98 



BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



the altitude of 1,400 meters (4,600 feet). Mesquites, acacias, and 

 mimosas were locally numerous. 



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

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

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

 Dutch Charley's Eanch 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 were made. 



Vegetation. — Govillea tridentata and Fouquieria splendens cover 

 much of the- region. Gourds {Cucuriita digitata, C. fwtidissima, 

 and Apodanthera undulata) are numerous; and the thickets about 

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

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

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

 palmeri) is also abundant. 



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

 kilometers (225 miles) from the Eio 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 1 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 extremely 

 barren. A few trees grew along an arroyo and beside two little 

 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 (Bngelmann) 



Sargent. 

 Yucca ^revifoUa Torrey. 

 Juglans rupestris Bngelmann. 

 Salix nigra Marshall. 

 Salix taxifoUa Humboldt, Bonpland, 



and Kunth. 

 Populus fremontii Watson. 

 Quercus ohlongifolia Torrey. 

 Quercus toumeyi Sargent. 

 Celtis reticulata Torrey. 



Morns celtidifolia Humboldt, Bon- 

 pland, and Kunth. 

 Platanus wrigMll Watson. 

 Acacia constricta Bentham. 

 Acacia greggii Gray. 

 Prosopis glandulosa Torrey. 

 Acer negundo Linnaeus. 

 Sapindus marginatus Willdenow. 

 Arbutus arizonica (Gray) Sargent. 

 GMlopsis linearis (Oavanilles) Sweet 



