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XII, ©, 5 Smith: Amboina Opeleidciéane 251 
inferne folium erecto-patens foliis radicalibus simile sed vagina 
c. 1.5 cm longa instructum ceterum vaginulas c. 6-7 foliaceas 
patentes ovato-lanceolatas acute acuminatas marginibus et 
costa media decurrentes superne decrescentes et in bracteas 
vergentes gerente, rachide elongata, sicco angulata, glabra. 
Bracteae ovatae, sensim longius acuminatae, acutiusculae, con- 
cavae, basi 1-, supra basin 5-nerviae, ad c. 1.3 cm longae, 0.43 
cm latae. Flores c. 9-14, toti c. 1.25 cm longi. Sepalum dor-- 
sale erectum, ovatum, apice conduplicatum, obtusum, concavum, 
3-nervium, costa media dorso prominente, nervis exterioribus 
brevibus tenuibusque, c: 0.46 cm longum, 0.325 cm latum. Se- 
‘pala lateralia patentissima, superne oblique recurva, oblique 
lineari-oblonga, basi subfalcatula, obtusa, margine apicali in- 
curva, convexa, nervo intermedia dorso prominente, c. 0.55 cm — 
longa, 0.15 cm lata. Petala erecta, semiovato-oblonga, supra 
basin acuminato-angustata, obtusa, basi lata concavula, 2-nervia, 
nervo antico inconspicuo, bene 0.5 cm longa, basi 0.225 cm lata. 
Labellum defiexum, simplex, ligulatum, apicem versus sensim 
leviter angustatum, obtusum, 5-nervium, c. 0.65 cm longum, 
basi 0.15 cm latum; calcar dependens, inferne ovario adpressum, 
incurvum, laminam superans, teres, obtusum, c. 0.775 cm lon- 
gum. Gynostemium c, 0.225 cm longum, auriculis parvis verru-: 
culosis. Anthera brevis, latissima, apice late excisa, thecis 
valde remotis, parvis, clavatis. Ovarium .6-sulcatum, c. 1.3 cm 
longum. 
AMBOINA, Mount Salahoetoe, Reliquiae Robinsonianae 1639, November 27,. 
1913. Terrestrial, altitude 850 meters; flowers greenish. ; 
The plant seems to be closely allied to Platanthera halconensis (Ames) 
Schitr., from which it differs in its smaller flowers; blunt lateral sepals; 
and differently shaped petals. The basal leaves of P. halconensis are still 
unknown. 
PERISTYLUS Blume 
PERISTYLUS CANDIDUs J. J. Sm. FI. Buit. 6 (1905) Orch. 36. 
AMBOINA, Soja road, Reliquiae Robinsonianae 1625, August 1, 1913. 
Terrestrial, altitude 200 to 300 meters; flowers white; basal leaves usually 
four. 
HABENARIA Willdenow 
HABENARIA RUMPHII Lindl. Gen. et Sp. Orch. (1835) 320. 
Orchis amboinica minor Rumph. Herb. Amb. 6: 118, t. 54, f. 2. 
Flos susannae minor Rumph. op. cit. 5: 287. 
AmpBoina, Soja road, Robinson Pl. Rumph. Amb. 11, August 1, 1913. 
Terrestrial, on grassy hillsides, altitude 100 to 300 meters. 
HABENARIA AMBOINENSIS sp. nov. 
Caulis erectus, c. 40 cm longus, inferne vaginis tubulosis tec- 
tus, superne foliatus. Folia c. 10, basin caulis versus in vaginas 
