ROSE AND STANDLEY—PLANTS FROM THE PINACATE REGION. 9 
Eriogonum pinetorum Greene, Muhlenbergia 6: 3. 1910. 
Type locality, ‘Black Range, Sierra County, New Mexico.” 
Paso Blanco, November 6, 1907, MacDougal 2. 
This species has long been confused with Eriogonum abertianum, but is readily 
distinguished from it. Its habit is strikingly different and the calyx is a light pink 
instead of dark red. 
Eriogonum vimineum Dougl.; Benth. Trans. Linn. Soc. 17: 416. 1837. 
Type locality, ‘‘Columbia river. ” 
Pinacate Mountains, at 1,200 meters, November 21, 1907, MacDougal 71. The spec- 
imens appear to belong to this species, although they are not in the best condition 
for determination. 
Rumex hymenosepalus Torr. Bot. Mex. Bound. 177. 1859. 
Type locality, ‘‘Sandy soils from El Paso to the cafions of the Rio Grande.” 
No specimens were collected but it was seen at Walls Well in the Ajo Mountains. 
It is a common southwestern plant whose roots are much used for tanning. 
Atriplex canescens (Pursh) James, Trans. Amer. Phil. Soc. 2: 178. 1825. 
Calligonum canescens Pursh, Fl. Amer. Sept. 370. 1814. 
Type locality, ‘‘In the plains of the Missouri, near the Big-bend.” 
Walls Well, Ajo Mountains, November 8, 1907, MacDougal 4. 
Amaranthus palmeri S. Wats. Proc. Amer. Acad. 12: 274. 1877. 
Type locality, ‘‘At Larkin’s Station, San Diego County, California.” 
MacDougal Crater, Pinacate Mountains, November 14, 1907, Sykes. This is per- 
haps the commonest species of Amaranthus in the Southwest. Very frequently the 
plants occur in such abundance that they are cut and cured for hay. 
Cladothrix lanuginosa Nutt.; Moq. in DC. Prodr. 18%: 360. 1849. 
Alternanthera lanuginosa Moq. op. cit. 359, 1849. 
"Type locality, ‘“Secus Salt-river et Red-river.” 
MacDougal Crater, Pinacate Mountains, November 14, 1907, Sykes 29 and 31. 
Boerhaavia wrightii A. Gray, Amer. Journ. Sci. IT. 15: 322. 1853. 
Type locality, ‘‘Pebbly hills near El Paso.” 
Papago Tanks, Pinacate Mountains, November 16, 1907, MacDougal 43. 
Wedeliella incarnata (L.) Cockerell, Torreya 9: 167. 1909. 
Allionia incarnata L. Syst. Nat. ed. 10. 890. 1759. 
Wedelia incarnata Kuntze, Rev. Gen. Pl. 533. 1891. 
Type locality, Peru. 
MacDougal Crater, Pinacate Mountains, November 14, 1907, MacDougal 30. 
Isomeris arborea Nutt.; Torr. & Gr. Fl. N. Amer, 1: 124, 1838. 
Type locality, ‘‘St. Diego, California. ” 
Pinacate Mountains, at 600 to 900 meters, November 21, 1907, MacDougal. 
Wislizenia costellata Rose, Proc. Biol. Soc. Washington 19: 132. 1906. 
Type locality, ‘‘Sonora, Mexico. Between Nogales and Guaymas. ” 
Sonoyta, November 8, 1907, MacDougal 12. 
Krameria glandulosa Rose & Painter, Contr. Nat. Herb. 10: 108. 1906. 
Type locality, ‘‘Near El Paso, Texas.” 
Hornaday Range, Pinacate Mountains, November 14, 1907, MacDougal 23. 
Acacia greggii A. Gray, Smiths. Contr. Knowl. 3: 65. 1852. 
Type locality, ‘“Dry valley west of Patos, Northern Mexico.” 
No specimens were collected but the plant was observed throughout the region 
visited. 
