NOTES ON PHILIPPINE ORCHIDS, IV. 
5 
Habenaria Robinsonii sp. nov. 
Folia linearia, acuta. Bracteae aristatae. Pedunculus glab- 
ratus. Flores albi, 1 ad 4. Bracteae inflorescentiae aristatae. 
Sepala lateralia oblongi-ovata, subacuta, 3-nervia. Sepalum su- 
perius cucullatum, obtusum. Petala spathulata, obtusa, 1-nervia. 
Labellum 4-Iobatum; lobi laterales cuneati, truncati, lobi termi- 
nales rotundati. Calcar 4.7 cm longum. 
Whole plant from 10 to 27 cm high (including the inflo- 
rescence). Bulbs elongated, roots fleshy. Leaves linear, acu- 
minate, 5 to 13 cm long, 4 to 9 mm wide (average about 6 
mm), slightly contracted at the base, sheathing, passing rather 
abruptly into the sheathing, aristate bracts. Braets 3 or more, 
2 to 3.5 cm long, long-aristate. Raceme glabrous, slender, 
flowers 1 to 4 (rarely 4). Floral bracts 2 to 3 cm long, aristate, 
sheathing. Pedicel, together with the ovary, about 2 cm long, 
glabrous. Floivers large, white (in general aspect recalling 
H. militaris). Lateral sepals deflexed, oblong-ovate, subacute, 
3-nerved, about 7 mm long, 4 mm wide. Upper sepal cucullate, 
obtuse, about 8 mm long. Petals simple, spathulate, rounded 
at the apex, 1-nerved, 8 mm long, 2 mm wide near tip. Labellum 
very large in comparison with the other perianth-organs, about 
2 cm long, 2.5 cm wide, four-lobed, basal lobes cuneate, the free 
end obliquely truncated, 12 mm long, 9 mm wide at the tip, 
many-nerved. F7’07it lobes separated from the basal ones by 
a narrow isthmus 3 mm long, 2.5 mm wide, semi-rotund, margin 
slightly crenulate. (The front lobes might be more properly 
designated as the bifid or cleft middle lobe of the lip.) Stigmatic 
processes prominent, tapering, somewhat decurved, 2.5 mm long. 
Spur slender, longer than the ovary, 4.7 cm long. 
Luzon, Province of Laguna, Molauin River, C. B. Robinson, Bur. Sci. 
9666, Feb. 2, 1910, on rocks in the river, 50 to 150 m above sea level; Elmer 
D. Merrill 6S06, Feb. 9, on mossy boulders in stream bed. 
This very beautiful species bears a striking similarity to H. militaris 
from which it is readily distinguished by its very different leaves, long- 
aristate bracts, and white flowers. 
Habenaria rosulata sp. nov. 
Folia rosulata, linearia, acuta. Bracteae aristatae. Floi'es 
3 vel 4, albi. Bracteae inflorescentiae acutae, ovariis breviores. 
Sepala lateralia ovata vel ovato-lanceolata, subacuta. Sepalum 
superius ovatum. Petala linearia, 1-nervia, obtusa, simplicia. 
Labellum tripartitum, laciniae laterales media longiores. Calcar 
inflatum, processus stigmatis hippocrepiformes. 
Plant 1 to 2 dm tall, slender. Roots fleshy. Leaves rosulate, 
about 5, linear, acute, suberect or spreading, 2 to 4.5 cm long, 
