ORCHIDACE.E 



lector 13^8. Mount Sudan, Native Collector 2097, February-June 1914. 

 Flower pale yellow. Mount Santubong, Native Collector ■22^8, February- 

 June 1914. "Fl. red." 



22. ARUNDINA Bl 



Five species of this genus are now reported from Borneo, three 

 of which are recorded from JNIount Kinabalu. Except for the 

 one new species, none of the plants are endemic. 



1. Arundina Cantleyi Hook.f. Fl. Brit. Ind. 5 (1890) 858. 

 A very variable form with leaves ranging from 5-12 cm. in 



length, larger bracts than the type and oblanceolate petals. 



Mauei Parei Spur, Clemens 272, November 1915. Flowers white and 

 yellow; Clemens 266 A, November 1915. 



2. Arundina gracilis A. S^ S. sp. nov. Herba gracilis, alta. 

 Caulis erectus, vaginis coriaceis foliorum omnino obtectus. Folia 

 disticha, patentia, linearia, apice rotundata vel paulum bilobata, 

 basi plus minusve amplectentia, sensim acuminata, nervo medio 

 supra sulcato, subtus carinato. Inflorescentia terminalis, simplex, 

 brevis, nutans vel reflexa, foliis multo brevior. Rachis pauciflora. 

 Bracteae valde cymbiformi-conduplicatae, prope apicem con- 

 spicue alato-carinatae, ovaria aequantes et amplectentes. Se- 

 pala lateralia oblongo-lanceolata, complicato-mucronata,plus mi- 

 nusve falcata, carinata in parte superiore praesertim. Sepalum dor- 

 sale anguste ellipticum, acutum, sepalis lateralibus paulo longius 

 et latius. Petala linearia, circa in medio latiora, leviter falcata, 

 abrupte obtusa vel subacuta. Labellum in circuitu ovato-oblon- 

 gum, in medio trilobatum; lobi laterales parvi, triangulari-ob- 

 longi, rotundati ; lobus medius oblongo-subquadratus, late trun- 

 catus, apiculatus ; carinae tres, undulatae, e basi usque ad partem 

 anteriorem lobi medii extendunt, carinula brevis utrinque stat. 

 Gynostemium apodum, gracile, arcuatum, in parte superiore 

 alatum. 



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