ORCHIDACE.E 



bene breviores. Pedicellus cum ovario plus minusve 8 mm. lon- 

 gus, gracilis. Sepala lateralia triangula, 8 mm. longa, mentum 

 apertum 5.5 mm. longum formantia, acuminata, apice breviter 

 subulata. Sepalum dorsale 8 mm. longum, 2 mm. latum infra 

 medium, anguste lanceolatum, acuminatum, acutum, apice brev- 

 iter subulatum. Petala membranacea, 6 mm. longa, plus mi- 

 nusve 1 mm. lata supra medium, lanceolato-acuminata, e basi ob- 

 longa. Labellum vix trilobatum, prope medium in unguem 4.5 

 mm. longum contractum ; lamina libera 6 mm. longa, 6 mm. lata 

 trans basim, rotundato-triangula, subacuta, membranacea, mar- 

 gine irregulariter denticulato et crenulato ; lineae tres breviter 

 elevatulae per discum, in medio disci crista auctae. Gynoste- 

 mium perbreve, 1 mm. altum in pedem 5 mm. longum produc- 

 tum. Anthera subconica, postice retusa, basi utrinque in auricu- 

 1am producta, ant ice obtusa, apice bilobata, curvata. 



Among Philippine species most closely related ioDendrobium 

 ventricosum Kranzl. which has a very different labellum and 

 larger more erect leaves. In habit it bears some resemblance to 

 the Celebesian D. chrysotainium Schltr. which is a more robust 

 species and is very different in the structure of the labellum. 



The lower third of the stem is occupied by from six to thir- 

 teen obliquely spreading distichous leaves of about equal length. 

 Above the lower third of the stem the leaves become suddenly 

 reduced to form linear limbs about five in number that are 

 approximately 13 mm. long to the tip from the point of contact 

 with the stem and scarcely 2 mm. wide. The stem that bears 

 these reduced leaves is complanate and more or less sinuous, and 

 near its summit gives rise to clusters of bracts from among which 

 the flowers are produced in succession. In height the plants 

 examined range from eighteen to thirty-five centimeters. The 



anther is produced posteriorly, at the base, into a distinct auricle 



[97] 



