MULFORD EXPLORATION OF THE AMAZON VALLEY 



213 



iiii;' into the floral bracts, which ai'e more than 3 cm. broad and 

 l)ut little longer, and obtuse, thin, and reddish or pnrple. Calyx 

 2 or 2.5 cm. long-, the sepals rigid, lanceolate, attenuate, the 

 corolla one cul longer. Stamens and style about equaling the 

 petals, or nearly so, the style blackish below, white toward the 

 summit. 



Rurrenabaque, 1,000 feet, 0. E. White, November 25, 1921 

 {no. 1811). 



"Epiphytic on trees in dark shady ravines." 



SmIIvACACEAE 



Smilax flavicaulis 



Glabrous, the stems terete, light-yellowish-brown, finely 

 many-ribbed. Spines few, strongly compressed laterally, small 

 and nearly as broad as long. Tendrils simple, terete, not greatly 

 elongated, borne near the middle of the petiole, which is 1.5 to 

 2 cm. long, flattened, the margins strongly involute, the base 

 clasping and spinose-auriculate. Leaf-blades 7 to 15 cm. long, 

 4 to 8 cm. broad, varying from lanceolate or even oblong to 

 broadly ovate, mostly acute, with rounded or truncate base, thick 

 and coriaceous, the venation sharply prominent on both sides, 

 especially beneath, a pair of strong nerves or ribs starting at 

 some distance above the base and converging at the apex, a pair 

 of slender nerves starting very near the base and becoming sub- 

 marginal, all connected by a strong and cfose reticulation. Pe- 

 duncles simple, axillary, 2 to 4 cm. long, slender, strongly ver- 

 tically flattened. Umbels simple, densely many-flowered, the 

 pedicels about 1 to 1.5 cm. long, more or less flattened, ribbed, 

 the basal bracts numerous, shortly triangular, subulate, acute. 

 Flowers not seen. The young fruits are shorth' and stontly 

 stipitate. 



In dry places on the pampas about Lake Rogagua, 1,000 feet, 

 H. H. Rushy, November 8, 1921 {no. 1698). 



Amaryllidaceae 



Atamosco microcarpa 

 Glabrous. Bulb spheroidal, 2 to 3 cm. long. Leaves 1 dm. 

 or more long, sometimes equaling or exceeding the flower, nar- 

 rowly linear, obtuse. Scape flliform, one-flowered. Bract soli- 

 tary, 2 cm. long, 2 mm. wide, lance-linear, the summit bifid, the 

 teeth obtuse. Peduncle filiform, 3 cm. long. Ovary 2 mm. long. 



