1228 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



6. Eliretia cordifolia Robinson, Proc. Amer. Acad. 29: 319. 1894. 

 Type from Zapotian, Jalisco. 



Large tree ; leaves ovate, 5 to 7 cm. long, acute, coriaceous, very scabrous ; 

 panicles small ; fruit 8 mm. long. 



7. Eliretia latifolia DC. Prodr. 9: f)03. 1845. 



Eliretia mexicana S. Wats. Proc. Amer. Acad. 26: 144. 1891. 



Jalisco to Puebla and Oaxaca. 



Leaves lance-oblong to broadly ovate or elliptic, 4 to 9 cm. long, acuminate, 

 scabrous or scaberulous ; panicles usually as long as the leaves, dense or 

 open ; fruit about 6 mm. long. 



4. COLDENIA L. Sp. PI. 125. 1753. 



Herbs or low shrubs; leaves alternate, entire, small; flowers small, axillary 

 or in terminal heads; calyx 4 or 5-parted, the segments narrow; corolla 

 subrotate ; styles 2, filiform ; fruit drupaceous, globose, containing 4 hard nut- 

 lets. 



A few other species, which are wholly herbaceous, occur, in Mexico. 



Plants erect; flowers in terminal heads 1. C. greg'gil. 



Plants prostrate or nearly so ; flowers axillary. 



Leaves linear, rigid. Fruit deeply 4-lobate 2. C. hispidissima. 



Leaves mostly ovate or elliptic. 



Leaves hispidulous, green, without toraentum 3. C. purpusii. 



Leaves tomentose, whitish or grayish, often also hispidulous. 

 Leaves canescent-tomentose, the pubescence all appressed. 



4. C. canescens. 

 Leaves hispid with spreading hairs and also tomentose. 



Nutlets about 1 mm. long; petioles nearly as long as the blades. 



5. C. mexicana. 

 Nutlets 1.5 mm. long; petioles very short 6. C. tomentosa. 



1. Coldenia greggii (Terr.) A. Gray, Syn. Fl. 2^: 182. 1878. 

 Ptilocalyx greggii Torr. U. S. Rep. Expl. Miss. Pacif. 2: 110. p/. 8. 1855. 

 Chihuahua, Coahuila, Durango, and Zacatecas; tyi^e from Buena Vista, 



Coahuila. Western Texas and southern New Mexico. 



Shrub, 60 cm. high or less, much branched; leaves ovate or oval, 5 to 8 

 mm. long, canescent-tomentose, short-petiolate ; calyx lobes filiform, plumose 

 with long hairs; corolla 5 mm. long; fruit 4-sulcate. " Cenizo," " hierba del 

 cenizo " ( Durango ) . 



2. Coldenia hispidissima (Torr.) A. Gray. Proc. Amer. Acad. 5: 310. 1S62. 



Eddya hispidissima Torr. U. S. Rep. Expl. Miss. Pacif. 2: 170. pi. 9. 1855. 



Chihuahua and Coahuila, Western Texas to Arizona and Utah ; type col- 

 lected near El Paso, Texas. 



Plants suffrutescent, much branched ; leaves mostly sessile, 4 to 8 mm. Ion?;, 

 hispid and puberulent, revolute, the costa thick and conspicuous; calyx lobes 

 linear. 



3. Coldenia purpusii T. S. Brandeg. Univ. Calif. Publ, Bot. 4: 18G. 1911. 

 San Luis PotosI; type from Minas de San Rafael. 



Plants suffrutescent, hispid ; leaves ovate or elliptic, 5 to 8 mm. long, acute, 

 petiolate; calj^ lobes linear; corolla purplish. 



4. Coldenia canescens DC. Prodr. 9: 559. 1845. 



Stegnocarpus canescens Torr. U. S. Rep. Expl. Miss. Pacif. 2: 169. 1855. 

 Chihuahua to Zacatecas, Hidalgo, and Tamaulipas ; type collected between 

 Santander and Victoria, Tamaulipas. Western Texas to Arizona. 



