256 Vermischte neue Diagnosen. 
two are in season at once, closely appressed into the channel of the 
bracts until near anthesis, when they become erect by the upward bend- 
ing of the pedicel, but quickly deflexed again by a sharp bend of about 
90° appearing in the perianth above the ovulary, whence the name 
geniculata; free sepal always on the lower side after deflection and more 
strongly bent, forming a decided lip; pedicels and ovulary greenish- 
yellow, sepals yellow, as are the petals.except for a bright patch of dark 
green on the lower edges of the two exposed by the reflexed lip. 
The type is growing in the greenhouses of the New York Botanical 
Garden, no. 19668, and herbarium sheets are preserved in the same in- 
stitution. Its native habitat is unknown. It came from the Department 
of Parks of the Borough of the Bronx in 1902, where it had been in 
cultivation for some time. It flowers in December. 
Of the older species, B. geniculata is most similar to Bihai brasiliensis 
which, however, is smaller, has fewer, ascending, bracts, and quite diffe- 
rently colored flowers. 
208. Fuirena cylindrica B. F. Bush in Rep. Missouri Bot. Gard. XVI 
(1905), p. 91. 
Rootstocks short, thick; stems tall, slender, not very leafy, 3 to 4 dm 
tall; leaf-blades short, flat, thin, smooth above, closely pubescent beneath, 
2 to 4 cm long, 2 to 3 mm wide; sheaths very short, smooth; spikelets 
sessile, 2 to 5 together in the capitate clusters, oblong or mostly cylin- 
drical, 11 to 20 mm long, 3 to 5 mm in diameter; scales obovate, deep 
. reddish-brown, more or less.hispid-pubescent, 3-nerved, each tipped with 
a stout erect hispid awn nearly as long as the body; sepals 3; blades 
spatulate or fiddle-shaped, tapering at the base, nearly sessile, obtuse 
and rounded at the apex, the lower half semi-translucent, the upper half 
thick and granular-incrusted, awnless, or with a short, slightly down- 
wardly-barbed awn from the apex; perianth-bristles longer than the 
achene and sepals, nearly or quite smooth; achenes oblong, triquetous, 
tapering at the base, light yellow at maturity, tipped by the antrorsely- 
hispid style, which is as long as the achene. — Sandy soil, southern 
Texas, Summer and autumn. 
The only specimen seen is that of the type, collected in the Valley 
of the Rio Grande, below Dona Ana, Donna Ana County, New Mexico, 
by Mexican Boundary Survey 1523, 1848, in part, the other two plants 
on this sheet being, one, an Eleocharis, the other F, simplex (N). 
It has been referred to F. simplex macrostachya (Britton) Coville, but 
differs conspicuously in the cylindrical spikelets, slender stems, small 
leaves, and especially in the shape of the sepals and position of the awn- 
209. Fuirena ciliata B. F. Bush in Rep. Missouri Bot. Gard., XXI (1905), 
p. IT 
Rootstocks stout, elongated, tuber-bearing; stems stout, leafy, 4,5 to 
6 dm tall, densely and softly pilose with long white hairs: leaf blades 
numerous, 3 to 8 on the stems, broad and long, 5 to 15 em long, 4 to 6 
mm wide, densely pilose on both sides, and ciliate on the margins with 
