XII, C. 6 
Smith: Amboina Orchidaceae 
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 deflexum, 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 Robinsoyiianae 1639, November 27, 
1913. Terrestrial, altitude 850 meters; flowers greenish. 
The plant seems to be closely allied to Platanthera halconensis (Ames) 
Schltr., 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 CAN Dl DUS J. J. Sm. PI. 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. (1836) 320. 
Orchis amboinica minor Rumph. Herb. Amb. 6; 118, t. 5U, /. 2. 
Flos susannae minor Rumph. op. cit. 5: 287. 
Amboina, Soja road, Robinson PI. Rumph. Amb. 11, August 1, 1913, 
Terrestrial, on grassy hillsides, altitude 100 to 300 meters. 
HABENARIA AM BOI N ENSIS sp. nov. 
Caulis erectus, c. 40 cm longus, inferne vaginis tubulosis tec- 
tus, superne foliatus. Folia c. 10, basin caulis versus in vaginas 
