610 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



9. Phyllanthus glaucescens H. B. K. Nov. Gen. & Sp. 2: 115. 1817. 

 Yucatan Peninsula ; type from Campeche. Guatemala. 



Shrub ; leaves ovate-oval to orbicular-elliptic, 9 to 22 cm. long, acute or short- 

 pointed, glabrous, pale beneath ; capsule raOre than 2 cm. in diameter. " Xpbixt- 

 don " (Yucatan). 



10. Phyllanthus adenodiscus Muell. Arg. Linnaea 32: 23. 1863. 

 Tamaulipas, San Luis Potosi, and Veracruz ; type from Papantla, Veracruz. 

 Shrub, 1.5 to 3 meters high ; leaves rounded-ovate to oblong-elliptic, 8 to 15 



cm. long, acuminate, glabrous, pale beneath ; capsule 4 cm. long or larger. 



11. Phyllanthus acuminatus Vahl, Symb. Bot. 2: 95. 1791. 



1 Phyllantlins sessei Briq. Ann. Cons. .Tard. Geneve 4: 224. 1900. 



Baja California to San Luis Potosi, Yucatan, and Oaxaca. West Indies, Cen- 

 tral America, and South America. 



Shrub or tree, 3 to 6 meters high, with slender green angulate branches ; leaves 

 ovate to oval, mostly 3 to 4 cm. long, green ; capsule about 4 mm. long. " Cirue- 

 lillo " (Tabasco); " chilillo," " gallina " (Costa Rica). 



12. Phyllanthus mocinianus Baill. Adansonia 1: 35. 1860. 

 Described from specimens believed to have come from Mexico. 

 Glabrous ; leaves ovate or cordate-ovate, 1.5 to 3 cm. long. 



13. Phyllanthus subcuneatus Greenm. Proc. Amer. Acad. 33: 478. 1898. 

 Puebla ; type fitim limestone ledges near Tehuacan. 



Slender shrub, 1 meter high or less ; leaves cuneate-obovate, 4 to 7 mm. long, 

 glabrous ; capsule 4 mm. broad. 



14. Phyllanthus micrandrus Muell. Arg. Linnaea 32: 27. 1863. 

 Phyllanthus pringlei S. Wats. Proc. Amer. Acad. 26: 147. 1891. 



Sinaloa to San Luis Potosi and Guerrero. Guatemala ; type from Venezuela. 

 Slender shrub or tree, 2 to 6 meters high ; leaves orbicular or rounded-ovate, 

 1 to 3.5 cm. long, thin, glabrous ; flowers greenish white. 



6. ASTROCASIA Robins. & Millsp. Bot. Jahrb. Engler 36: Beibl. 80: 19. 1905. 



1. Astrocasia phyllanthoides Robins. & Millsp. Bot. Jahrb. Engler 36: Beibl. 

 80: 20. 1905. 

 Yucatdn ; type from Itzimna. J 



Shrub, 1 to 2 meters high ; leaves deciduous, slender-petiolate, orbicular to 



ovate, 4 to 13 cm. long, rounded or obtuse at apex, entire, pale beneath ; flowers 



dioecious, fasciculate on short lateral spurs, borne on long filiform pedicels ; 



capsule 8 mm. long. " Xkahyuc," " xcaba-xpixtolon " (Maya). 

 This has been reported from YucatSn as Phyllanthus nutans Swartz. 



7. CROTON L. Sp. PI. 1004. 1753. 



Trees or shrubs; leaves alternate, petiolate, stipulate, entire or dentate, 

 rarely lobate ; piibescence of stellate hairs or of scales ; flowers small, monoe- 

 cious or dioecious, with or without petals, racemose; fi'uit a more or less 

 3-lcbute capsule. 



Several herbaceous species are found in Mexico. Croton elutcria (L.) 

 Swartz, of the Bahamas, produces the cascarilla bark of commerce, which is 

 employed in medicine as a tonic. 



Petals well developed in both staminate and pistillate flowers. Pubescence 

 lepidote. 



Leaves pinnately nerved : 1. C. glabellas. 



Leaves 3 or 5-nerved at base. 



Ovary and fruit smooth, densely lepidote 2. C. niveus. 



Ovary and fruit tuberculate, hispid 3. C. reflexifolius. 



