422 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



1. Stems woody; plants straggling shrubs; spines of the fruit rarely without barbs 

 (2). 



2. Herbage densely sericeous-tomentose, the pubescence not closely appressed, 

 soft; branchlets spinescent; upper petals separate to the base, with 

 narrow blades; spines of the fruit with barbs in one series at the apex 

 of the spine; glands none 2. K. grayi. 



2. Herbage densely to sparsely strigose, the pubescence rather harsh; branchlets 

 rigid but scarcely spinescent; upper petals more or less united toward 

 the base, with broad blades; spines of the fruit with scattered barbs below 

 the apex, rarely barbless; glands present or absent- 3. K. parvifolia 



1. Krameria lanceolata Torr., Ann. Lye. N. Y. 2: 168. 1827. 



Krameria secundiflora of authors. Not of DC. 



Cochise, Santa Cruz, and Pima Counties, 2,500 to 5,000 feet, 

 May to August. Kansas and Arkansas to southeastern Arizona and 

 Mexico. 



2. Krameria grayi Rose and Painter, Contrib. U. S. Natl. Herbarium 



10: 108. 1906. 



Krameria canescens A. Gray, PL Wright. 1:42. 1852. Not of 

 Willd., 1825. 



Mohave, Maricopa, Pinal, Pima, and Yuma Counties, 4,000 feet or 

 (usually) lower, April and May. Western Texas to southern Nevada, 

 Arizona, southern California, and northern Mexico. 



White rat any. 



3. Krameria parvifolia Benth., Bot. Voy. Sulph. 6. 1844. 

 Coconino County (bottom of the Grand Canyon) and Mohave 



County to Cochise, Santa Cruz, Pima, and Yuma Counties, 5,000 

 feet or lower, April to October. Texas to southern Nevada, Arizona, 

 southern California, and northern Mexico. 



Range ratany. The species occurs in Arizona in 2 nearly equally 

 common forms: (1) var. glandulosa (Rose and Painter) Macbride 

 (K. glandulosa Rose and Painter) , with stipitate glands on the pedicels 

 and often elsewhere; (2) var. imparata Macbride (K. imparata Britton) 

 without glands. 



8. CERCIS. Redbud 



Usually a small tree, glabrous or glabrate; leaves large, simple, with 

 round-cordate entire blades; flowers appearing before the leaves, in 

 scattered fascicles on the old wood, irregular, falsely pealike, purplish 

 red; stamens 10, separate; pods flat, dehiscent, thin-walled, several- 

 seeded. 



Several species very like that of Arizona are grown as ornamentals. 

 The astringent bark of C. canadensis L. has been used as a remedy 

 for diarrhea and dysentery. 



1. Cercis occidentalis Torr. in A. Gray, Boston Jour. Nat. Hist. 6: 

 177. 1850. 

 Grand Canyon (Coconino County), Pagumpa Springs (Mohave 

 County), Superstition Mountains (Pinal County), about 4,000 feet, 

 March to April. Southern Utah, Arizona, and California. 



In Arizona the stems reach a height of 3.5 m. (12 feet) and have 

 smooth gray bark. 



9. CASSIA. Senna 



Plants annual or perennial, herbaceous or shrubby; leaves pinnate, 

 the leaflets few or numerous; flowers moderately irregular, in racemes 



