COLOMHIAN EUPATORIUMS. 



271 



n. 



m. 



0. 



j. Leaves caudato-aouminate, 5-10 cm. lonp;; petioles 

 about 1 cm. Ions k. 



k. Pedicels mostly curved-ascending; leaves pubes- 

 cent on the nerves and veins beneath, dull above 



18. E. svbscandens. 

 k. Pedicels straight; leaves smooth and shining 

 above, nearly glabrous beneath i. 

 I. Leaves coarsely ])ellucid-punctate; veinlets 

 scarcely translucent; heads about 26-flowcred 



5. E. chrysostictum. 

 I. Leaves not i)unctate ; veinlets forming a trans- 

 lucent network; heads about I'i-tlowered 



G. E. dinphanophlebium. 

 h. Leaves narrowed to an acute or at least obtusely 

 pointed (not rounded) base m. 

 m. Scales much changed in texture toward the tip, 

 being there subherbaceous, pubescent, and often 

 somewhat squarrose n. 

 n. Scales, at least the middle and inner, acute; heads 

 more than 3 times as long as thick; leaves ovate- 

 lanceolate 10. E. iridolepis. 



Scales subtruncate or rounded; heads about twice 

 as long as thick; leaves linear- to oblong-lanceo- 

 late 11. E. ivaefolium. 



Scales little changed in texture (although often 



somewhat darker) toward the closely appressed 



tip 0. 



Leaves thickish but not rigid, small (2-4 or rarely 



-6 cm. long, including the short petiole), tomentel- 



lous above, canescent-tomentose beneath p. 



p. Leaves entire; achenes 3 mm. long, pubescent 



on the faces as well as the ribs 12. E. leivense. 



Leaves crenate-serrate; achenes 2.2-2.5 mm. 

 long, slightly hispidulous on the ribs only 



13. E. tacotanum. 

 Leaves somewhat firm in texture, lanceolate to 

 ovate, 4-6 cm. long, conspicuously bullate-rugose 

 and scabrid above, coarsely villous on prominently 

 exserted ribs and veins beneath, the hairs long, 



dark, and articulated 14. E. scabrum. 



Leaves rhombic-ovate to lanceolate, often with a 

 sUght hastate tendency, never strongly bullate- 

 rugose above, nor with conspicuously exserted 

 veins beneath q. 

 q. Heads sessile in pedicellate glomerules together 



forming dense corymbs 15. E. punctulatum. 



q. Heads, at least most of them, pedicelled r. 

 r. Heads very slender, 6-8-flowered, acute in 

 bud s. 

 s. Petiole relatively short, about one sixteenth 



as long as the blade 16. E. leptocephalum. 



s. Petiole (1-2 cm. long) about one fourth as 



long as the blade 17. E. barranguillense. 



r. Heads thicker, obtuse or obtusish in bud, 10- 

 35-flowered; petiole one fifth to one third as 

 long as the blade t. 



V- 



o. 



o. 



