356 ROBixsox. 



Lehnann, no. 5686 (N. Y.); near Balao, Eggcrs, no. 14,086 (N. Y.). 

 Pichixcha: in subtropical region, alt. 2000 m., near Xiebli, Sodiro, 

 no. 6/22, ace. to Hieron. 1. c. Prov. not indicated: wathout locality, 

 Jameson (sk. and fragm. Gr.). 



27. E. MiCROSTEMON Cass (see p. 295). E. guadalupense DC. Prod. 

 V. 170 (1836) and probably of Hieron. in Engl. Bot. Jahrb. xxix. 12 

 (1900), excl. syn. " E. Sinclairii" [Sinclairi], although described as 

 "herba prostrata." — Chimborazo: San Jose, on western slopes of 

 Mt. Chimborazo, Andre, no. 6 of his second series (Gr.); ? in woods 

 of subtropical valleys, Pallatanga, Sodiro, no. 6/29, ace. to Hieron. 

 1. c. (as E. guadalupense). 



Sect. HI. ExiMBRiCATA (DC.) Hoffm. (see p. 303). 



Key to Species. 



a. Leaves coriaceous h. 



b. Leaves (the mature cauline) cordate c. 



c. Delicate flexuous herb; leaves 3-nerved from the base, 



2-2.5 cm. long 4L E. cuencanum. 



c. Viscid shrub; leaves feather-veined, 7-12 cm. long. .6. E. glutitiosum. 

 b. Leaves not cordate (/. 



d. Heads 3-12-flowered e. 



e. Leaves pubescent beneath 18. E. prunifoUum. 



e. Leaves glabrous on both surfaces /. 

 /. Heads 3-7-flowered ; very closely related species 

 likely to prove more or less confluent when known 

 from more copious material g. 

 g. Leaves more or less nerved, either 3-nerved from 

 the base or with 2 pairs of nerves one nearly basal 

 the other starting somewhat above the base h. 

 h. Leaves 5-13 cm. long, 2.4-4.5 cm. wide. . .28. E. pseudochilca. 

 h. Leaves 3-4 cm. long, 1.8-2.G cm. wide i. 

 i. Leaves obsoletely serrulate above the middle; 



teeth 4-7 on each side 29. E. utnbrosutn. 



i. Leaves serrate-dentate at least above the 



middle; teeth 9-19 on each side. . . .30. E. cotacachense. 

 g. Leaves truly feat her- veined, the lower veins not 

 enlarged or more conspicuous than the others j. 

 j. Leaves 3-9 cm. long; reticulation relatively 

 coarse (ultimate areolae about 1 mm. in diame- 

 ter); petiole 8-10 mm. long 31. E. cxscrio-vcHosuiu. 



j. Leaves 9-12 cm. long: reticulation very fine 

 (ultimate areolae about 0.5 mm. in diameter); 



l)etiolc about 2 cm. long 32. E. dcndroidcs. 



/. Heatis about 12-flowered 33. E. fa^^tigioluni. 



J. Heads 20- v.-flowered k. 



k. Leaves elliptical, rounded at base; petiole about 



5 mm. long 34. E. clegatis. 



