MULFOKD EXPLORATION OF THK AMAZON VALLEY 



361 



of the l)raets, (>roct, nearly 2 cm. long-, slender, Calj'x-tube hemi- 

 spheric, () to 9 nnu. broad, shorter than the triangular-acuminate, 

 subequal rigid erect or slightly spreading calyx-lobes. Corolla 

 scarlet, densely gray-pubescent, 3 cm. long, the greatest width, 

 as i^ressed, 8 nnn., the upper lip erect, about 8 mm. long, the 

 lower lip very short, recurved-spreading. Basal gibl)osity of 

 corolla 3 mm. long, oval, erect and appressed. Corolla ventri- 

 cose to about the middle, or a little higher, slightly contracted 

 above. Middle lobe of the lower lip f) mm. broad, and not so 

 long, the lateral lobes much broader. Upper lip about 1 cm. 

 broad, deeply emarginate, somewhat narrowed at the base. Sta- 

 mens moderately exserted, the anthers all coherent, but easily 

 separable in pairs. Filaments attached at the base of the corolla. 

 Two posterior glands of the disk large, slightly enuirginate, sub- 

 connate, the lateral glands closely adjacent, ligulate, the anterior 

 very small. Ovary conic, 5 mm. long, pubescent, like the style, 

 which at length exceeds the stamens. Stigma shortly 2-lobed, 

 recurved. 



Ixiamas, 1,500 feet, 0. E. White, December 13, 1921 {no. 

 1111) ; near Keyes, White, October 25 (no. 1534). "Growing in 

 bog-land, associated with a white orchid and grasses and sedges. 

 Flowers orange-scarlet. ' ' 



ACANTHACEAE 



Mendoncia robusta 



Entire plant yellowish by a dense covering of short mostly 

 appressed hairs, the upper leaf-surfaces scabrellate with minute 

 tufts. Stems quadrangular, stout. Petioles 3 to 5 cm. long, 

 rather stout, erect, the base sharply ujicurved and incurved, in 

 age becoming elongate and reflexed and twisted. Blades thick, 

 8 to 15 cm. long, 5 to 10 cm. wide, ovate, acute, with rounded base, 

 entire, the midrib and secondaries lightly prominent above, 

 strongly so beneath, the secondaries 4 or 5 on a side, ascending 

 and lightly curved, connected by slender tertiaries, the smaller 

 venation inconspicuous. Leaves on young shoots much larger 

 and narrower, oval or somewhat obovate, on shorter petioles, thi; 

 base slightly cordate. Peduncles one or two, stout, shorter than 

 the petioles. Bracts at length about 3 cm. long and broad, oval 

 with the summit rounded or subtruncate and minutely mucro- 

 nate, the midrib very strong, the secondaries prominent and 

 stout, interarching near the margin. Flower (but one seen) 

 twice the length of the bracts, apparently dark-red. Immature 



