STANDLEY— ALLIONIACEAE OF MEXICO. 423 



6. Boerhaavia hirsuta Willd. Phytog. 1: 1. 1794. 



Bocrhaavia polymorphs, L. C. Rich. Act. Soc. Hist. Nat. Paris 1: 185. 1792. 

 Boerhaavia caribaea Jacq. Obs. Hot. 4: 5. pi. 84. 1771 . 

 Boerhaavia diffusa hirsuta Kuntze, Rev. Gen. PL 533. 1891. 

 Type locality not ascertained. 



Specimens examined: 



Oaxaca: Tehuantepec, 1910, Orcutt 3014. 



Yucatan: 1895, Gaumer 309; Merida, November 30, 1864, Schott 3; Merida, Feb- 

 ruary 12, 1865, Schott 21. 



Tabasco: San Juan Bautista, 1888, Rovirosa 159. 



Guatemala: Atucatempa, Depart. Jatiapa, alt. 920 meters, April, 1894, 

 Eeyde & Lux 6371; Gualan, January 19, 1905, Deam 393. 



Salvador: Renson 319. 



Panama: Ahorca Lagarto to Culebra, March 9, 1905, Cowell 369. 



7. Boerhaavia Ixodes Standley, sp. nov. 



Perennial from a thick woody root; stems ascending, much branched, 40 cm. long 

 or more, stout, densely glandular-hirsute below, glabrous above; leaf blades ovate or 

 oblong, the lower obtuse, the upper acute, their margins somewhat undulate, thick, 

 paler beneath, glandular-pubescent on both surfaces or almost glabrous, on petioles 

 as long as the blades or shorter; flowers mostly sessile, few in each head, dark red; 

 anthocarp ellipsoidal or clavate, strongly glandular. 



Type in the U. S. National Herbarium, no. 573670, collected in the vicinity of 

 Chihuahua, May 1 to 21, 1908, by Dr. Edward Palmer (no. 193). 



In an earlier paper dealing with this family the writer confused this plant with 

 B. hirsuta, and the specimens have usually been distributed under that name. Doc- 

 tor Heimerl has designated it in the herbarium as a subspecies of B. viscosa, but it 

 is amply distinct from both those species. Compared with the latter it has much 

 more abundant and different pubescence on the lower part of the stem, and the 

 branches of the inflorescence are glabrous rather than glandular. Boerhaavia hirsuta 

 is altogether without glandular pubescence. 



Additional specimens examined: 



Baja California: Palm Valley, May 30, 1888, Orcutt; Santa Agueda, 1890, 

 Palmer 225; Yalle de las Palomas, May, 1883, Orcutt; Socorro Island, 1903, 

 Barhelew 205. 

 Durango: Vicinity of Durango, 1896, Palmer. 



Sonora: Sierra de Alamos, March 14, 1910, Rose, Standley & Russell 12819; 

 about 5 miles below Minas Nuevas, March 12, 1910, Rose, Standley & Russell 

 12671; bed of the Rio de Sonora near Hermosillo, March 6, 1910, Rose, Stand- 

 ley & Russell 12454. 

 State unknown: Near San Pablo, April 20, 1847, Gregg; Cartajena, October, 

 1857, Schott. 

 In addition to these Mexican specimens the following from the southwestern United 

 States have been examined: 



Arizona: Congress Junction, alt. 920 meters, May 4, 1903, Jones; fenced area, 



. Santa Rita Forest Reserve, May, 1903, Griffiths 4369; same locality, June, 



1903, Griffiths 4782; Tucson, April 8, 1892, /. W. Tourney 473a; mesas, May 7, 



1881, Pringle. 



California: San Jacinto Hot Springs, San Diego County, July 4, 1892, Basse 5662; 



plains near the Middle Tule River, alt. 245 to 325 meters, 1897, Purpus 5009. 



8. Boerhaavia wrightii A. Gray, Amer. Journ. Sci. II. 15: 322. 1853. 



Boerhaavia bractcosa S. Wats. Proc. Amer. Acad. 20: 370. 1885. 

 Type locality, "Pebbly hiRs near El Paso," Texas. Type collected by Charles 

 Wright (no. 618). 



Specimens examined: 



Sonora: Papago Tanks, Pinacate Mountains, November 16, 1907, MacDougal 43. 



