76 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



Prairie mesquite, Prosopis glandulosa Torrey. 

 Texas redbud, Cercis reniformis Engelmann. 



Goral-bean. Frijolito. "Laurel," Sophora secundiflora (Cava- 

 nilles) de Candolle. 



Texas buckeye, Ungnadia speciosa Endlicher. 



Wild china, Sapindus marginatus Willdenow. 



Mexican persimmon, Brayodendro'n texanum (Scheele) Small. 



The following half-wild species of trees, introduced from other 

 localities, were 1 common: 



Cedar, ( 'hama <'i//><tris. 



Fig, Ficus. 



Umbrella china tree, ftfelia azeddrach umbraculifera Sargent. 



Desert willow, GhUopsis linearis (Cavanilles) Sweet. 



Beautiful caesafpinia, Poindana pulcherrima Linnaeus. 



The plants which make up the bulk of the chaparral and the 

 thickets along streams are the Texas barberry (Berberis tr/f<>li<it<i 

 Moricand), the blackberry (Rubus sp.), the green-bark acacia (Gercid- 

 ium texanum Gray), the true acacias {Acacia amentacea de Can- 

 dolle, A. berlandieri Bentham, .1. rmmeriana Schlechtendal) , the 

 Texas colubrina (Golubrina texensis Gray), several species of sumach 

 (Rhus trilobata Nuttall, R. microphylla Englemann, etc.), and the 

 button-bush (Gephalanthus occidentalis Linnaeus), with which are 

 often associated the Texas fog-fruit (Lippia ligustrina Britton), 

 blazing star (Lacinaria), and horse nettle (Solanum carolinense 

 Linnaeus). Vines of many kinds make canopies over the smaller 

 streams, and in open spaces the " calabazilla " or wild pumpkin (Gu- 

 curbita fmtidissima Humboldt, Bonpland, and Kunth) is abundant. 

 Spanish bayonet, soapweed (Yucca <jhin<-<i Nuttall), and spotted 

 agave (Agave maculosa Hooker) cover much of the dry plains, in 

 company with shrubs and members of the cactus family, which 

 include, besides an abundance of prickly pears and Gylindropuntias, 

 Cactus stellatus texanus (Engelmann), Ccreus (Echinocereus) cais- 

 pitosus Engelmann and Gray, and other species of Echinocereus and 

 several species of the hedgehog-cactus (Echinocactus horizontha- 

 lonius,E. setispinus, and E. hamatocanthus longihamatus) . 



The fauna of this station is rich. Crustaceans, fishes, birds, and 

 mammals are abundant. The reptilian fauna is more varied than at 

 any other station occupied by us. Turtles are numerous in species. 

 Alligator mississippiensis Daudin has once been taken about 32 km. 

 (•_'() miles) south of Fort Clark, and the species is said to exist in 

 lagoons of the Rio Grande a short distance to the eastward. Lizards 

 are abundant. Among those collected are the horned toad (Phryn- 

 osoma cornutum) and Liolepisma laterals (Say). The banks, pools, 

 and streams swarm with aquatic reptiles; on land the bead snake 



