MULFORD EXPLORATION OF THK AMAZON VALLEY 



301 



Flowering- peduncles to 5 em. long, erect, terete, dilated at the 

 sunnnit. Bracts 10, distinct, unequal, shorter or longer than the 

 calyx, linear or slight^ broader above, obtuse, thick, with very 

 strong midrib. Calyx 15 to 18 mm. long, the sepals nearly dis- 

 tinct, lanceolate, acutish, very thick, 3-nerved, the midrib very 

 stout. Corolla about 5 cm. long, papillose or scurfy externally, 

 light-yellow with reddish center. 



Near Reyes, 1,000 feet, 0. E. White, October, 1921 {no. 1538). 

 "A foot or two high, in jmmpas, in sunshine." 



Hibiscus rhomboideus 



Densely gray-tomentose throughout. Stem stout, terete, 

 branched above. Stipules very small, linear or setaceous. Peti- 

 oles 3 to 5 mm. long, very thick. Blades 3 to 4 cm. long and 

 nearly as wide, ovate with truncate subcordate base and blunt 

 sunnnit, very finely crenate-dentate, thick, gray-green on both 

 sides, 5-ribbed, the ribs thick, prominent beneath, the secon- 

 daries only one or two on a side. Flowers several, crowded at 

 the ends of the branches, the pedicels very short. Bracts linear 

 or stoutly setaceous, mostly a little shorter than the calyx, 1.5 

 cm. long, divided half way, the lobes ovate, acute, thick, with 

 strong midrib. Corolla (imperfect) apparently about 5 cm. long. 

 Style-branches 10, about 2.5 mm. long, the stigma capitate. 



On the pampas, near Lake Rogagua, 1,000 feet, //. H. Rushy, 

 October 28, 1921 {no. 1383). "Scarce, in muddy places, the 

 flowers rose-colored." 



BOMBACACEAE 



Bombax rurrenabaqueana 



Glabrous. Petioles 3 to 8 cm. long, slender, grooved on the 

 upper surface, the stipules subulate, acute, thick, rigid, 2 mm. 

 long. Leaflets 5, occasionally 7 in my specimen, subsessile, 7 to 

 15 cm. long, 2 to 5 cm. wide, oblaneeolate, the summit rounded, 

 often slightly refuse and with a minute apiculation, the base 

 sharply acuminate, entire, thin, pale beneath, the venation slen- 

 der, prominent on both sides, strongly and rather coarsely re- 

 ticulate, the secondaries about 10 on each side, crooked, w^idely 

 spreading, then falcate and interarching a short distance from 

 the margin. Flowers (always?) two together, the peduncles 

 about 1.5 cm. long, very thick, ferruginous like the calyx, which 

 is 2 cm. long, 1 cm. wide, cupulate, ferruginous-tomentose, trun- 



