XII, C, 5 Smith: Amboina Orchidaceae 259 
THRIXSPERMUM Loureiro 
THRIXSPERMUM AMPLEXICAULE Reichb. f, Xen. Orch. 2: 121. 
AMBOINA, Koesoekoesoe sereh and Batoe merah, Reliquiae Robinsonianae 
1635, August 23 and 24, 1918, terrestrial, altitude 80 meters; flowers white, 
with a very pale tinge of violet, at first erect, then spreading, the column 
with a yellow ring on the inside and a yellow spot below it. 
SACCOLABIUM Blume 
SACCOLABIUM RUMPHIIi J. J. Sm. in Bull. Jard, Bot. Buit. 13 (1914) 44. 
AMBOINA, Roemah tiga, Reliquiae Robinsonianae 1634, July 20, 1918. 
Epiphytic, usually on Calophyllum inophyllum at sea level. Flowers yellow 
at the base, white toward the apex. 
PHALAENOPSIS Blume 
PHALAENOPSIS AMABILIS (Linn.) Blume Bijdr. (1825) 295; Tabel f. 44. 
Angraecum album majus Rumph. Herb. Amb. 6: 99, t. 48. 
AMBOINA, Amahoesoe, Robinson Pl. Rumph. Amb. 8, August 380, 1913, 
epiphytic, altitude 4 to 8 meters. Flowers white, callosities on the lip 
with yellow margins and lilac dots. 
PHALAENOPSIS ROBINSONII sp. nov. 
Caulis brevis, c. 5-folius, radicibus numerosis. Folia anguste 
oblique oblonga, obtusa, basin versus sensim angustata, ima basi 
conduplicata, costa media dorso (sicco), leviter prominente, sicco 
ad c. 31 cm longa, 5.7 cm lata; vaginae basi tubulosae, ceterum 
conduplicatae, c. 1.5-2 cm longae. Inflorescentiae foliis brevio- 
res, ramosae, pedunculo usque ad rachidem terminalem c. 19.5 
cm longo, vaginulis paucis parvis patentibus carinatis donato, 
rachide diu flores gignente, fractiflexa, c. 3.75 cm vel plus longa, 
-internodiis 0.25-1 em longis. Bracteae alternatim bifariae, 
patentes vel patentissimae, conduplicatae, curvatae, concavae, 
acutae, carinatae, sicco 0.45-0.5 cm longae. Flores intervallis 
circa terni aperti, mediocres. Sepalum dorsale oblongum, apice 
marginibus incurvis contiguisque contractum, obtusum, conca- 
vum, 7-nervium, carnosum, c. 1.5 cm longum, 0.6 cm latum. 
Sepala lateralia oblique lanceolata, apice incurvo acuminata, 
acuta et dorso carinata, concava, 7-nervia, carnosa, c. 1.7 cm 
longa, 0.55 cm lata. Petala oblique elliptica, obtusa, acute et 
crasse conico-apiculata, basi satis angusta, concava, 6-nervia, 
c. 1.4 em longa, 0.65 em lata. Labellum porrectum, glabrum 
basi lamella brevi longitudinali horizontali adpressa antice bi- 
dentata dorso obtusangula donatum, appendice longitudinali ad- © 
nata angusta carnosa lateraliter compressa supra canalicula 
crenulato-bicostata antice libera horizontali bisubulata usque ad 
c. 0.6 cm supra basin pertinente ante lamellam basilarem, expla- 
natum c. 1.25 em longum, ad lobos laterales 0.6 cm latum; lobi 
