STANDLEY TREES AND SHRUBS OF MEXICO. 1051 



3. Heterocentron subtriplinervium (Link & Otto) A. Br. Ind. Sem. Hort. 



Berol. App. 3. 1851. 



Melastoma siibtriplinervia Link & Otto, Icon. PI. Rar. pi. 2^. 1841. 



Heerla suhtripliHcrvia Triana, Trans. Linn. Soe. F.ot. 28: 34. 1871. 



Veracruz and Oaxaca. Guatemala. 



Stems erect or decumbent, chietl.v herbaceous, sparsely setulose ; leaves 

 elliptic-oblong or oblong-lanceolate, 3 to 6 cm. long, acute, 9 to 13-uerved, 

 attenuate at ba.se ; petals white, about 1 cm. long. " Caua de venado " 

 (Veracruz). 



Said to be employed in Veracruz as a remedy for gonorrhoea. 



4. Heterocentron laxiflorum Standi., sp. nov. 



Type from El Ocote, Cerro Pedregoso. Michoacan or Guerrero (Langlasse 

 536; U. S. Nat. Herb. no. 386019). 



Stems suffrutescent, quadrangular, 1.5 meters high, sparsely appressed- 

 setulose ; leaves slender-petiolate, lance-oblong or ovate-oblong, 3 to 5 cm. 

 long, 1 to 2 cm. wide, acute, attenuate at base, pinnate-nerved, thin, ciliate, 

 sparsely appressed-setulose ; panicles many-flowered, the branches very slender, 

 glabrou.s, the pedicels filiform, curved, 7 to 10 mm. long; calyx tube 2.5 mm. 

 long, glabrous or sparsely short-setulose Avirh eglandular hairs, the lobes 4 to 



5 mm. long, linear or nearly so, eciliate ; petals white, 7 to 8 mm. long ; 

 capsule about 5 mm. long, the lobes eciliate. 



5. Heterocentron axillare Naud. Ann. Sci. Nat. III. 14: 155. 1850. 

 Heterocentron alpestre Naud. Ann. Sci. Nat. III. 14: 156. 1850. 

 Heterocentron gla-ndulosum Schenck in Kegel, Gartenfl. 1856: 227. pi. 169. 



1856. 

 Heeria axillaris Cogn. in DC. Monogr. Plian. 7: 138. 1891. 

 Veracruz and Oaxaca. Central America. 



Stems herbaceous or suffrutescent, appressed-setulose ; leaves elliptic-oblong 

 or ovate-oblong, 3 to 6.5 cm. long, acute, entire, densely setulose ; petals pink, 



6 to 8 mm. long. 



6. Heterocentron mexicanum Hook. & Arn. Dot. Beechey Voy. 290. 1840. 

 Heterocentron vndulatum Naud. Ann. Sci. Nat. III. 14: 155. 1850. 

 Heeria undulnta Triana, Trans. Linn. Soc. Bot. 28: 34. 1871. 



Sinaloa, Durango, Tepic, Jalisco, and Guerrero ; type from the Sierra Madre. 



Stems chiefly herbaceous, erect, appressed-setulose ; leaves oblong to elliptic, 

 3 to 7 cm. long, obtuse or acute, appressed-setulose ; petals white or pink, 

 5 to 8 mm. long. 



7. Heterocentron roseum A. Br. & Bouche, Ind. Sem. Hort. Berol. 14. 1851. 

 Heeria rosea Triana, Trans. Linn. f!oc. Bot. 28: 34. 1871. 



Veracruz, Oaxaca, and Chiapas. Honduras. 



Stems appressed-setulose, acutely quadrangular; leaves oblong or oblong- 

 ovate, 3 to 5 cm. long, acute, attenuate at base ; petals white or pink, about 

 8 mm. long. 



In Guanajuato, where the plant is cultivated, it is said to be known as 

 " perla de Cuba." 



8. Heterocentron occidentale Rose, Contr. U. S. Nat. Herb. 8: 327. 1905. 

 Type collected between Pedi'o Paulo and San Blascito. Tepic. 



Stems suffrutescent, about 2 meters high, densely appressed-setulose ; leaves 

 ovate or oblong-ovate, 6 to 8 cm. long, acute, densely appressed-setulose; petals 

 white, 8 to 10 mm. long. 



