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 (Qnercus 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 Kut Pine attains the unusual size of 

 18 inches in diameter and 40 feet in height. 



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

 lillo (Sophora secundiflora), Cedar (Janiperus occidentalis), Choke Cherry 

 {Prunus Capuli ?), small tree 10 to 15 feet high; Madrona, small and un 

 common; Philadelphus serpyllifolius, Fendlera rupicola. Sumachs (Bhus 

 microphylla and triloba fa). Wild Mulberry, and several suffruticose spe- 

 cies of Croton. The Leguminous shrubs Acacia Greggii and Mimosa 

 biuncifera 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. 



Molina erumpens. 



Lithospermum multiflorum and Oobrense. 



Cucurbita percnnis. 



Apodanthera undulata. 



Houstonia angustifolia. 



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



Castilleia integra and lanata. 



Mimulus Jamesii, var. Texensis. 



Oenothera speeiosa, triloba, tubicola, primiveris, pinnatifida. 



Gaura sinuata and macrocarpa. 



Mentzelia Wrightii. 



Asclepias tuberosa, verticillata, longicomu, Jamesii, mimmularia, 

 perennis. 



Philibcrtia linearis. 



Gonolobus reticulatus and productus. 



Oxalis Wrightii. 



Boerhaavia scandens and Grahami. 



Phlox nana. 



Phacella glandulosa. 



Astragalus Nuttallianus and mollissismus. 



Dalea rubescens, aurea, pogonathera. 



Phaseolus macropoides. 



Cologania longifolia. 



Linum multicaule and perenne. 

 Verbena bipinnatijida and ciliata. 



Thamnosma Texanum. 



