172 
MERRILL. 
about 600 m; Iwahig, in bed of mountain stream, altitude about 300 m, Merrill 
7 58, February, 1903, specimen very young. 
This species is probably most closely allied to Cladium riparium Bentli., of 
Australia, and to the var. crassum (Thwaites) Clarke of India and Ceylon; it is, 
apparently, distinct from both forms. Among the Philippine species it is prob- 
ably most closely allied to Cladium distichum Clarke but lacks the numerous 
imbricated glumes of that species. 
Cladium filiforme sp. nov. § Eucladium. 
Caespitosum, tenerum, circiter 40 cm altum; foliis angustis, planis, 
elongatis, in sicco pins minus plicatis, margine scabridis; panieulis laxis, 
angustis, thyrsoideis; spiculis paucis, lanceolatis, brunneis, circiter 5.5 
mm longis, 1-floris; fructibus nitidis, ovoideis vel ellipticis, albidis, ses- 
silibus, vix rostratis. 
A caespitose perennial about 40 cm high, slender. Stems terete, about 
1.5 mm in diameter. Leaves mostly basal, slender, about 20 cm long, 
1.5 mm wide, scabrid, apparently plane when fresh, more or less folded 
when dry, the culm leaves two or three, similar to the basal ones. Pani- 
cles slender, thyrsoid, comparatively few-flowered, narrow, rather lax. 
Spikelets lanceolate, brown, 5 to 6 mm long, their pedicels slender, 2 to 
8 mm in length, each group of three or four spikelets subtended by a 
setaceous, scabrid, leaf-like bract 1 cm long or less. First two glumes 
empty, lanceolate-ovate, acuminate, about 3 mm long. Third glume in- 
closing a perfect flower, narrowly oblong, acuminate, 3.5 mm long, thicker 
than the empty glumes. Stamens three; anthers linear, 2 mm long. 
Nutlet ovoid or ellipsoid, white and shining, sessile, not beaked, gla- 
brous ; style 5 mm long, divided to the middle into three arms. Fourth 
glume similar to the third, empty, the fifth smaller and thinner, also 
empty. 
Palawan, Mount Victoria, Bur. Sci. 717 Foxworthy, March 24, 1906, on rocks 
at base of a waterfall, altitude about 600 nr. 
A species characterized by its slender habit, slender leaves and panicles, some- 
what resembling Cladium undulatum Thwaites but smaller and with no traces of 
hypogynous bristles. 
SCIRPUS Linn. 
Scirpus lacustris Linn. Sp. PI. (1753) 48; Clarke in Hook. f. FI. Brit. Ind. 
6 (1893) 658. 
Luzon, Province of Cagayan, Buguey, For. Bur. 17290 Curran, March,. 1909, 
a common and conspicuous plant in lagoons back of the town. 
Frequent in fresh water nearly throughout the world, except South America 
and Malaya. Not previously reported from the Philippines. 
XYRIDACE2E. 
XYRIS Linn. 
Xyris anceps Lam. 111. 1 (1791) 132; Hook. f. FI. Brit. Ind. 6 (1892) 364. 
Luzon, Province of Isabela, Carig, Bur. Sci. 8065 Ramos, May, 1909. Seme- 
rara, Merrill \151, June, 1905. 
