ORCHIDACEtE 



Luzon, Benguet Province, Mount Pulog, Elmer D. Merrill 6Ji.76, May 

 1909; Mount Santo Tomas, George Boettcher^ May 1918. Flowers rose 

 colored. 



Dendrochilum (§ Platyclinis) niveum Amessp. nov. Radices 

 validae, glabrae. Pseudobulbi caespitosi, statu juvenili vaginis 

 tubulatis tecti. Vaginae usque ad 4 cm. longae, obtusae. Folium 

 ligulatum, circa 1 dm. longum, 2 cm. latum, utrinque attenua- 

 tum, in sicco nervosum, nervo medio subtus magis prominenti. 

 Pedunculus cum racemo 21 cm. longus, gracilis, infra inflores- 

 centiam bractea singula ornatus. Racemus gracilis, 12 cm. longus, 

 laxiflorus. Bracteae inflorescentiae glumaceae, ±3.5 mm. longae, 

 convolutae, ovaria pedicellata superantes. Pedicellus cum ovario 

 circa 3 mm. longus. Flores distichi, nivei, circa 3 mm. distantes. 

 Sepala lateralia 5-Q mm. longa, circa 1.5 mm. lata infra medium, 

 triangulari-lanceolata, acuminata, valde acuta, trinervia. Sepalum 

 dorsale 5-6 mm. longum, vix 2 mm. latum, anguste oblongo- 

 lanceolatum, acuminatum, acutum, trinervium. Petala 5 mm. 

 longa, circa 1 mm. lata, oblongo-lanceolata, minutissime denti- 

 culata, acuminata, valde acuta, trinervia. Labellum usque ad 

 3 mm. longum, trilobatum, callo parvo in nervo utroque paulo 

 infra medium; lobi laterales tertiam partem labelli aequantes, 

 rotundati, obtusi, minutissime denticulati; lobus medius sub- 

 orbicularis, 2 mm. longus, vix 2 mm. latus, subito acutus vel 

 obtusus. Columna circa 2 mm. longa; stelidia lateralia prope 

 medium columnae exserta,longe lineari-triangularia, acuta, alam 

 apicalem baud aequantia; ala terminalis variabilis, minutissime 

 lobulata vel retusa. 



The nearest affinity of Dendrochilum niveum appears to be 

 D. Jiliforme Lindl., which has smaller flowers in denser racemes 

 and a very different labellum. The type consists of a single plant 

 in which the pseudobulb is immature and still clothed by the 



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