118 



This Dendrolium belongs to the small-flowered species of the section 

 Latouria. The shape of the labellum calls to mind that of I), dendrocolloides 

 J. J. S. and D. latifrons J. J. S., but the habit is very different. 



DENDROBIUM ( TRACHYRHIZUM) LATIFRONS J. J. S., sp. nov. 



Rhizoma breve, vaginis brevibus tubulosis sese amplectentibus omnino obtectum, 

 radicibus dense verrucosis. Caules simplices, elongati, supenie flexuosi, c. 47 cm. 

 longi, internodiis c. 3'7-l'3 cm. longis. Folia patentia, oblonga, oblique bidentata, 

 dentibus acutiusculis, costa media supra sulcata subtus prominente, marginibus in 

 sicco recurvis, sicco tenuiter coriacea, ad c. 5'5 cm. longa, 1*8 cm. lata, superiora 

 et inferiora decrescentia ; vaginae tubulosse, apice truncate, internodiis breviores. 

 InJlorescenticB in caulibus foliatis axillares, vaginam dorso ad basin perforantes, 

 arcuatae, laxe 3-5-florse, pedunculo cauli adpresso, c. 3-4 cm. longo, nonnullis 

 vaginulis tubulosis ad basin, rhachide c. l'5-2 cm. longa. JBractets adpressse, 

 triangulse, concavse, c. 0%3 cm. longae. Flores quaquaversi. Sepalum dorsale late 

 triangulum, marginibus curvatum et base utrinque angulatum, obtusum, concavum, 

 7-nervium, c. O8 cm. longum et latum. Sepala lateralia cum pede gynostemii 

 inentum obtusum formantia, antice omnino libera, late oblique triangula, obtusa, 

 breviter crasse obtusa apiculata, margine postico basi angulata, 7-nervia, costa 

 media dorso obtuse prominente, c. O95 cm. longa, basi 1'15 cm. lata. Petala 

 oblique subovalia, basi lata, breviter obtusiuscule triangulo-acuminata, concava, 

 minutissime erosulo-ciliolata, basi 3-nervia, c. 0'77 cm. longa, O53 cm. lata. 

 Labellum ungue brevi lato 5-nervio pedi gynostemii insertum, 3-lobum, curvatum, 

 subtus supra basin concavum cum nervis 5 obtuse prominentibus, intus fascia 

 latissima longitudinali carnoso-incrassata subquinquecostata cum costis 3 mediants 

 alte elevatis basi in appendicem reversam rotundato-trapeziformem obsolete retusam 

 concavam carnosam unguem sequantem, c. 0'2 cm. longam, O35 cm. latam, producta 

 in basi lobi intermedii in lamellam transversam porrectam excavationem anticam 

 obtegentem verrucosam antice dentes c. 5 porrectis iiTegulariter conicis gerentem 

 utrinque nonnullas costulas transversas emittentem terminante, intus papillosum, 

 explariatum c. 1'13 cm., usque ad apicem loborum lateralium O93 cm. longum, ad 

 lobos laterales c. 1'43 cm. latum, ungue c. O2 cm. longo ; lobi laterales erecti, 

 patentes, oblique ovati, rotundati, basi lati, concavi, margine postico manifesto 

 incurvi ; lobus intermedius latissimus, concavus, 2-lobus, medio plica supra concava 

 subtus convexa et in sinu dente brevi triangulo donatus, lobis transverse oblique 

 rotundato-quadrangulis, apice truncatis, irregulariter crenatis, angulum exteriorem 

 versus repandulis, expknatus c. 0'43 cm. longus, 1'3 cm. latus. Gynostemium 

 (foecundatum) bene 0'3 cm. longum, apice porrecto utrinque dente donato, auriculis 

 triangulis. Pes gynostemii cum ovario angulum obtusum fere rectum formans, 

 late oblongus, intus pubescens, basi dorso convexus, apice altius excavatus et dorso 

 roturidato-gibbosus, c. 0'7 cm. longus. Ovarium (foecundatum) obconicum, 6- 

 sulcatum, c. 0'4 cm. longum ; pedicellus c. 1*3 cm- longus. 



Hob. Arfak Mts., Angi lakes, terrestrial in marsh by ? lake, 7000'. 

 Dec. 5558. 



This species is nearly allied to D. appendiculoides J. J. S., from which it 

 differs, so far as the single specimens allow comparison, by its more robust 



