THE GENUS ERIA IN THE PHILIPPINE ISLANDS. 
225 
cm longae. Pedunculus circ. IS cm long us, bracteis paucis adpressis. 
Bracteae reflexae, lineari-lanceolatae, acutae, circ. 0.40 cm longae. Flores 
patentes, circ. 0.80 cm longi. Sepalum dorsale oblongum, obtusum, 
valde concavnm, 5nervium, circ. 0.45 cm longum, 0.25 cm latum, extus 
disperse pilosum. Sepala lateralia ad pedem gynostemii decurrentia, 
mentum magnum, latum, saccatum, obtusum formantia, late oblique 
ovato-2angularia, obtusa, 5 nervia, circ. 0.40 cm longa, 0.50 cm lata, 
extus disperse pilosa. Petala oblonga, obtusa, 3nervia, circ. 0.46 cm 
longa, 0.23 cm lata. Labellum erectum, concavo-eymbiforme, basi fere 
saccatum, apice breviter fere aequaliter 31obatum, intus costis 3 alaeform- 
ibus, media duplici apicem versus evanescenti, lateralibus ad basim lobi 
medii in lobulum brevem, obtusum, liberum terminantibus, expansum 
fere quadrangulum, circ. 0.47 cm longum, 0.425 cm latum; loti laterales 
anguli, obtusi, convexi, vix 1.10 cm longi; lobus rnedius paulo brevior, 
late 3angulus, obtusus, concavus, marginibus reflexis. Gynostemiurn 
breve. Stigma magnum, profundum, rotundum. Pes gynostemii cum 
ovario angulum acutum, fere rectum formans, rectum, circ. 0.30 cm 
longum. Ovarium pedicellatum circ. 0.60 cm longum.” Smith, l. c. 
Luzon, Province of Bataan, Mount Mariveles, Merrill 3737, January 1, 1904. 
Mindoro, Mount Halcon, Merrill 581/-7 , November 26, 1906, epiphytic in ravine 
forest, altitude 1,200 m. 
SYNOPSIS OF SPECIES. 
In a large genus the forming of distinct sections is often difficult. 
Yet with a local treatment, the number of species being limited and 
the confusing species absent, the matter is arranged much more readily. 
This is but saying that the rule for comprehensive treatises may be 
different from the rule for provincial floras. It is permitted to draw 
lines rather more sharply in the latter than in the former. And in fact 
it is necessary, if one is to be guided by practical rather than theoretical 
considerations, to draw them somewhat differently in the local case. 
With the definitions of sections in the present conspectus I have had 
regard to the Philippine species alone, feeling free to modify, for the 
convenience of the student of the Philippine flora in especial, the form 
given the groups by their authors. 
As to the arrangement of the sections, it is obvious that no linear 
arrangement will represent the natural affinities. Hymeneria (in a 
restricted sense) seems to me to be the most generalized, or central form, 
introduced perhaps by Urostachya — with which it merges — and giving off 
directly or indirectly Aeridostachya and Dendrolvrium. Mycarantlies, 
Cylindrolobus, and Trichotosia are evidently allied, but the exact con- 
nection with the rest of the genus is not clear. 
Measurements in the following descriptions are taken from dried specimens, 
and when single measurements are given they are the maxima rather than the 
averages. Lengths of leaves are taken from the disarticulation and do not include 
sheathing bases. Length of racemes are exclusive of the peduncle. The height 
