MULFORD EXPLORATION OF THE AMAZON VALLEY 



325 



Rushij, September 21, 1921 {no. 753). Species near T. crispi- 

 flora K. Scliimi. 



Echites rigida 



Glabrous. Stems rather stout, reddish-purple. Petioles 1 to 

 1.5 cm. long, dilated at the base, the interpetiolar lines strong. 

 Blades to 9 cm. long and 4 cm. wide, subelliptic, minutely mucro- 

 nate, thick, deep-green, the midrib prominent beneath, the slen- 

 der secondaries about 10 or 12 on each side, widely spreading, 

 straight, with the ends upcurved, connected by the tertiaries. 

 Cymes short-peduncled, bifurcated, densely flowered, the rachis 

 strongly nodose. Pedicels about 1.5 cm. long, upwardly thick- 

 ened and angled. Calyx about 5 mm. long, divided about mid- 

 way, the tube cupulate, thickish like the ovate obtuse lobes. 

 Corolla-tube about 12 mm. long, rather stout, sharply constricted 

 at about the middle, the limb rotate, 2 cm. broad, the lobes broad 

 and rounded. Calyx-tube lined with a ring of 10 broadly ovate 

 green scales which are about twice the height of the 5-lobed black 

 disk, the latter nearly equaling the ovaries. Corolla naked 

 within. Stamens attached at the constriction of the tube, the 

 anthers sessile, 4 mm. long, slightly sagittate. 



Kurrenabaque, 1,000 feet, M. Cardenas, January 25, 1921 {no. 

 2042). Species very near E. Sanctac-crucis S. Moore. 



Echites bracteosa 



Scabrous, with the exception of the lower leaf-surfaces, which 

 are softly tomentellate between the principal veins. Branches 

 slender, climbing, terete, reddish. Petioles 5 to 10 mm. long, 

 broad. Blades 7 to 10 cm. long, 3 to 5 cm. broad, oval or ovate, 

 with very slightly cordate base and shortly acuminate and very 

 acute summit, entire, thickish, the upper surface deep-green, 

 with the venation mostly impressed, scabrous, the lower surface 

 softly tomentellate, gray-brown, the slender reddish midrib and 

 secondaries lightly prominent, the latter about 8 on each side, 

 ascending and connecting near the margin. Raceme simple, 

 stoutly peduncled, densely flowered, becoming secund, the pedi- 

 cels articulated into slightly cup-shaped depressions. Young 

 buds concealed by the imbricate bracts, which are about 1.5 cm. 

 long, narrowly lanceolate and attenuate. Pedicels extremely 

 short. Calyx-tube 2 mm. broad and not so long, campanulate 

 with slightly contracted summit, the teeth about 2 mm. long, 

 subulate, attenuate. Corolla-tube proper scarcely as long as the 

 calyx, the cylindric throat 3 cm. or more long, curved, the middle 



