Ames — Additions to the Orchid Flora of Panama. 153 



latum, longe acuminatum, apice dorso carinatum, trinervium, basi colum- 

 nae tantum connatum, circa 1.3 cm. longum, prope basim 2 mm. latum. 

 Petala minuta, oblonga, superne paulo dilatata, obtusa, membranacea, 

 uninervia, circa 2.65 mm. longa et 1.2 mm. lata ultra medium. Labellum 

 circuitu ovatum, abrupte trilobatum, circa 4.9 mm. longum et 2.9 mm. 

 latum trans lobos laterales; unguis quadratus; lobi laterales falcato- 

 lineares, antrorsum semilunati et incurvi, obtusi, prope basim papillosi, 

 circa 2 mm. longi; lobus intermedins porrectus, oblongus, parte anteriore 

 oblique rotundatus, acutus, margine irregulari, parte inferiore carinis 

 crassis binis paulo convergentibus ornata, circa 3 mm. longus; unguis et 

 lobi terminalis pars inferior incrassati. Gynostemium circa 4 mm. 

 longum, superne late alatum, ala leviter bilobata in partes semiorbiculares 

 denticulatas, pede crasso brevi ornatum. Pollinia duo, complanato- 

 pyriformia. 



This species is very similar to Pleurothallis bifalds Schltr., but it is a more 

 dwarf plant with shorter leaves, almost thrice shorter petals and twice 

 shorter labellum and column. It differs from P. Wercklei Schltr. in having 

 far longer sepals, shorter petals and longer labellum. The distinctive 

 characters are the rounded apex of the leaves, the large flower with long 

 sepals and diminutive petals and the unusual linear-falcate lateral lobes of 

 the labellum. 



PANAMA, Province of Chiriqui, Valley of the Rio Quebrada, KilUp 

 3540. February 8, 1918. 1,700 meters altitude. On trees in deep woods. 



Scaphosepalum longirepens, sp. nov. 



Herba gracilis, epiphytica. Rhizoma longe repens, teres, multiarticu- 

 latum, vaginis tubularibus scariosis numerosis pro parte ob tectum, 

 usque ad 17 cm. longum. Radices longae, glabrae, flexuosae, circa 1 mm. 

 crassae, ut videtur simplices. Caulis perbrevis, circa 3 mm. longus. 

 Folia lineari-oblanceolata, plus minusve 6 cm. longa et 8.5 mm. lata super 

 medium (raro multo minora), apice acuta, basi in petiolum gracilem 

 canaliculatum inferne uniarticulatum sensim angustata, subcoriacea, 

 nervo medio supra sulcato, subtus alte carinato. Pedunculus e caulis 

 summo exoriens, cum caule et petioli basi vagina scariosa inclusus, arcuatus 

 vel leviter flexuosus, gracillimus, teres, vaginis parvis inconspicuis tubulari- 

 bus compluribus obtectus, usque ad racemum 4-6.6 cm. altus. Racemus 

 fractiflexus, plus minusve 6 cm. altus, multiflorus, floribus approximatis 

 distichis. Bracteae inflorescentiae minutae, erectae, scariosae, infundi- 

 buliformes. Flores in genere inter minores. Sepala basi cohaerentia et 

 cupulam formantia. Sepala lateralia usque per duas tertias connata, 

 dorso alte et crasse bicarinata, carinis in caudas binas divaricatas extensis, 

 per omnia circa 6 mm. longa. Sepalum dorsale inferne cum sepalis later- 

 alibus connatum, lingulatum, apice rotundatum et obtuse acutum, dorso 

 medio alte carinatum, parte superiore valde incrassata, circa 4.9 mm. 

 longum. Petala minora, oblique elliptico-ovata, acuta, apice dorso crasse 

 carinata, circa 3 mm. longa. Labellum quam petala paulo brevius, circa 

 2.6 mm. longum, ex ungue quadrato .65 mm. longo in laminam leviter sed 

 distincte trilobatam subito dilatatum; lobi laterales semiorbiculares; 



