34 ROBINSON. 



2-3 dm. high as opposed to plants of a meter or so in height, consider- 

 ably looser growth, and mostly herbaceous character. In E. Squiresii 

 and E. elatum the upper surface of the leaves is distinctly though 

 sparingly puberulent. In E. tovarense the leaves are lanceolate not 

 oblanceolate and are strikingly glandular-atomiferous beneath. E. 

 turbacensc is said to attain 2 m. in height. It has lanceolate to ovate 

 leaves 5-7 cm. wide, and its involucre is more campanulate and has 

 the scales usually 3-4-costulate. The florets are also somewhat more 

 numerous, 25-28. 



It is clear that E. Sprucei cannot at present be united with any of 

 these, yet they are all exceedingly close and may sometime be found 

 to intergrade. 



E. SQUALiDUM DC, var. Rusbyanum, var. nov., laxe ramosum; 

 caule ramisque flexuosis griseo-tomentellis ; pilis albidis minutis 

 plerisque incurvis non evidenter articulatis; foliis membranaceis 

 ovato-lanceolatis vel ovatis supra cum pilis minutis albis subappressis 

 sparse conspersis, subtus sordide tomentellis et glandulari-punctatis, 

 indumento densiusculo glandulas obscurante; capitulis 18-20-floris; 

 involucri squamis laevissimis saepissime brunnescentibus apice 

 rotundatis vel obtusis arete appressis ciliolatis; achaeniis 2.5 cm. 

 longis. — E. scabrum Britton, Bull. Torr. Bot. Club, xviii. 333 (1891), 

 not L. f. E. Martiusii Ktze. Rev. Gen. iii. pt. 2, 148 (1893), not DC. 

 — Bolivia: at Guanai in Prov. Larecaja, Dept. La Paz, alt. 610 m., 

 May, 1886, Rvsby, no. 1623 (type, N. Y., phot. Gr.); in Prov. (East) 

 Velaseo, Dept. Santa Cruz, alt. 200 m., July, 1892, Kimtze (N. Y.). 

 Peru: without locality, Matheios (N. Y.). 



This plant differs from E. scabrum L. f . considerably in the form and 

 texture of the leaves as well as in the much shorter not obviously 

 jointed pubescence. This variety may be distinguished from both 

 var. Martivsii (DC.) Bak. and var. stibvelidinum (DC.) Bak. by its 

 denser pubescence on the lower surface of the leaves, the hairs being 

 so close as to obscure almost wholly the glandular punctation which is 

 clearly evident, indeed rather conspicuous, in the varieties just men- 

 tioned. From var. tomentosum (Sch. Bip.) Bak. the present plant 

 differs in its distinctly smaller heads, fewer florets, more cylindrical 

 and less ovoid involucre, etc. 



E. Squiresii Rusby in Robinson, Proc. Am. Acad. liv. 258, 337 

 (1918). Soon after the publication of this species two specimens were 

 received at the Gray Herbarium of much interest in connection with 

 it. They were Dr. Pennell's nos. 3928 and 3929, collected in an 

 alluvial thicket, alt. 80-90 m., at Badillo, Rio Magdalena, Dept. 



