ORCHIDACE.E 



relative length of the labellum lobes, the lateral lobes equaling 



the terminal one in^. Unearifolium and exceeding it \nA.per~ 



plexum. Another difference is found in the more or less concave 



mid-lobe of the lip of A. perpleccum, which has an elongated 



apiculate tip. 



Lepanto Subprovince, Mount Sinapsapan, 31. Ramos Sf G. Edafio 65, 

 October 13, 1921. On tree in mossy forest. Flowers red. 6000 feet altitude. 



Acoridium pulcherrimum Ames sp. nov. Herba epiphytica. 



Rhizoma elongatum. Radices fibratae, plus minusve 4 cm. lon- 



gae, circa 1 mm. in crassitudine, ramosae. Pseudobulbi usque ad 



4 cm. longi, in sicco 5 mm. crassi, flavescentes vel virescentes, 



longitudinaliter sulcati, fusiformes, aggregati, contigui ; j uniores 



vaginis scariosis obtecti, monophylli. Folium cum petiolo usque 



ad 11 cm. longum, usque ad 1.5 cm. latum, in sicco subcoria- 



ceum, ligulatum, utrinque attenuatum, apice subacutum, mu- 



cronulatum, bene marginatum, nervo mediano prominenti, ner- 



vulis in sicco vix eminentibus. Scapus hysteranthus, lateralis ut 



videtur, vaginis scariosis arete appressis obtectus, cum racemo 



plus minusve 10 cm. longus, infra racemum bracteis imbrican- 



tibus vestitus. Racemus usque ad 7 cm. longus, distichiflorus, 



plus minusve 7 mm. latus trans basim, in sicco bene flavescens, 



quam folii brevior. Bracteae inflorescentiae plus minusve 3 mm. 



longae, circa 3 mm. latae, glumaceae, late ovatae, conspicue ner- 



vosae, margine apicali denticulatae. Pedicellus cum ovario vix 



1 mm. longus, oblique ascendens, quam bractea multo brevior. 



Sepala lateralia 4 mm. longa, 1.5 mm. lata trans medium, ob- 



longo-elliptica, uninervia, membranacea, apice obtusa, rotun- 



data. Sepalum dorsale vix 4 mm. longum, 1 mm. latum, oblon- 



gum, membranaceum, apice subacutum vel obtusum. Petala 



membranacea, 3 mm. longa, supra medium plus minusve 1 mm. 



lata, spathulata, margine fimbriata, apice obtusa vel acuta. La- 



[ 144 ] 



