EUPATORIUMS OF ECUADOR. 347 



Sect. II. SuBiMBRiCATA (DC.) Hoffm. (see p. 281). 



Key to Species. 



. Leaves pinnately veined; shrubs or trees h. 

 b. Heads 4-r2-flowered c. 



c' Leaves ovate to broadly oblong, 8-13 cm. wide, pellucid- 



])unftate 14. E. morifolium. 



c. Leaves narrowly oblong, 1-2 cm. wide, not pellucid- 

 punctate 5. E. salicinum. 



h. Heads 14-40-flowered d. 



d. Leaves lance-oblong, cordate at base 6. E. glutinosum. 



d. Leaves not cordate; a group of very closely related and 



perhaps wholly artificial species likely to be found con- 

 fluent when better known e. 

 e. Erect shrubs or small trees /. 

 /. Branches tetragonal; leaves cuneate at base g. 

 g. Heads about 20-flowered; leaves elliptic-lanceo- 

 late, almost equally pointed at the ends, white- 

 tomentose beneath, 3 times as long as wide. .7. E. cacalioides. 

 g. Heads about 15-flowered; leaves oblong-lanceo- 

 late, gradually acuminate to the apex, more 

 abruptly cuneate at base, about 4 times as long as 



wide, yellowish-tomentose beneath 8. E. buddleaefolium. 



f. Branches hexagonal; leaves rounded at base or very 

 shortly acuminate to the point of attachment h. 

 h. Leaves white-tomentose beneath; erect shrub 



9. E. persicifolium. 

 h. Leaves delicately and somewhat obscurely pubes- 

 cent beneath; tree 10. E. arboreum. 



e. Climbing shrub; branches round, sulcate; leaves 

 rounded at the base, canescent-tomentose beneath 



11. E. salviaefolium. 

 , Leaves palmately 3(-7)-nerved from the base or from a point 

 somewhat above the base or if pinnately veined having 2 of 

 the lower lateral veins considerably longer and more conspicu- 

 ous than the rest i. 



i. Heads 4-12- or rarely (in E. lloense) as many as 16-flow- 

 ered j. 



j. Leaves strongly discolorous, the lower surface conspicu- 

 ously whitened by a minute lanulate pubescence; heads 

 about 11-flowered k. 

 k. Leaf-blade ovate-oblong, obtuse, rounded at the base 



12. E. origanoides. 

 k. Leaf-blade deltoid-ovate, acutish, cordate at the base 



13. E. niveum. 

 j. Leaves (when mature) never whitened beneath I. 



I. Heads thrysoid; leaves very large (12-20 cm. long, 8- 



13 cm. wide) 14. E. morifolium. 



I. Heads corymbed or loosely panicled ; leaves considera- 

 bly smaller ?«. 



?«. Inflorescence an open panicle n. 

 n. Heads 12-16-flowered; leaves ovate-lanceolate, 



glabrous beneath 15. E. lloense. 



