STANDLEY TREES AND SHRUBS OF MEXICO. 249 



name "palo miilato." A related species, T. tovientosa Wedd., is a small tree 

 with hollow stems infested by ants, known in Costa Rica as " hormigo " and 

 " tabaco." 



10. RUPEECHTIA C. A. Meyer, Mem. Acad. St. Petersb. VI. 6: 148. 1840. 

 Trees or shrubs with rather small leaves; flowers dioecious, fasciculate in 

 short spikes ; pistillate calyx accrescent in fruit. 



Venation of the lower surface of the leaves very prominent and finely reticu- 

 late. 



Fruiting sepals 3.5 to 4 cm. long 1. R. macrosepala. 



Fruiting sepals 1.3 to 2.7 cm. long. 



Leaf blades narrowly elliptic-oblong or lanceolate, 0.8 to 2.5 cm. wide, 

 nearly glabrous beneath ; fruiting sepals 1.3 to 1.8 cm. long. 



2. R. occidentalis. 

 Leaf blades elliptic, 1.8 to 3.5 cm. wide, densely short-pilose beneath ; 



fruiting sepals about 2.5 cm. long 3. R. fusca. 



Venation of the lower surface of the leaves neither prominent nor reticulate. 



Leaves densely short-pilose beneath 4. R. pringlei. 



Leaves glabrous beneath or nearly so. 

 Leaves ovate or broadly ovate, widest at or below the middle, acute or 



acuminate 5. R. cuming-ii. 



Leaves mostly oblanceolate-oblong, widest above the middle, obtuse or 

 acutish 6. R. pallida, 



1. Ruprechtia macrosepala Standi., sp. nov. 



Sinaloa ; type from Varal, Municipalidad de Mazatlan {Dehesa 1508; U. S. 

 Nat. Herb. no. 1,012,464). 



Branchlets slender, brownish ; ocreae 2.5 to 3 mm. long ; petioles stout, 3 to 5 

 mm. long; leaf blades elliptic-ovate. 6.5 to 11.5 cm. long, 3 to 4.5 cm. 

 wide, obtuse or rounded at base, acute or acuminate at apex, green and 

 glabrous on the upper surface, slightly paler beneath, sparsely strigose along 

 the veins, the venation very prominent and finely reticulate ; pistillate racemes 

 numerous, laxly flowered, the flowers slender-pedicellate; calyx 3.5 to 4 cm. 

 long, densely appressed-pilose below, glabrate above; inner calyx lobes linear- 

 attenuate, 4 to 5 mm. iDng, the outer lobes ligulate-spatulate, reticulate-veined, 

 rounded at apex, tinged with red at first ; achene 8 to 9 mm. long, glabrous. 



2. Ruprechtia occidentalis Standi. Proc. Biol. Soc. Washington 33: 66. 1920. 

 Sinaloa ; type from San Bias. 



Shrub, about 3 meters high ; leaves 3 to 8 cm. long, 1 to 2.5 cm. wide, acumi- 

 nate to acutish. 



3. Ruprechtia fusca Fernald, Proc. Amer. Acad. 33: 86. 1897. 

 Puebla and Guerrero ; type from Acapulco. 



Shi'ub or small tree, 4.5 meters high, the trunk 20 cm. in diameter ; leaves very 

 thick, acute, with fulvous pubescence. 



4. Ruprechtia pringlei Greenm. Proc. Amer. Acad. 33: 476. 1898. 

 Oaxaca ; type from Tomellin Canyon. • 



Shrub or small tree. 4 to 6 meters high, with gray hark ; leaves oblong-ovate, 

 4 to 7 cm. long; fruiting calyx 2 to 2.5 cm. long. 



5. Ruprechtia cumingii Meisn. in DC. Prodr. 14: 170. 1856. 

 Veracruz. Central America and Colombia (type locality). 



Large or small tree with rounded crown ; leaves ovate, acuminate, compara- 

 tively thin, 4 to 7.5 cm. long, 1.8 to 3.5 cm. wide; fruiting calyx about 2 cm. long. 



