1902, Nelson 



6761. 

 Nuevo Leon: Monterey, Edwards. 

 Durango: Mapimi, October, 1898, Palmer 545; Santiago Papasquiaro, 1896, 



Palmer 447; Papasquiaro, August 7, 1898, Nelson 4668; El Oro, August 15, 



1898, Nelson. 



