Hoya clandestina Blume 1848
Type description:
In Index Kewensis: This species is listed as in Rumphia 4 (1849) 32. Here it is only mentioned by Blume as follows: (Under the H. macrophylla heading.) Nisi foliorum coronae stamineae structuram respicias, facile confunditur cum Specie adhuc inedita, H. (Physostemma) clandestina, quae ipsa quoque locis mountains in Java reperitur et similiter foliis nervosis est praedita.
Translation: except for the corona structure, easily confused with a species hear-to-for unpublished, H. (Physostemma) clandestina, which I found in each mountain locality in Java and possessed in like manner with similar foliage nerves.
Other literature:
In Museum Botanicum Lugduno-Batavum 1 (1849) 44. C. L. Blume. 107. Hoya (Physostemma) clandestina Bl. volubilis, glabra, foliis carnosis elliptico‑oblongis acuminatis basi rotundatis trinervis inter nervos obsolete venulosis; umbellis longiuscule pedunculatis multifloris; corollae intus sericeae laciniis ovatis acutis revolutis; coronae stamineae foliolis supra convexis angulo exteriore assargente obtusiusculo. Bl. in Rumphia IV - Aroy kilampahanSundeice. — Foliatura plane eadem quae H. macrophyllae a qua tamen conformatione coronae stamineae facile distinguitur. - sylvis montanis Javae.
Translation: Hoya (Physostemma) clandestina Blume Twining, glabrous, leaves fleshy elliptic-oblong acuminate with the base rounded, three nerved between the nerves obscure veined; Umbels with many flowered long peduncles’ the inside of the corolla silky lobes ovate acute revolute; leaflets of the staminal corona convex with the exterior angle when dry somewhat obtuse. Blume in Rumphia 4 - Aroy Kilampahan, Sunda. - Foliage distinctly the same as H. macrophylla nevertheless from which it is easily distinguished, lacking the conformation in the staminal corona. In the mountain forests of Java.
In Flora van Nederlandsch Indie Bataviae 1 (1856) 523. Miquel 23. Hoya clandestina Bl. Volubilis, folia e basi rotundata usque acuta ovato‑vel elliptico‑oblonga passim lanceolato‑oblonga acuminata, carnosa glabra, trinervia, 5-fere 8 poll. longa; umbellae longiuscule pedunculatae multiflorae; corolla intus sericeae laciniae ovatae acutae revolutae; coronae stamineae phylla extrorsum obtusiuscula supra convexa BlumeRumphia l. c. Mus. bot. l. c. p. 45. Foliis H. macrophyllae similis, corona staminea facile distinguenda.
Java, in de bergstreken. Aroi Ki lampahan sund.
Translation: Hoya clandestina Blume. Twining, leaves at base rounded continuously acute ovate or elliptic-oblong here and there lanceolate-oblong acuminate, fleshy glabrous. Trinerved, almost 5, 8 inches long; umbels many flowered with a long peduncle, inside of corolla silky lobes ovate acute revolute; leaflets of the staminal corona outside somewhat obtuse, above convex. Blume Rumphia as sited above in Mus. Bot. As sited on page 45. Leaves similar to Hoya macrophylla, easily distinguished by the staminal corona.
In Exkursionsflora (1912) 100-101. Koorders (Key).
10a. Blatter sämtlich 5 nervig ...................................................................................................................................................................12
10b. Blatter sämtlich oder teilweise 3 nervig, seltener einige Blätter (H. macrophylla) 3— 5 nervig ..................................................... 11
11 a. Blatter 3 nervig, ± 12½ — 20 cm lang, ei‑ oder elliptisch‑oblong, am Grunde abgerundet oder spitz, oben zugespitzt, fleischig, kahl. Pedunculi vielblütig, lang. Korolle innen seidenhaarig. Windender Strauch, im Blatt an H. macrophylla erinnernd, aber durch die oberseits konvexen und auszenseits stumpfen Coronazipfel verschieden. Miq. 1. c. 623. West‑Java: In Gebirgswaldern zerstreut. — Im Buitenzorger Herbar noch nicht von mir gefunden. ........................ H. clandestina BL*
Translation: of 11 a. Leaves 3 nerved plus or minus 12.5 - 20 centimeters long, indeed otherwise elliptic-oblong, otherwise pointed at the base, above, fleshy, glabrous. Peduncles with many blooms, long. Korolla inside silky. A bushy vine, in foliage as H. macrophylla, but distinguished through the convex top of the coronal scale and obtuse end.