Hoya amoena Bakhuizen 1950
Type description:
In Blumea 6/2 (1950) 380. “Notes on the Flora of Java” R. C. v. d. Brink Jr.. Hoya amoena Bak. f. spec. nov.. Hoya purpureo-fusca apud Koorders, Exk. Fl. Java 3 (1912) 102 non Hook.
Scandens; caulis primo sparse pilosellus dein glabra vel subglabra; folio oblonga- lanceolata, nonnunquam subrhomboidea vel ovata basi acuta vel cuneata, raro obtusiuscula, acuta vel breviter acute acuminata, in sicco tenuiter sed valide coriacea subtrinervia vel uninervia, nervis lateralibus atque nervulis transversis superioribus vix a nervis basilibus diversis, glabra 8 - 11 cm. longa, 3.5 - 4.5 cm. lata, petiolo gracili glabro 8 - 15 mm. longo. Inflorescentia umbelliformis quam maxime 20 flora pedunculo gracili pilosello 2.5 - 5.5 cm. longo sustenta; pedicellus tenuis subglaber 15 - 18 mm. longus; corolla horizontaliter patens 1 cm. diametiens; calycis laciniae ovato-triangulares obtusicule subglabrae 1 mm. longae; corollae laciniae acutissimae, extus glabrae intus purpureae; coronae lobi ovati-triangulares, intima et extrema parte acutiusculi, supra leviter carinata; pollinia oblongo-obovata uno latere pellucide-marginata 0.6 mm. longa, translatore plus quam duplo longiora; folliculi lineares obtusi sparse pilosi 18 cm. longi. Java, Eastern part, Besoeki, Poeger, alt. 10 m: Koorders 20341 b (L), type spec., fl. Oct.; idem 20704 b (L) Oct.; idem. alt. 5 m: idem 203440 b (L) fl. Oct.
Translation: Hoya amoena R. C. Bakhuizen van den Brink species new Hoya purpureo-fusca in the writings of Koorders, Exkersionsflora, Flora von Java 3 (1912) 102, not Hooker. Climbing; stalk at first sparsely with hairs thereafter glabrous or somewhat glabrous; leaves oblong-lanceolate, sometimes almost rhomboid or ovate with the base acute or wedge-shaped, rarely obtuse, acute or briefly acute acuminate, when dried thin but strongly leathery somewhat uninerved or distinctly trinerved at the base, lateral nerves and transverse nerves above fixed at the base which are barely different, glabrous 8 - 11 cm. long, 3.5 - 4.4 cm. wide, petiole thin, glabrous 8 - 15 mm. long. Inflorescence umbel-like of more than 20 flowers supporting narrow hairy peduncle 2.5 - 5.5 cm. long; pedicels thin almost glabrous 15 - 18 mm. long; corolla spreading horizontally 1 cm. in diameter; calyx leaflets obovate triangular very obtuse almost glabrous 1 mm. long; corolla lobes very acute, outside glabrous inside purple; lobes of the corona ovate-triangular inner and outer parts slightly acute, above lightly keeled; pollinia oblong-ovate one side with a pellucid margine 0.6 mm. long, more or less twice longer than the translators; follicles linear obtuse sparsely pilose 18 cm. long.
Other literature
In Flora of Java 2 (1965) 2709. Backer (key)
b. corona-scales inserted at the base of the staminal tube, not with a constriction between the inner and the outer angles, oval-triangular, rather acute at both ends, slightly carinate above; peduncle thin, pubescent, 2.5 - 3.5 cm. long; pedicels thin, pubescent, 15 - 18 mm. long; calyx segments ovate-triangular, rather obtuse, subglabrous; corolla violet-brown, in succo c. 1 cm. diam.; segments very acute, glabrous outside, pubescent inside; pollinia oblong-ovate, with a suboblique, truncate-rounded top, pellucid-margined, c. 0.06 mm. long, well over twice the length of the translator; follicles linear, obtuse, thinly hairy, c. 18 cm. long. Young stems rather densely pubescent, old ones glabrous, or sparingly hairy only near the nodes; leaves oblong-lanceolate, sometimes subrhomboid or ovate, from an acuta, rather obtuse base, in succo rather thinly but firmly coriaceous, glabrous, 8 - 11 cm. by 3.5 - 4.5 cm, 1-nerved or distinctly 3-nerved at the base; basal nerves in direction and thickness not, or not conspicuously, differing from the higher lateral nerves; petiole thin, glabrous, 0.8 - 1.5 cm. long. Dimensions ?; C.?E.; below 500; forest; rare (H. purpureo-fusca Acct. non Hook.).….......……………………………H. amoena Bakh. f.