1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 491 



4,700 feet. Common here and in the foot hills are the small Gray Oak 

 and Emory's Oak {Quercus Emoryi). The latter is larger than the pre- 

 ceding and of more elegant port and foliage. On the El Paso road, 

 where it skirts the southern base of the mountains, this stately Oak be 

 comes the main feature of the sylva; its straight trunk is from 2 to 4 

 feet in diameter while the dark mass of shining foliage reaches the 

 height of 60 feet. Here, also, the Nut Pine attains the unusual size of 

 18 inches in diameter and 40 feet in height. 



In caiions near the Post, and on surrounding cliffs, are found : Frijo 

 lillo [Sophora secundiflora), Cedar {Juniperus oecidentalis), Choke Cherry 

 {Frunns CapuU f), small tree 10 to 15 feet high; Madroija, small and un 

 common ; FhUadelphus serpyllifoUus, Fendlera rupicola, Sumachs {Fhus 

 microphylla and trilobata), Wild Mulberry, and several suffruticose spe- 

 cies of Croton. The Leguminous shrubs Acacia Greggii and Mimosa 

 hiuncifera are also prominent. 

 The Desert Willow {Chilopsis saligna) grows on the parade-ground. 

 Of the lignescent or herbaceous plants at and about Fort Davis the 

 following are the most conspicuous : 



Acacia filicina, 



Bouvardia hirtella. 



Tecoma stans. 



JSlolina erumpens. 



Lithospermum multiflorum and Cobrense. 



Cucurbita perennis. ' 



Apodanthera undulata. 



Houstonia angustifoUa. 



Fentstemon barbatus, Fendleri, glaber (var. cyananthus). 



Gastilleia integra and lanata. 



Mimulus Jamesii, var. Texensis. 



(Enothera speciosa, triloba, tubicola, primiveris, pinnatifida. 



Gaura sinuata and macrocarpa. 



Mentzelia Wrightii. 



Asclepias tuberosa, verticillata, longicornu, Jamesii, nummularia, 

 perennis. 



Philibertia linearis. 



Qonolobus reticulatus and productus. 



Oxalis Wrightii. 



Boerhaavia scandens and Grahami. 



Fhlox nana. 



Fhacelia glandulosa. 



Astragalus Nuttallianus and moUissismus. 



Dalea rubescens, aurea, pogonathera. 



Fhaseolus macropoides. 



Cologania longifolia. 



Liniim multicaule Siud perenne. 

 Verbena bipinnatifida and ciliata. 



Thamnosma Texanum. 



