MULFORD EXPLORATION OF THE AMAZON VALLEY 



329 



Macropharynx fistulosa 



ToRKMitollate tliroug-liout. Intoriiodes very Ions', fistulous. 

 Petioles to 4 or 5 cm. loiio-, broad, the margins involute, ciliate. 

 Blades to 2 dm. long and nearly as broad, ovate with shallowly cor- 

 date and often oblique base and mucronate summit, entire, thin, 

 deep-green and sparsely tonientellate above, where the mid-rib 

 is channeled, ferruginous-tomentellate beneath, where the broad 

 midrib and secondaries are prominent, the secondaries opposite, 

 about 10 ]mirs, widely spreading and lightly curved, the remain- 

 ing venation obscure. Racemes axillary, few-flowered, the rachis 

 roughly nodose. Pedicels slender, 1 or 2 cm. long, clothed Avith 

 numerous bracts which are unequal and 1 to 2 cm. long, sinuous, 

 narrowly linear and attenuate, and extending to and sometimes 

 upon the base of the calyx. Calj^x truncate at the base, deeply 

 parted, the lobes similar to the bracts, but a little wider. Corolla- 

 tube 12 mm. long, narrower than the infundibular throat, which 

 is 2.5 cm. long the limb 3 cm. or more wide, the lobes broad and 

 rounded. Anthers 9 mm. long, the basal lobes setaceous, 2 mm. 

 long. Ovaries 1.5 mm. long, twice as long as the disk. Style 

 filiform. 



Rurrenabaque, 1,000 feet, M. Cardenas, December 1, 1921 

 {no. 1894) ; and at same place, 0. E. White, January 30, 1922 

 (no. 2360). Mr. Cardenas says "Flowers white, fragrant." Mr. 

 White says " 'Claro bejuco'. A vine to 30 or 40 feet, or more, 

 on trees. Flowers greenish-cream, with faint red tinge on petal- 

 lobes. Flowers have a very strong clove-like odor." The flowers 

 of no. 2360 are smaller and somewhat differently proportioned, 

 and may possibly represent a second species. 



Prestonia cornutisepala 



Tomentose throughout. Stems elongate, stout, terete. Peti- 

 oles 1 or 2 cm. long, stout and broad, the margins involute, 

 slightly peltately attached, but the base of the blade adnate. 

 Blades to 1.5 dm. long and more than 1 dm. wide, ovate with 

 broadly rounded base and abruptly very short-acuminate and 

 acute summit, entire, thin, the upper surface deep-green, very 

 shortly, densely, closely and finely tonientellate, the lower sur- 

 face strongly ferruginous-tomentose, with the stout midrib and 

 secondaries and the finer venation all prominent. Secondaries 

 about 12 on each side, mostly subopposite, widely spreading and 

 falcate at the ends, connected by very numerous crooked terti- 



