ADDITIONS TO THE ORCHID FLORA OF 

 THE MOUNTAIN PROVINCE, LUZON 



In late September and early October of 1921, M. Ramos and 

 G. Edano continued explorations in northern Luzon for the 

 Bureau of Science. Among the orchids obtained, those species 

 that appear to be new are described below. One new species from 

 the expedition of March 1920 is also included. 



ACORIDIUM Nees <% Meyen. 



Acoridium linearifolium Amessp. nov. AfF. A.graminifolio 

 Ames. Radices valde incrassatae, plus minusve 3 mm. in crassi- 

 tudine, in sicco longitudinaliter plurisulcatae. Pseudobulbi caes- 

 pitosi, dense aggregati, usque ad 3.3 cm. longi, attenuati; juni- 

 ores vaginis arete appressis, tubulatis, in sicco rubidis, plus mi- 

 nusve 2.5 cm. longis vestiti; vetustiores nudi, longitudinaUter 

 sulcati, erecti, in sicco 2 mm. in crassitudine, monophylli. Folia 

 linearia, graminea, plus minusve 30 cm. longa, circa 3 mm. lata, 

 subtus prominenter trinervia,basi valde attenuata, sensim in peti- 

 olum semiteretem contracta. Pedunculus folium excedens, cum 

 racemo plus minusve 25 cm. longus, pergracilis, pro parte folio 

 adnatus, usque ad basim racemi nudus. Racemus usque ad 8 cm. 

 longus, distichiflorus, 1 cm. in diametro, floribus 3 mm. inter se 

 distantibus. Bracteae inflorescentiae 3 mm. longae, glumaceae, 

 late triangulari-ovatae, acutae. Pedicellus cum ovario 1.5 mm. 

 longus. Sepala lateralia usque ad 6 mm. longa, 1.75-2 mm. lata 

 prope basim, triangulari-lanceolata, acuminata, acuta, triner- 

 via, apice trigono-incrassata. Sepalum dorsale usque ad 5 mm. 

 longum, plus minusve 1 mm. latum, oblongo-lanceolatum, acu- 

 minatum, acutum, trinervium. Petala usque ad 4.75 mm. longa, 

 plus minusve 1.5 mm. lata trans medium, oblongo-lanceolata, 



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