107 
Erirocum nurays Rchb. f. in Bonplandia, v. (1857) 36; ete. 
Arfak Mts., Angi lakes, saprophytic amongst bracken, on bank by 9 lake, 
7000’. Fl. (white). Dec. 5949. 
Distrib. New Guinea (D.S.W., Giriwo River, Janowsky ; N.E.). Tropical 
Asia and Australia. 
PreRosTYLts PAPUANA Rolfe in Kew Bull. 1899, 112; J. J.8. in Nova 
Guinea, xii. (1915) 185, t. Ixi. 99. 
Var. ARFAKENSIS J. J. §., var. nov. 
Caulis c. 4cm. longus, c. 5-folius. Folia patentia, petiolata, ovata, acuta, basi 
rotundata, costa media dorso carinata, laxe reticulato-venosa, ¢. 0°95-2 em. longa, 
0'8-1-4 cm. lata; petiolus canaliculatus, cum vagina ec. 1:1-1:8 em. longus ; folium 
summum ellipticum et brevius petiolatum. Inflorescentia erecta, 1-flora, pedunculo 
c. 9 cm. longo, vaginulis 2 sessilibus erectis bractew similibus ¢. 1-1:1 em. longis 
donato. Bractea erecta, adpressa, foliacea, ovata, acutiuscula, c. 1°15 em. longa. 
Flos erectus. Sepalum dorsale erectum, incurvum, valde concavum, inferne 
longitudine c. 0:55 cm. gynostemio adnatum, ovatum, sensim longe acuminatum, 
acutum, mucronatum, carinatum, c. 9-1l-nervium, ¢. 2°85 cm. longum, 1:1 em. 
latum. Sepala lateralia lacinia angusta ad pedem gynostemii decurrentia, ultra — 
apicem pedis gynostemii longitudine c. 0°6 em. inter se connata, oblique oblonga, 
longe caudato-acuminata, concava, cauda canaliculata, c. 7—8-nervia, supra apicem 
~ pedis gynostemii c. 2 em. longa, parte lata 1:3 cm. longa, 0°47 em. lata. Petala 
lacinia angusta ad pedem gynostemii decurrentia, oblique lanceolata, acuta, sub- 
falcata, margine superiore in 2? partibus supra basin obtusangula et irregulariter 
marginata, inferne oblique cuneato-angustata, supra basin ce. 5-nervia, tota c. 2°3 em. 
longa, 0°67 cm. lata, parte pedi gynostemii adnata c. 0°35 cm. longa. Labellum 
pedi gynostemii insertum, erectum, apice recurvum, inexplanatum, gynostemio paulo 
brevius, subovato-lanceolatum, apicem versus sensim angustatum, anguste obtusum, 
basi obtusum, convexum, plica longitudinali supra costato-prominente subtus 
canaliculata instructum, papillosum, e. 5-nervium, appendice basilari cum labello 
angulum obtusum faciente lineari incurva apice in lacinias e. 3 crenulatas diver- 
gentes divisa c. 0°27 em. longa, explanatum e. (1:175 cm. longum, infra medium 
0-325 em. latum. Gynostemium erectum, elongatum, gracile, in bene } parte 
supra basin obtusangule incurvum, inferne sepalo dorsali adnatum, bene } parte 
superiore late alatum, alis parallelis e basi semicuneata abrupte oblique quadrangulo- 
dilatatis, postice in laciniam conspicuam reversam triangulam obtusam productis, 
margine antico incurvis ciliatisque, angulo antico in appendicem subulatam pro- 
ductis, eum appendicibus ¢. 0°625 cm. longis, apice gynostemii late semi-elliptico 
obtuso valde concavo, cum anthera c.1‘5cm. longum. <Anthera erecta, cucullata, 
quadrangula, selliformis, apice bilobula cum apiculo brevi obtuso, basi 4-lobula, 
c. 0-15 em. longa. Stigma ce. 4 partem medianam gynostemii occupans, longi- 
tudinale, c. 0-43 em. longum. Pes gynostemii cum gynostemio angulum acutum 
faciens, linearis, % partibus inferioribus sepalis lateralibus petalisque adnatus, 
ceterum liber, ce. 0°5 em. longus. Ovarium 6-angulatum, in angulis parcissime 
dentatum, ¢. 1:35 em. longum; pedicellus tenuior, ¢. 2°7 em. longus. 
K 
