12 New Species of South Ameeican Plants 



long, 3 to 6 cm. broad, obovate, with rounded or sub-truncate 

 base and abruptly short-acuminate and acute summit, thick- 

 ish, serrate-dentate, with sinuate sinuses and very small obtuse 

 or acutish teeth, very deep-green, somewhat 3-nerved, the 

 secondaries about 6 or 7 on a side, strongly ascending, the vena- 

 tion strongly reticulate, the branches of the lateral nerves form- 

 ing a looped line near the margin. Spikes mostly 5 to 8 cm. 

 long, some twice that length. Bracts of the flowers 2, con- 

 spicuous, ovate, acuminate, erect-spreading. Pistil sub-sessile, 

 ovoid, acuminate, coarsely few-setose, the style stout, angled, 

 purple, the stigmas large, short-pilose, light-brown. 



"Polo-Polo, near Coroico, Bolivia, 1,100 M. altitude, No- 

 vember, 1912." (Otto Buchtien, No. 3757.) 



Roupala discolor. 



Inflorescence tomentellate, otherwise glabrous. Branch- 

 lets stout, flexuous, dark purple. Petioles 3 or 4 cm. long, 

 slender, channeled above, ferruginous in the groove and in the 

 axil, the blades 6 to 12 cm. long, 4 to 8 cm. broad, ovate, the 

 base rounded or truncate, some very slightly produced into 

 the petiole, the summit abruptly contracted into a long, narrow, 

 very acute acumination, the margin obsoletely serrate, some of 

 the small erect teeth acute; deep green above, whitish under- 

 neath, the venation slender, lightly prominent underneath, 

 the principal secondaries about 7 on each side, lightly ascending. 

 Racemes longer than their leaves, short-peduncled , the rachis 

 gray- tomentellate, rather densely flowered, the flowers mostly 

 in twos, their pedicels stout, about a third the length of the 

 flowers. Buds just previous to expanding about 8 ram. long, 

 the middle portion about half as thick as the basal and about a 

 third as thick as the oblong head. Lobe of perigone slightly 

 broader toward the obtuse summit, the stamen attached aboOt 

 two-t xirds of the way from base to summit and shorter than 

 the latter, its filament about a fourth of its length, the terminal 

 appendage very slight. Ligules of the disk 4, white, thin, about 

 a third the length of the ovary, broader than long, narrowed at 

 the base. Ovary nearly half the length of the pedicel, pilose. 

 Style contracted in the middle third. 



"A forest tree, valley near Jiracasaca, January 13, the' flow- 

 ers white, fragrant." (Herbert H. Smith, Colombia, No. 901.) 



Struthanthus divariacatus. 



Glabrous, the branchlets elongated, slender, terete, the 

 intemodes about 6 cm. long. Petioles i to 1.5 cm. long, chan- 

 nelled above and with a cartilaginous margin. Blades 4 to 7 

 crn. long, i to 3 cm. broad, lance-ovate, biacuminate and acutish, 

 thin, bright-green, the secondaries very slender and the vena- 



