285 LEAFLETS Or PHILIPPINE BOTANY [Vor. I. Art. 16 
pubescent; the 7 to 9 nerves scurfy rusty brown beneath; 
petiole 8 mm. long, also scurfy brown, caniculate on the 
upper side, subtended by 3 to 5 mm. long acute stip- 
ules. Inflorescence cymosely paniculate, lateral upon the 
stem, 4 em. long, sometimes wider, scurfy brown; flowers 
dirty white, usually clustered at the ends of the dichotemous 
branchlets, sessile, staminate; perianth petaloid, united only 
at the: base, transparent, 3 mm. long, oblong to obovate, 
5 in number; stamens 5, opposite the segments; the filaments 
glabrous, with hyaline margins, inserted at the middle of 
the petaloidea and exceeding them, the upper one half strongly 
inflexed; anthers basifixed, 1.5 mm. long, 1 mm. wide, the 
base acutely lobed, the sacs bursting along the lateral 
edges; pistillate flowers and fruits not seen. 
Type specimen 7500, A, D. E. Elmer, Lucban, Province 
of Tayabas, Luzon, May, 1906. On wooded ridges of Mount 
Banahao at 900 meters. It was seen only once and there 
is some doubt as to the right genus. 
Bistorta viridescens n. sp. —Herbs, 2 to 5 dm. high; 
stems green, smooth. Leaves alternate, not bract like leaf 
opposed, distichous, divaricate, usually subfalcate, sessile, 
unequal, membranous or the younger ones flaccid, the 
normal blades 15 em. long and 3 em. wide, lanceolate, tips 
slenderly acuminate, bases subcuneate and unequally sided, 
glabrous, strigosely marked, viridescent but the upper 
surface somewhat darker, margins entire below the middle, 
coarsely and serrately toothed from the middle toward the 
apex; nerves prominent beneath, 3 from near the base, 
each lateral one connected with the strong midrib by 4 
to 6 cross bars. Involucre subtending the male flowers 
\ glabrous, viridescent green, obscurely flattened, hyaline mar- 
gined, confluent, 12 mm. broad, each bract abruptly termi- 
nated into an inrolled acuminate point; staminate flowers 
clustered, some sessile, others distinctly pedicelled; stamens 
sessile, 4, included by the hyaline 2 mm. long sepals, the 
subtending more or less hyaline bracts with a green midvein 
and delicately ciliate. 
Type specimen 8076, A. D. E. Elmer, Los Baños, Paes 
ince of Laguna, Luzon, April, 1906. 
