330 CONTRIBUTIONS FROM THE NATIONAL, HERBARIUM. 



Stems and petioles not hispid or, if so, the bristles gland-tipped. 

 Stems and petioles with gland-tipped hairs. 



Leaflets sparsely hairy beneath or glabrate 7. R. verae-crucis. 



Leaflets densely pubescent beneath 8. R. adenotrichos. 



Stems and petioles without gland-tipped hairs, the inflorescence 

 sonietinses glandular-hairy. 

 Stems climbing or trailing; inflorescence conspicuously pricklj'. 



Leafl<ets lance-ovate, long-acuminate 17. R. nelsonii. 



Leaflets broadly ovate or oval. 



Leaflets oval, rounded or obtuse 20. R. alnifolius. 



Leaflets ovate, short-acuminate or acute. 



Teeth of the leaflets broadly ovate ; inflorescence with 



gland-tijiped hairs 18. R. palmeri. 



Teeth of the leaflets lanceolate, directed upward ; in- 

 florescence without gland-tipped hairs. 



19. R. sapidus. 

 Stems not climbing or trailing; inflorescence usually not prickly. 

 Drupelets pubescent ; inflorescence prickly. „ 



Leaflets cordate at base, soft-pubescent. ' 



9. R. philyrophyllus. 

 Leaflets not cordate at base, sparsely pubescent. 



10. R. liebmannii. 

 Drupelets glabrous ; inflorescence slightly or not at all prickly. 

 Petals at least twice as long as the sepals. 



Leaflets closely serrate with numerous sharp lanceolate 



teeth; ilrupelets few 11. R. coriifolius. 



Leaflets dentate with numerous small, rather distant 



teeth; drupelets numerous 12. R. schiedeanus. 



Petals slightly if at all exceeding the sepals. 



Leaflets regiilaidy dentate with rather short teeth, never 

 cordate at base. 

 Inflorescence glandular and tomeatose; leaflets pilose 



on the upper surface 13. R. macrog-ongylus. 



Inflorescence not glandular; leaflets finely stellate- 

 pubescent on the upper surface 14. R. smithii. 



Leaflets closely and irregularly or doubly serrate Mith 

 lanceolate antrorse teeth. 

 Inflorescence copiously glandular-pubescent; inflores- 

 cence lax 15. R. uhdeanus. 



Inflorescence very sparsely or not at all prickly; in- 

 florescence den.se 16. R. abundus. 



1. Rubus pumilus Focke, Abh. Nat. Ver. Bremen 4: 155. 1874. 

 Chihuahua to Mexico, in mountain woods; type from San Andres. 



Stems creeping and rooting, sparsely prickly, with shredded bark ; leaves reni- 

 form, simple, 3 to 4 cm. wide, often 3-lobed ; flowers white ; fruit red. 1 cm. broad. 



2. Rubus g-laucus Benth. PI. Hartw. 173. 1845. 



Morelos to Chiapas. Southward to Ecuador, the type locality. 



Shrub, 1 to 3 meters high, the stems glaucous ; leaves pinnate, the 3 leaflets 

 ovate, 6 to 15 cm. long, white-tomentose beneath; flowers white: fruit dark 

 purple, 1.2 to 2 cm. long. 



3. Rubus eriocarpus Liebm. Nat. For. Kjobenhavn Yid. Medd. 1852: 162. 1853. 

 Veracruz and Puebla ; type from Chlnantla, Oaxaca. Central America. 



