Smith : Orchidaceae novae Malayeiises X. 99 



This much resemble M. brevifollils J.J.S. but tlie lamina of the lip is 

 not dilated towards the tip with incurved margins. 



It is a curious fact tliat the species of Microsacciis ofteii grow together 

 with species of Adcnoncos. This has beeii stated as well in Java as in 

 Sumatra. M. dèmpoensis grew together with Adenoncos virens Bl ; the 

 plants were even collected under the same number. 



Description from very few plants preserved in alcohol. 



Microsaccus ampullaccus J. J. S. n. sp. 



Caulis dependens, ramosus, apicibus incurvus, viridis, dense foliatus, 

 ad c. 9 cm. longus, cum foliis ad c. 2.3 cm. latus, basi tantum radiées tenues 

 emittens. Folia subpatentissima, lateraliter compressa, oblique oblongo-triangu- 

 la, leviter acuminata, acuta, lateribus convexa, basi supra breviter fissa, 

 viridia, c 1.2 cm. longa, fere 0.4 cm. alta; vaginae tubulosae, lateraliter com- 

 pressae, apice obliquae, virides, internodia superantes. Inflorescentiae axilla- 

 res, brevissimae, biflorae, peduncuio abbreviato, nonnullis vagiiiulis latis teneris 

 pellucidis albis apice virescentibus in bracteas vergentibus donato. Bracteae 

 ovarium superantes, conduplicato-concavae, superne carinatae, acutae, colore 

 vaginularum, ad c. 0.34 cm. iongae. Flores parvi, carnosuli, nivei, c. 0.5 cm. 

 lati, 475 cm. longi. Sepalum dorsale erectum, ovarium continuum, lineari- 

 oblongum, apice vix dilatatum, obtusum, interdum minute apiculatum, 

 utrinque convexum, intus inconspicue sulcatum, c. 0.275 cm. longum, 0.075 cm. 

 latum. Sepala lateralia subpatentissima, plus minusve reflexa, basi vix torta, 

 oblique lineari-oblonga, obtusa, basi tenui paulo dilatata ad calcar decurrentia, 

 leviter concava, dorso incrassata et praesertim apicem versus subcarina'ta, 

 sectione transversa triangula, c. 0.25 cm. longa, basi 0.1 cm., medio 0.06 cm. 

 lata. Petala patentia, labello adpressa, oblique ovalia, obtusa, concava, dorso 

 convexa, cum costa média dorso superne convexo-incrassata, c. 0.24 cm. 

 longa, 0.13 cm. lata. Labellum a dorso compressum, subtus visum urceolatum, 

 subtus longitudinaliter sulcatum, omnino niveum, totum c. 0.37 cm. longum; 

 lamina dimidio inferiore gynostemio adnata, calcar continua, ambitu quadran- 

 gula, truncata, vix retusa, canaliculata cum sulco longitudinali et lateribus 

 convexis, carnosa, c. 0.15 cm. longa, 0.13 cm. lata; calcar valde dilatatum, 

 ambiti suborbiculare, sulco retusum, c. 0.225 cm. latum. Gynostemium cum 

 anthera labello vix brevius, a dorso compressum apice valde dilatatum, 

 dorso convexum, c. 0.15 cm. longum, apice fere 0.1 cm. latum, clinandrio 

 transverso, concavo, margine postico rotundato-truncato erosuloque. Anthera 

 cucullata, rotundato-triangula, apice incurvulo obtusa, connectivo gibboso- 

 incrassato, alba, c. 0.07 cm. lata. Pollinia 4, obovoideo-ovalia, dilute flava, 

 cum stipite cuneato anfice convexo albo et glandula lineari alba c. 0.08 cm. 

 longa Rostellum patentissimum, rectangule incurvum et parte superiore in 

 lacinias 2 subulatas partitum. Stigma transversum, latum. Ovarium album, 

 c. 0.3 cm. longum. 



