MULFORD EXPLORATION OF THE AMAZON VALLEY 



317 



This species is closely related to the widely distributed and 

 extremely variable J. nervosa Poir., but its slender habit, smaller 

 size and flowering- appear to exclude it. 



J. marginata Rusby now appears to me to be an extreme form 

 of J. nervosa Poir, with cordate leaves, having lustrous upper 

 surfaces, that seems to represent this species on the southern 

 pampas. 



Jussieua biacuminata 



Glabrous. Stems aquatic, a meter high, erect, sparingly 

 branched, the branches erect, the base and lower portion of 

 stem much spongy-thickened. Leaves sessile, very unequal, to 

 1.5 dm. long and 4 mm. wide, sometimes much larger at the base, 

 acuminate and acute at both ends, entire, thick and somewhat 

 fleshy, the midrib very thick and prominent. Pedicels filiform, 

 5 or 6 mm. long, usually bearing one or two subulate bracts near 

 the smmnit. Calyx-tube infundibular, a little more than half 

 the length of the pedicel. Calyx-lobes in anthesis widely spread- 

 ing, 3 or 4 mm. long, ovate, acuminate and acute. Petals white, 

 little exceeding the sepals. Fruiting pedicel not elongate, the 

 capsule 2.5 cm. long, 3 mm. broad, linear, straight or curved, 

 8-nerved, the calyx-lobes i^ersistent or at length deciduous. 



In swamps about Lake Rogagua, 1,000 feet, H. H. Rushy, 

 November 3, 1921 (no. 1601). "Growing in water, 3 or 4 feet 

 high, the flower white." 



Fuchsia filipes 



Glabrous, the numerous branchlets elongated and slender. 

 Petioles very slender, 3 to 5 mm. long, the blades 2 to 4 cm. long, 

 5 to 10 mm. broad, lanceolate and mostly a little inequilateral, 

 regularly acuminate at both ends, more so at the summit, sub- 

 entire, thin and herbaceous, deep-green above, pale beneath, the 

 secondaries 4 or 5 on a side, slender, strongly ascending, the 

 smaller venation obscure. Flowers mostly one or two in each 

 axil, the filiform pedicels about 1 cm. long, up to 2.5 cm. in fruit. 

 Flowers scarlet, short-pilose, 2 cm. long, slender, the linear- 

 oblong ovary about one sixth, the corolla-tube nearly half of the 

 length, the latter narrow-infundibular, sharply constricted above 

 the ovary, the lanceolate calyx-lobes at length spreading, the 

 margins increasingly involute toward the summit, where they be- 

 come closed, with a black tip. Petals ovate, very thin, paler than 



