Monday, October 5, 2020

[Botany • 2019] Diplycosia papuana (Ericaceae: Vaccinioideae: Gaultherieae) • A New Endemic Species from central New Guinea


Diplycosia papuana Mustaqim, Utteridge & Heatubun

in Mustaqim, Utteridge & Heatubun, 2019. 

Summary
Diplycosia papuana (Ericaceae: Vaccinioideae: Gaultherieae), a new endemic species from central New Guinea, is described and illustrated here. Notes on the distribution, ecology and conservation status of the new species, as well as a consideration of closely related species, are provided.

Key Words: Indonesia, Irian Jaya, Malesia, Papua, taxonomy
 

Diplycosia papuana.
 A twig; B flower; C stamen, front and side views; D ovary and style. Scalebar A 2 cm; B 2.2 mm; C 1.1 mm; D 1.5 mm.
Drawn by Wendy A. Mustaqim. 

Diplycosia papuana Mustaqim, Utteridge & Heatubun sp. nov. 

 RECOGNITION. Plant exclusively bristly, the twigs without a fine short indumentum of hairs. Similar to Diplycosia varians Sleumer in having 4 – 5-merous flowers, but differing in the exclusively circular leaves and in its smaller flowers (calyx tube c. 1 mm vs 4 − 7 mm long, corolla c. 3.5 mm vs 8 − 9 mm long, filaments c. 1.5 mm vs 5 mm long and anthers c. 1.4 mm vs 2.8 mm long in D. varians).

ETYMOLOGY. The epithet refers to the name of the type locality in Papua Province, the current geographical name of the Indonesian part of New Guinea.

DISTRIBUTION. Indonesia: Papua Province, Central Ranges (Valentijn Mts), Yahukimo Regency. Only known from the type locality.


Wendy A. Mustaqim, Timothy M. A. Utteridge and Charlie D. Heatubun. 2019. Diplycosia papuana (Ericaceae: Vaccinioideae: Gaultherieae): A New Endemic Species from central New Guinea. Kew Bulletin. 74, 68. DOI: 10.1007/s12225-019-9859-5