ORCHIDACE^ 



LoBONG Cave, Clemens 106^ November 1915. 5000 feet altitude. Flower 

 yellow. 



27. Bulbophyllum (§ Racemosae) sigmoideum A.^ S. sp. 

 nov. Herba mediocris. Rhizoma repens. Pseudobulbi minutis- 

 simi, crasso-cylindracei, monophylli. Folium oblongum, apice 

 rotundatum, ad petiolum sulcatum angustatum, crasse coria- 

 ceum. Scapus pseudobulbo approximatus, suberecto-arcuatus, 

 folium excedens, vaginis nonnullis infundibuliformibus foliaceis 

 instructus. Bracteae inflorescentiae lanceolatae, acuminatae. 

 Racemus tarde laxiflorus. Floras carnosi, in sicco pellucidi. Se- 

 pala lanceolato-attenuata, apicibus longis caudatis terminantia. 

 Petala perparva, oblongo-lanceolata, obtusa et minute apiculata. 

 Labellum in positu naturali sigmoideum, in medio abrupte de- 

 curvum, apice leviter resurgens, parte inferiore membranacea 

 lateribus erecto-conduplicatis, dimidio anteriore angustissime 

 elliptico carnosissimo acuto; carina tenuis subtus extendit. 

 Gynostemium perbreve, brachiis binis brevibus triangularibus et 

 pede unciformi tuberculato praeditum. 



Plant medium-sized. Rhizome creeping, woody, terete, 3-4 

 mm. thick, invested by scarious sheaths that become fibrous. 

 Roots numerous, fibrous, flexuous, about .7 mm. thick. Pseudo- 

 bulbs minute, about 1 mm. high, 3 mm. broad below, about 7-8 

 mm. distant, monophyllous, concealed by the fibrous remnants 

 of sheaths. Leaf 9-14.5 cm. long, 2.6-3.4 cm. wide, oblong, 

 rounded at the apex, cuneate-narrowed to the petiole, thick and 

 coriaceous, the mid-nerve more or less sulcate above and carinate 

 beneath. Petiole 2-4.7 cm. long, rather stout, sulcate. Scape 

 approximate to the pseudobulb, suberect or gently arcuate, sur- 

 passing the leaf, about 20 cm. long, provided with four or five 

 foliaceous spreading infundibuliform sheaths which are imbricat- 

 ing below and successively more remote above, upper portion 



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