ORCHIDACE^ 



This extraordinary plant differs from Dendrobium ingratum 

 J. J. Sm. in being much shorter with generally longer leaves, nar- 

 row petals and considerably different lip. D. piestocaulon Schltr. 

 is vegetatively somewhat similar, but lacks the strongly zigzag 

 stem and peculiar flowers of this species. 



LoBONG, Clemens 118 (Type), November 1915. Flower purple and yel- 

 low; Clemens 222 A, November 1915. 



14. Dendrobium (§ Sarcopodium) tricallosum A. &^ S. sp. 

 nov. Herba parva, in visu longe repens. Rhizoma luteum, va- 

 ginis scariosis imbricantibus vestitum. Pseudobulbi subremoti, 

 ovoidei, diphylli. Folia lanceolata, obtusa, basi rotundata, coria- 

 cea, rigida. Inflorescentia inter folia bina oriens. Flores perpauci, 

 pro planta majores. Sepala lateralia oblonga, ad apicem subacu- 

 tum rotundata, mentum leviter saccatum formantia. Sepalum 

 dorsale late oblongum, apice rotundatum. Petala lanceolato-ob- 

 longa, apice rotundata. Labellum expansum obtriangulare, trilo- 

 batum; lobi laterales late rotundati; lobus medius triangularis, 

 obtusus, verrucosus ; carinae duae parallelae e basi fere ad lobos 

 laterales extendunt ibique in callos pyriformes cum callo simili 

 medio terminant. Gynostemium breve, crassum, prope basim 

 anguste alatum. 



Plant apparently long creeping. Rhizome ±2.5 mm. thick, 

 yellow, shining, more or less sulcate-angulate, divided by nodes 

 about 7 mm. apart, closely invested by scarious, cinnamon-col- 

 ored, imbricating sheaths that waste away in course of develop- 

 ment. Pseudobulbs ±8 mm. long, 5 mm. broad, about 3 cm. apart, 

 diphyllous, ovoid, yellow, shining, coarsely rugose, irregularly 

 four-angled, reclining on the rhizome. Leaves ±3 cm. long, 1 cm. 

 broad, lanceolate to ovate-lanceolate, obtuse, minutely and 

 obliquely bilobed, rounded at the complicate base, spreading, 

 rigid, thick and coriaceous, the mid-nerve prominently sulcate 



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