n 
OUCIIIDAOEa': HALCONENJSKS. 319 
Pedicels of tlie lowermost flowers about 1 cm. long, very slender. Lateral 
sepals elliptic to suborhiciilar, relatively small, about 3 mm. long, very 
obtuse. Upper sepal oblong, obtuse, convex, 4.5-5 mm. long. Petals 
linear, about 4 mm. long. Labcllum auriculate; auricles (or lateral 
lobes) dolabriform, obtuse, 5.5 mm. long, about 3 mm. wide; luiddle lobe 
4 mm. wide, oblong; G.5 mm. long, from the rounded ti]> to base of 
column ; monocallose at the base. 
Tcncrstrial in forests at 1,000 ft. alt. along the Binabay Riv*^r, Dec. 4, 1000, 
Merrill (No, 5804), 
Microstylis (§ Eumicrostylis) dentata Ames sp. nov. 
Leafy plants with elongattnl strict racemes of small flowers. Leaves 5 
or G, lanceolate, very acute, about 10 cm. long, 2—3.5 cm. wide, bases 
imbricating, sheathing the stem. Peduncle elongated, 2-5 dm. long, 
often copiously braeteate. Bracts linear, dcflexed, about 1 cm. long. 
Lateral sepals elliptic, very obtuse, 2 mm. long, about 1.5 mm. wide. 
Upper sepal siiuilar to the laterals. Petals elliptic-oblong, very obtuse, 
about 2 mm. long. Labellum 3-lobed, auriculate; auricles obtuse, 1 mm. 
long; middle-lobe oblong, bifid, 1 mm. long; on the anterior margin of 
each lateral lobe 3 acute teeth are situated; at the base of the labcllum 
under the colunm is a minute callus. 
In forests at about 3,000 ft. alt. along the Alag River, Nov., 1000, Merrill (No, 
580G) type.— In forests on Mount Halcon, Nov., 1906, Merrill (No. 580S). 
Microstylis (§ Eumicrostylis) Hutchinsoniana Ames sp. nov. 
A species well characterized by the large, rotund, overlapping auricles 
of the 3-lobed labellum. Plants about 2 dm. tall. Leaves ovate, acumi- 
nate, 4-6 cm. long, about 2.5 cm. wide, petiolate. Petioles 2 cm. long. 
Peduncle graceful, exceeding the leaves. Bracts linear, acute, the .lower- 
most, 6 mm. long. Flowers comparatively large, about 5 mm. across, 
pale purple, odorless (greenish when dry). Pedicels very slender, 5-7 
nun. long. Lateral sepals elliptical, very obtuse, 3 mm. long, margin 
very strongly revolute. Upper sepal 3.5 mm. long, somewhat narrower 
in relation to its length than the lateral sepals. Petals linear, obtuse, 
about 3 mui. long. Labellum 3-lol)ed, lobes su1)e(]ual ; middle lobe 
broadly oblong, rounded at the tip, very obtuse, 3.5 mm. long from tip 
to base of column, about as broad as long; lateral lobes rotund or sub- 
reuiform, overlapping behind the column, 1 inm. long. 3 mm. wide. 
Terrestrial in forest at 2,.'J00 fi. alt. on AFnunt TTnlcon, Nov. 9, 1006, Merrill 
(No. 580!)). 
This species in named in honor of Mr. W. 1. Hutchinson, who was a member of 
the Mount Halcon Expedition. 
Microstylis (§ Commelinoides) Merrillii Ames ap. nov. 
Distantly related to M. commeUmfolia ZolL, from which it is to be 
distinguished by the very different, larger leaves and dissimilar flowers. 
Plants creeping, rooting at intervals. Hoots long, slender, few. Khizouie 
