ORCHIDACEM 45 



133), t. 45, f. 2; Hooker f. Fl. Br. Ind. 6 : 118; J. J. Smith Orch. 

 Java 59. — Zosterostylis arachnites Blume Bijdr. 419, f. 32 

 (1825); Lindley Orch. PI. 446; Hooker Bot. Mag. t. 5381 (1863). 



"ZOSTEROSTYLIS. Perianthii sepala quinque lineari-subu- 

 lata, canaliculata, patentia ; interiora minora. Labellum magnum, 

 basiventricosum,gynostemium amplectens; limbusindivisus, patens. 

 Gynostemiwn breve, crassum, apice emarginatum, postice cavitate 

 antherifera amplissima ad marginem callosa instructum. Anthera 

 denti dorsali affixa, bilocularis. Massce pollinis dua3, bilobse, lon- 

 gitudinaliter dehiscentes, intus pulverese, ope glandulse communis 

 apici gynostemii affixse. Ob structuram singularem gynostemii 

 a Cranichide differre videtur. Herba terrestris. Radices fasci- 

 culatse. Folia radicalia, petiolata, basi vaginata, oblonga, nervosa 

 membranacea. Pedunculus radicalis, inferne vaginatus, tetra- 

 gonus. Flores spicati, bracteati, sessiles. Zosterostylis arach- 

 nites. Crescit : in sylvis opacis montium Salak et Seribu." — 

 Blume, I. c. 



Plant 19 cm. high, slender, glabrous. Roots fleshy. Bracts 

 ±2 cm. long, loosely sheathing, tubular, produced into a subulate 

 tip. Floral bracts broadly lanceolate, acuminate, acute, ± 12 mm. 

 long. Sejjals linear, 16 mm. long, acute, margin strongly revolute. 

 Petals similar to the sepals, 1 cm. long. Labellum shortly pubes- 

 cent at base, lanceolate, 1 cm. long, ± 5 mm. wide, saccate at 

 base, many-nerved, the middle nerves thickened. 



Mt. Pagbilao to Aijitimonan, Prov. Tayabas, Luzon ; a single 

 specimen on a mossy, rotten log in dense forest, flower dull 

 purple, lip with dark purple dots, odorless, March 9, 1905, E. D. 

 Merrill (no. 3999). 



The single specimen on which my determination is based has 

 been compared with the numerous forms in the Herbarium at 

 Kew. It appears to be a depauperate form of the species, agree- 

 ing with authentic material in floral conformation. The Merrill 

 plant has several very small leaves. Should there prove to be a 



