MULFOKD EXPLORATIOX OF THE AMAZON VALLEY 



297 



and lax. Stipules small, subulate with setaceous summit. Peti- 

 oles to 1.5 cm. lon<;-, slender. Blades to 5 cm. lono;, 4 cm. wide, 

 deltoid-ovate, with truncate or subcordate base, obtuse or acut- 

 ish, entire or obscurely crenate-dentate, the 5 nerves strong- and 

 prominent beneath, lightly impressed on the green upper sur- 

 face. Panicle large, very lax and open, the branches almost 

 filiform, subtended by minute leaves. Plowers sohtary on long 

 filiform pedicels. Calyx 4 mm. broad, divided more than half 

 way, the lobes ovate, acutish. Fruit 7 mm. broad, the carpels 

 rostrate, the beak short, stoutly conic, acute, spreading. 



On the pampas near Lake Kogagua, 1,000 feet, M. Cardenas, 

 November 4, 1921 (no. 1623). Species closely resembling W. 

 Fadyenii. It is also near W. periplocifolia, but the form of its 

 very small carpels is quite different. 



Pavonia ageratoides 



Finely puberulent, and pilose with longer divergent rigid 

 white hairs. Stems stout, the branchlets short and leafy. Stip- 

 ules mostly reflexed, about 4 mm. long, subulate, acuminate and 

 acute, green. Petioles 1 to 3 cm. long, slender, divergent or 

 somewhat reflexed. Blades 2 to 4 cm. long and about equally 

 broad, ovate, cordate, acute or very shortly acuminate, finely 

 and regularly crenate-serrate, thin, deep-green above, gray- 

 green beneath, slenderly 5- to 7-nerved. Pedicels axillary, soli- 

 tary, very slender, twice as long as the petioles. Bracts mostly 

 7, about 8 nun. long, 0.5 nun. wide, linear, acute, herbaceous, 

 pilose. Calyx about two thirds the length of the involucre, lobed 

 about half way, herbaceous, pilose, the lobes ovate, obtusish. 

 Corolla 2 or 3 times as long as the calyx, yellow but drying to 

 pink, finely veined. Stamens al)out two thirds the length of the 

 petals. 



Canamina, 4,000 feet, 0. E. White, July 21, 1921 {no. 276). 

 "A herb, 6 to 15 inches high, in sunny places along irrigating 

 ditches, the flowers yelloAv." 



Pavonia canaminensis 



Softly tomentellate with stellate hairs. Stems stout, the 

 branchlets short. Stipules 1 cm. or more long, subulate with 

 elongate linear summit. Petioles about 5 mm. long, stout. 

 Blades 3 to 10 cm. long, 2 to 5 cm. wide, ovate with rounded base 

 and acute summit, irregularly serrate-dentate, thickish, deep- 



