170 ORCHIDACEM 



acute, prominently 3-nerved, 18-30 cm. long, 3.2-5.5 cm. wide. 

 Petiole nervose, about 1 dm. long. Sccqie lateral from the base 

 of the pseudobulb, about 8 dm. long, inflated below, bracteate. 

 Bracts closely appressed, acute, 4-6 cm. long, plurinervose. 

 Flowers yellow marked with purplish or reddish lines, in a loose, 

 elongated raceme. Bracts scarious, linear, acute, 5-8 mm. long, 

 shorter than the pedicels. Pedicel and ovary together 1.5 cm. long, 

 slender. Lateral sej^als oblong, falcate, acuminate, acute, apex 

 recurved, 1 cm. long, 2-2.5 mm. wide. Upper sepcd linear-oblong, 

 acuminate, acute, 11-12 mm. long, 2 mm. wide. Petals oblong, 

 acuminate, acute, prolonged into a delicate tip, 3-nerved, 10-11 

 mm. long, 3 mm. wide. Labellum large, 5-6 mm. long, 13 mm. 

 wide with a spherical sac at base, 2-lobed ; lobes subquadrate, 

 margin uneven ; between the lobes at the apex of the lip a strongly 

 deflexed triangular mucro; at base of lip 2 erect, obtuse, thin 

 calli, and 3 thickened, raised, wavy nerves which extend beyond 

 the middle of the lip. Column without a distinct foot. 



Sax River, Pro v. Zamboanga, Mindanao, February 10, 1905, 

 R. S. Williams (no. 2140, in hb. N. Y. Bot. Gard.). — Terrestrial, 

 river precipice, Camp Keithley, Lake Lanao, September-October, 

 1906, Mary Strong Clemens (no. 701). 



South India, Ceylon, Sumatra, Moluccas, Java. 



DENDROBIUM Sw. 



D. (§ Sarcopodium) ACUMINATUM Rolfe ex Ames Orchi- 

 dace,e fasc. 1, 86 (1905) ; supra, t. 17. 



PseudobuTbs diphyllous, ovoid, approximate, serially arranged 

 along the stout woody rhizome, as many as five or six in a row, lean- 

 ing obliquely forward, distinctly quadrangular, concave between 

 the angles, often wrinkled or furrowed horizontally, surface smooth 

 or shining, yellow or orange-yellow, along the obtuse angles suf- 

 fused with green, the younger pseudobulbs clothed with yellowish, 



