50 . PLANT LIFB: IN OKLAHOMA. 



PEA FAMILY — (Legirninosae) . — This family includes the sensi- 

 tive briar found on rough hill sides and grassy slopes throughout the 

 State, except in the extreme western part; Desmanthus (3), mesquite 

 (on prairies and river valleys in the western third of the State) ; Ken- 

 tuolry coffee tree (coffee-hean tree), honey locust, blueweed or cycle pod, 

 partridge pea, sensitive plants, hank burr, redbud, Judas tree, wild indigo, 

 and false indigo, rattle boxes, Nebraska bluepine (western Panhandle 

 counties), clovers (trifolium), sweet clovers, prairie bird's foot, trefoil, 

 snakeroot, Indian ox prairie turnip^, also called bread-root, bead plant, 

 or devil's shoestring, river locust or false indigo, wild sweet pea, western 

 indigo plant, peatree, wisteria, ground plums, tick-trefoil (15), bush- 

 clovers (12), pencil flower, vetches (8), wild peas, guound-nut, wild 

 bean, hog peanut, milk peas. 



FLAX FAMILY — (Linaceae). — Includes the cultivated and wild 

 flaxee (8). 



OXALIS FAMILY— {OxaJidaceae} .—This family includes the 

 oxalis or wood sorrels. All of the forms are found throughout the State, 

 but are most abundant in the central and eastern part. 



GEEANIUM FAMILY — (Geraniaceae). — Crane's bill geraniums, 

 in waste places and lawns, over most of the State, but chiefly in the 

 eastern part. 



CALTEOP FAMILY — (Zygophyllaceae). — Herbs having prostrate, 

 much branched stems, including the coltrap burr, or Mexican sand 'burr, 

 found in the northwestern part of the State; and the greater caltrop 

 found throughout the prairie parts of the State. 



RUE FAMILY — (Rutaceae). — Includes the prickly ash or tooth- 

 ache tree, found in the eastern and southern parts of the State; and the 

 hop tree {ptelea trifoliaia), found in open woods and rocky banks 

 throughout the State. 



MILKWORT FAMILY— (PoZ^/^ateceae).— Includes 5 species of 

 the milkwort, widely distributed throughout the State. 



■SPURGB FAMILY— (^'wp/ior&mceae).— This family includes sev- 

 eral plants, among which are the spurge nettles (tread-softly), the croton 

 weeds (goat weed), the three-seated mert'ury, queen's delight, and the 

 spurges (23). 



SUMAC FAMILY — (Anacardriaceae) . — Includes the sumacs, 

 poison ivy and American smoke-tree (eastern part of the State) . 



HOLLY FAMILY— (ZZicaceae).— Includes the hollys of which 2 

 species are found in Oklahoma, the American white or Christmas holly, 

 and the swamp holly, found in swamps and thickets in the eastern part 

 of the State. 



STAFF TREE FAMILY— (OeZasfraceae).— Includes the wahoos 

 (burning bush) and bittersweets. 



