54 
AMES. 
acteristic of the type to broadly lanceolate. As a rule the scapes exceed the 
leaves considerably and bear spikes of white flowers which appear to be more 
rigid than in the other material I have examined. The structure of the flowers 
is very similar in the plants from Mount Halcon and in those collected by Mc- 
Gregor, so that variation seems to be purely vegetative, P. prorepens is closely 
related to P. acuminata J. J. Smith, from which it appears to differ chiefly in 
the size of the floral parts. In Lindley’s herbarium at Kew there are two Javan 
species of Phreatia mounted on the same sheet. One of these, a plant collected 
by Junghuhn (no. 207), belongs to § Ebulbosae. The other, a plant collected by 
I.obb, belongs to § Bulbosae and is probably conspecific with P. acuminata. In 
habit it closely resembles P. prorepens and may be a form of that species. 
From my material it is quite impossible to distinguish P. acuminata from P. 
prorepens. In “Die Qrchideen von Java,” J. J. Smith distinguishes P. acuminata 
by the floral bracts being shorter than the ovaries. In my material I find some 
of the bracts conspicuously shorter than the ovaries, and some longer. 
Luzon, Benguet Subprovince, Pauai, Bur. Sci. 8363 R. G. McGregor, June, 1909. 
383. CLEISOSTOM A Bl. 
Cleisostoma Kunstleri Hook. f. Icon. PI. IV 4: pi. 2335. 
I refer , to this -species, which was originally collected at Perak by 
Kunstler, material from the Island of Polillo. Leaves coriaceous, oblong, 
at the apex unequally bilobed, 2 dm long, 3-4.4 cm wide. Scape terete,' 
2.5 mm in diameter. Bracts few, obtuse, 5 mm long. Inflorescence 
laxly paniculate, many-flowered. Floral tracts minute, acute, much 
shorter than the pedicels of the purplish flowers. Lateral sepals oblong, 
obtuse, 3.5 mm long, 1.25 mm wide. Upper sepal oblong or oblanceolate, 
obtuse, 5 mm long, 1.5 mm wide. Petals linear-oblong, ^obtuse, 4.5-5 
mm long, 1 mm wide. Labellum saccate, 3-lobed. Sac scrotiform, 3 mm 
long, with a posterior scale within, the scale oblong, membranaceous, bifid 
at the tip, each division obscurely emarginate. Lateral lobes minute, 
triangular, less than 1 mm long, middle lobe suborbicular, 1.5 mm long. 
Polillo, Bur. Sci. lO^lt R. C. McGregor, September 25, 1909, on tree 
trunks. 
286. BULBOPHYLLUM Thou. (§ Girrhopetalum) . 
Bulbophyllum chryseum comb. nov. 
Girrhopetalum chryseum Kranzl. in Fedde Rep. 8 : 97. 
This is a member of the section Girrhopetalum, characterized by a solitary 
flower at the summit of the- scape. The only other described species from the 
Philippines which are thus characterized are the ones very briefly described by 
Bindley, namely B. antenniferum and B. maccillare, which are remarkable on 
account of their very large flowers. 
I have not seen the type of B. chryseum but my material agrees almost in 
detail with Kranzlin’s description. Furthermore the collections in the Bureau 
of Science Herbarium contain no other species of the small, single flowered type 
which belongs to § Cirrfiopetalum that would indicate B. chryseum to be one of 
a group. Consequently I am morally sure that my identification is correct. 
The only other described species of § Girrhopetalum from the Philippines, char- 
acterized by a solitary flower, are the two mentioned above, and these are 
sharply distinguished by the extraordinary size of their flowers, these being among 
the largest in the section. 
