1580 Leaflets of Philippine Botany [Vol. V, Art. 77 



at my command, I am able to detect. A puzzling element in the 

 study of this subject is Reichenhach' s remark that Eria retrofiexa 

 Lindl. repeats E. ringens. Excepting E. ringens, Elmer's 10192 

 appears to be unlike all other Philippine species heretofore de- 

 scribed. 



Island of Negros: Province of Negros Oriental, Dumaguete 

 (Cuernos Mts.), May, 1909, A. D. E. Elmer, 10192. 



Eria tridens sp. nov. 



AfT. E. cymbiformi J. J. Sm. Caules abbreviati, 4.5 — 6 

 cm. longi. Folia elongata, linearia, circitei:3.6 dm. longa, circiter 

 1.8 cm. lata, petiolata, ad basim longe attenuata, ad apicem bilo- 

 bata, nerviis subtus 5 prominentibus, lobi acuti. Vaginae equi- 

 tantes, 2 — 4 cm. longae, conduplicatae. Pedunculi, foliis brevio- 

 res, circiter 1 dm. longi, densi-multiflori, lanuginosi. Racemi 

 usque ad 6.5 cm. longi, rhachidi pubescente. Bracteae inflores- 

 centiae, rigidae, cymbiformes, acutae, pubescentes plus minus 5 

 mm. longae, persistentes. Flores congesti color non in specimene 

 sicco apparens. Sepala lateralia ad pedem gynostemii decurrentia 

 mentum saccatum obtusum formantia, semiovata, obtusa cir- 

 citer 5 mm. longa, 6 mm. lata, extus disperse pilosa. Sepalum 

 dorsale oblongi-ellipticum, subacutum, circiter 5 mm. longum, 

 3 mm. latum, concavura, extus disperse pilosum. Petala oblongi- 

 lanceolata, obtusa, 3-nervia, usque ad 5 mm. longa, 2 mm. lata. 

 Labellum 5 mm. longum, erectum concavo-cymbiforme, basi 

 fere saccatum, apice breviter fere aequaliter 3-dentatum; dentes 

 acuti vel subacuti, 1 mm. longi. Calli 2, prope medium labelli. 

 Sacculus obtusus, 1.5 mm. longus. Gynostemium breve. 



E. tridens, as represented b}^ the material at hand, is a smaller 

 species than E. cymbiformis, recognizable by the calli of the 

 labellum which are situated well below the middle. In the speci- 

 mens examined I was unable to detect a middle callus or keel 

 near the base of the labellum. Eria ventricosa Leav. resembles 

 E. tridens in the form of the labellum and in the number and 

 position of the calli, but in detail the following differences are 

 observable; the apical lobing of the labellum is more tooth-like 

 in Eria tridens and the calh are truncate at the apex. 



Mindanao: District of Davao, Todaya (Mt. Apo), September, 

 1909. ,4. D. E. Elmer. 11850^ 



