STANDLF.Y TEEES AND SHRUBS OF MEXICO. 1239 



4. Citharexylum rosei Greenm. Field Mus. Bot. 2: 260. 1907. 

 Type from San Pablo, Queretaro. 



Leaves ovate or rhombic-ovate, 1 to 3 cm. long, obtuse, cinereous-tomentose 

 beneath, entire ; fruit 7 to 8 mm. long. 



5. Citharexylum flabellifolium S. Wats. Proc. Amer. Acad. 24: 67. 1889. 

 Baja California and Sonora ; t,ype from Guaymas, Sonora. 



Shrub, the branches terete; leaves rounded or truncate at apes, petiolate, 

 hirtellous; calyx 6 mm. long, inclosing the fruit, the teeth subulate; corolla 

 dark violet, 12 mm. long, the tube not exserted ; fruit black, 4 to 6 mm. in 

 diameter. 



6. Citharexylum rugendasii Cham. Linnaea 7: 120. 1832. 

 ICitharexylnm rugendasii endlichii Loesener, Repert. Sp. Nov. Fedde 9: 



307. 1911. 



Veracruz ; type from Jalapa. 



Medium-sized tree, the branches tetragonous; leaves ovate-oblong, 10 to 20 

 cm. long, 5 to 9 cm. wide, short-acuminate, rounded at base and decurrent, 

 glabrous above, lustrous; racemes paniculate, erect; calyx 3 mm. long, hir- 

 tellous ; corolla white, the tube longer than the calyx. 



Schauer * states that C. mocini Don,^ which was described from Mexico, 

 differs only in its nodding racemes. 



7. Citharexylum kerberi Greenm. Field Mus. Bot. 2: 188. 1907. 

 Type from Mexico, probably from Veracruz. 



Branches terete or subetragonous ; leaves short-petiolate, elliptic, obovate, 

 or oblong-oblanceolate, 5 ft) 15 cm. long, acute or short-acuminate, scaberulous 

 above, densely hirtellous beneath; racemes terminal, 13 to 18 cm. long; calyx 

 6 to 7 mm. long, 5-dentate ; corolla glabrous outside. " Aceitunillo." 



8. Citharexylum trinerve Blake, Proc. Biol. Soc. Washington 34: 45. 1921. 

 Type from Xnocac, Yucatan. 



Shrub 1.5 meters high; leaves oval or elliptic, 3 to 5.5 cm. long, obtuse 

 or eraarginate, short-cuneate at base, reticulate-veined, strongly 3-nerved; spikes 

 2.5 cm. long; corolla glabrous outside. 



9. Citharexylum incanum Sesse & Moc. ; Don, Edinburgh New Phil, Journ. 



11: 238. 1831. 



Citharexylum scabrum Sesse & Moc. ; Don, Edinburgh New Phil. Journ. 

 11: 238. 1831. 



Citharexylum cinaloanum Robinson, Bot. Gaz. 16: 342. 1891. 



Sinaloa. 



Leaves on long or short petioles, oval to oblong-ovate, 3 to 10 cm. long, 

 rounded to acuminate at apex, rounded to acute at base and decurrent, entire 

 or dentate, scabrous above, finely hirtellous beneath, with prominent reticulate 

 venation ; racemes terminal, solitary or paniculate, erect ; calyx 2 mm. long ; 

 corolla puberulent outside. 



The original descriptions of the two SessS and Mocino species are incom- 

 plete, but both mention the recurved or spreading calyx teeth. The present 

 plant is the only INIexican one seen by the writer which possesses this character. 



10. Citharexylum berlandieri Robinson, Proc. Amer. Acad. 26: 174. 1891. 

 Sinaloa, Tamaulipas, San Luis Potosi, and Veracruz; type from Las Canoas, 



San Luis Potosi. 



Shrub or tree, 2 to 9 meters high, the trunk sometimes 30 cm. in diameter, 

 the branches pendent, tetragonous when young; leaves oblong to ovate or 



^In DC. Prodr. 11: 614. 1847. 



"Edinburgh New Phil. Journ. 11: 238. 183L 



