98 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



the altitude of 1.400 meters (4,000 feet). Mesquites, acacias, and 

 mimosas were locally numerous. 



Station No. 29. — Dutch Charley's Ranch, 1 kilometer (| mile) 

 north of Monument No. 88, and 355 kilometers (221 miles) from the 

 Rio Grande. Altitude. 1,316 meters (4,318 feet). A small pool at 

 Dutch Charley's Ranch usually contains a good supply of water, 

 and the bushes and sedges around it shelter birds and mammals. 

 The region is treeless, except for a few juniper and hackberry trees 

 in arroyos from the Mule Mountains. On the surrounding hills the 

 soil is loose and ashy, in places piled with scoria, or covered with 

 brushwood. The locality was visited by Mr. Holzner, September 12, 

 1892, and by myself. September 12, 1892, August 12 to 14, and Octo- 

 ber 7 to 8, 1893. Small collections w T ere made. 



Vegetation. — Covillea tridentata and Fouquieria splendens cover 

 much of the region. Gourds (Cucurbita digitata, G. foetidissima, 

 and Apodanthera undulata) are numerous; and the thickets about 

 rocky hills are composed principally of woody cactus (Opuntia lepto- 

 caulis), prairie acacia {Acacia filiculoides) , senna (Cassia wisli- 

 zeni), mimosas (several species), and low yuccas. Mescal (Agave 

 palmeri) is also abundant. 



Station No. 30. — Johnston's Ranch, near Monument Xo. 90. 363 

 kilometers (225 miles) from the Rio Grande. Altitude 1,390 meters 

 (4,561 feet). This station is at the south end of the Mule Mountains 

 and 14 kilometers (9 miles) nearly south of the mining town of Bis- 

 bee, Arizona. Occupied by myself, September 12 to October 2, and 

 October 7 to 10, 1892; August 12 and October 8, 1893; by Mr. Holz- 

 ner, September 12 to October 2, and October 7 to 10, 1892. The plain 

 on the south and the Mule Mountains on the north are extivin 1 v 

 barren. A few trees grew along an arroyo and beside two lilt In- 

 artificial ponds, supplied by wells and windmills, for the use of cattle. 

 The collections consisted chiefly of birds, mammals, and plants; also 

 accessories for mammal groups to be prepared at the U. S. National 

 Museum. 



Flora of Mule Mountains. — In the lists that follow the principal 

 varieties of plant life found near this station are given. 



The trees are : 



Juniperus monosperma (Engelmann) 



Sargent. 

 Yucca brevifolia Torrey. 

 Juglans rupestris Engelmann. 

 Salix nigra Marshall. 

 Halix taxifolia Humboldt, Bonpland, 



and Kuntli. 

 Populus fremontii Watson. 

 Quercus oMongifolia Torrey. 

 Quercus toumeyi Sargent. 

 Celtis reticulata Torrey. 



Morus celtidifolia Humboldt. Bon- 

 pland, and Kunth. 

 1'ln tn a us wrightii Watson. 

 Acacia constrict a Bentham. 

 Icacia greggii Gray. 

 Prbsopis glandulosa Torrey. 

 Acer negundo Linnseus. 

 Sapindus marginatus Willdenow. 

 Arbutus arizonica (Gray) Sargent. 

 Chilopsis linearis (Cavanilles) Sweet. 



