Hoya formosana Yamazaki 1968
Type description:
In The Journal of Japanese Botany 43 (1968) 223. Takasi Yamazaki. 9. Hoya formosana (Chinese Script). Hoya formosana Yamazaki, sp. nov. Caulis scandens glaber 4 mm diameter. Folia carnosa late ovata 7-9 cm longa 4-5 cm lata apice abrupte attenuata basi rotundata in siccate pallida supra glabra basi ad costas sparse scabrida subtus glabra ad nervis scabrido-punctata, nervis primariis paucis 2-3 jugis conspicuis arcuatis, petiolis crassis 2-3cm longis fauce superiore surcatorum scabrido-punctatis ceteris glabris. Inflorescentia axillaris umbellata folio subaequilonga 5 cm diameter 25-40 florifera, pedunculis 3-3.5 cm longis glabris, pedicellis 2-2.5 cm longis fusco-pubescentibus. Bracteae lineari-oblongae 2-2.5 mm longae apice rotundatae margine puberulae. Calyx campanulatus 5 partitus late ovatis-obtusis extus sparse fusco-pilosis margine punctato-pilosis 2 mm longis 1.3 mm latis Corolla rotata 1.2 cm diameter utrinque glabra 5 fissa, petalis late petalis late ovatis, laciniis ovatis apice obtusis vel rotundatis margine sparsissime punctatis 5mm longis et latis. Corona stellate patens crassa 6 mm diameter, lobis ovalibus 2 mm longis 1.2 mm latis posterioribus obtusis anterioribus in dentem obtusem antherae incumbentem productis, appendicibus antherarum membranaceis rotundatis. pollinia erecta oblonga 0.3 mm longa, caudicibus brevissimis, retinaculo oblongo apice obtuso 0.15 mm longo. Pistillum conicum quinquangularis glabrum. Hab. Formosa. Hengchun (... ) (Yanagawa, typus in TI).
Translation: Stems climbing glabrous 4mm in diameter. Leaves fleshy broadly ovate 7-9cm long 4-5cm wide apex abruptly attenuate base rounded when dry flat very glabrous base near the midrib sparsely rough below glabrous with nerves roughly punctate, primary nerves few 2-3 pairs conspicuously curved, petioles thick 2-3cm long above the beginning of the young shoot roughly punctate otherwise glabrous. Inflorescences axillary umbels somewhat the same length as the leaves 5cm in diameter with 25-40 flowers, peduncles 3-3.5cm long glabrous, pedicels 2-2.5cm long brownish pubescence. bracts linear oblong 2-2.5mm long apex rounded margine puberulous. Calyx cup-shaped of 5 parte broadly ovate obtuse or rounded margines punctate-hairy 2mm long 1.3mm wide. Corolla rotate 1.2cm in diameter both surfaces glabrous of 5 parts, petals broadly ovate apex obtuse or rounded margines sparsely punctate 5mm long and wide. Corona star-like flat thick 6mm in diameter, lobes oval 2 mm long 1.2mm wide posterior obtuse anterior tooth-like obtuse anther incumbent, appendix of the anther membranaceous rounded. Pollinia erect oblong 0.3 mm long, caudicles short, retinaculum oblong with an obtuse apex 0.15mm long. Pistil conic of 5 angles glabrous. Habitat in Formosa.
Other literature:
In Flora of Taiwan (Vascular Plants) 6 (1973) 114. 122. Asclepiadaceae. H. carnosa (lf) R. Br. H. formosana Yamazaki in Jour. Jap. Bot. 43:223 (1968) Yang Lit. Pl. Taiwan 673.