766 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



The leaves are used in some parts of Mexico as a substitute for Ctiinese tea. 

 Tlie strong fiber of the bark is utilized for various purposes. The plants are 

 much eaten by cattle, and they are very common weeds about houses and in 

 fields. Maiden reports that in Australia fowls are sometimes killed by eating: 

 the ripe carpels, the sharp points irritating the digestive canal and causing 

 inflammation. In Costa Rica a decoction of the roots is used as a remedy for 

 infantile diarrhea. 



21. Sida corymbosa R. E. Fries, Bull. Herb. Boiss II. 7: 998. 1907. 

 Tepic to Veracruz ; type from the region of Orizaba, Veracruz. 



Plants suffrutescent, the stems stellate-hirsutulous ; leaves short-petiolate^ 

 oblong or lance-oblong, 3 to 7 cm. long, acute or obtuse, serrate, pilose above, 

 coarsely stellate-pubescent beneath; flowers long-pedicellate; calyx 1 cm. long; 

 petals about 8 mm. long. 



This species was reix>rted from Mexico by Hemsley as S. glomerata Cav. 



22. Sida urens L. Syst. Nat. ed. 10. 1145. 1759. 



Veracruz. West Indies, Central America, South America, and tropical Africa. 



Stems herbaceous or suffrutescent, hispid ; leaves long-petiolate, ovate-cordate 

 or lance-ovate, 2 to 12 cm. long, acuminate, dentate or serrate, green ; calyx 

 hispid; petals purplish, little exceeding the calyx; carpels net beaked. 



23. Sida aggregata Presl, Rel. Haenk. 2: 106. 1830. 

 Guerrero. Panama ; reported from Jamaica and Venezuela. 



Slender shrub, the branches minutely tomentulose ; leaves broadly cordate,. 

 4 to 10 cm. long, acute, crenate ; calyx densely long-pilose ; petals 4 mm. long ; 

 carpels not beaked. 



24. Sida angustifolia Lam. Encycl. 1: 4, 1783. 

 Sida linearis Cav. Icon. PI. 4: 6. pL 31J,, f. 1. 1797. 

 Sida hyssopifoUa Presl, Rel. Haenk. 2: 109. 1836. 



Tepic to Tamaulipas, Veracruz, and Oaxaca. Texas and Arizona, Central 

 America, South America, and the ti'opics of the Old World. 



Plants herbaceous or frute.scent, the stems and leaves minutely stellate- 

 tomentulose ; leaves on long or short petioles, acute or obtuse, crenate or ser- 

 rate; flowers short-pedicellate; petals pale yellow, 4 to 6 mm. long; carpels 

 2-awned. 



This has often been reported from Mexico as 8. spinosa L. 



25. Sida procumbens Swartz, Prodr. Veg. Ind. Occ. 101. 1788. 



Sida pilosa Cav, Monad. Diss. 1: 9. pi. 1, f. 8. 1785. Not S. pilosa Mill. 1768.. 



Sida svpina L'Her. Stirp. Nov. 5: 109 bis. pi. 52 Us. 1789. 



Sida diffusa H. B. K. Nov. Gen. & Sp. 5: 257. 1821. 



Sida filifornUs Moric. PI. Amer. Rar. 10. pi. 8. 1830. 



Sonora and Chihuahua to Tamaulipas, YucatAn, and Oaxaca. Texas to 

 Arizona, and in the West Indies, Central America, and northern South America, 



Stems chiefly herbaceous and decumbent, stellate-pubescent and usually 

 pilose; leaves ovate-oblong to rounded-ovate, obtuse or rounded at apex, 

 crenate ; flowers on filiform pedicels ; petals yellow, 6 to 8 mm. long ; carpels 

 apiculate or short-beaked. 



26. Sida decumbens St. Hil. & Naud. Ann. Sci. Nat. II. IS: 51. 1842 

 Guerrero. Guatemala and South America ; type from Brazil. 



Stems chiefly herbaceous and decumbent, long-pilose; leaves long-petiolate, 

 obliquely ovate-cordate, 2 to 7.5 cm. long, acute or acuminate, crenate, thin, 

 green, sparsely hirsute; petals 6 mm. long; carpels not beaked. 



