ORCHIDACE.E 



exceeding the leaves, ascending-arcuate, sparingly clothed with 

 sheaths. Sheaths up to 1.7 cm. long, those of the scape remote, 

 thin, tubular, acuminate; those below, at the base of the scape and 

 petiole, imbricating and scarious. Inflorescence up to 2 cm. long 

 (more or less immature in the material examined), loosely five- or 

 six-flowered. Bracts ^1 cm. long, lanceolate, very gradually acu- 

 minate, subulate at the tip, cucuUate at the base, tliree-nerved, 

 the upper margins involute. Perianth erect, slightly spreading. 

 Sepals 10.5-11 mm. long, 2.2 mm. wide near the base, the lateral 

 sepals slightly longer, linear, gently long acuminate to an ob- 

 scurely and unequally three-toothed apex, strongly involute, 

 three-nerved, the mid-vein keeled beneath. Petals much shorter, 

 about 5.7 mm. long, 1.1 mm. broad, linear, one-nerved, at the 

 apex more or less irregularly tridentate with the middle tooth a 

 little longer and sharper. Lip about 9 mm. long, 4.8 mm. broad 

 near the sessile base, ovate-lanceolate, long acuminate to an 

 obtuse apex, thicker in texture than the sepals and petals, the 

 margins ver}^ strongly involute en\\Tapping the column, slightly 

 undulate below, the upper surface closely and very finely papil- 

 lose, increasingly so above, on the under surface with five ap- 

 proximate, parallel ridges prominent at the base but soon dimin- 

 ishing. Column small, about 1.4 mm. long, extending forward, 

 concave above, convex beneath. Anther two-celled, suborbicular, 

 mucronate. Pollen grains powdery. 



This is a perfectly distinct plant from Chlorosa latifoUa Bl.,the 

 only other described species of the genus, which lacks the three- 

 toothed apex to the petals, and has much larger leaves and rela- 

 tively shorter scapes. (Plate 80.) 



Marei Parei Spue, Clemens 399, December 1915. Flower green. 



[ 10] 



