Saturday, March 25, 2017

[Botany • 2017] New Species; Peperomia sirindhorniana รักตะนิล, P. heptaphylla, P. masuthoniana & P. multisurcula and A Reinstatement in Peperomia (Piperaceae) from Thailand

รักตะนิล |  Peperomia sirindhorniana Suwanph. & Chantar.

Four new species of Peperomia (Piperaceae) from Thailand, namely Peperomia heptaphyllaPeperomia masuthonianaPeperomia multisurcula and Peperomia sirindhorniana are described and illustrated. The reinstatement of Peperomia dindygulensis is also proposed with supporting morphological evidence.

Key words: IUCN vulnerability; morphology; taxonomy

Taxonomic Treatment

• Peperomia heptaphylla Suwanph. & Hodk., sp. nov. 

Type: Thailand, Prachuap Kiri Khan
Etymology. The specific epithet refers to the number of leaves per node.
Vernacular Name: เบี้ยประจวบ - Bia Pra Chuap.

• Peperomia masuthoniana Suwanph. & Chantar. sp. nov. 

Type: Thailand, Chiang Mai, Doi Chiangdao
Etymology: The specific epithet honours Associate Prof. Sumon Masuthon (1952 – present), Department of Botany, Faculty of Science, Kasetsart University, who encouraged the first author to intensively study the family Piperaceae for the Flora of Thailand project.
Vernacular Name: เบี้ยเชียงดาว - Bia Chiang Dao.

• Peperomia multisurcula Suwanph. & Hodk. sp. nov. 
Type: Thailand, Nan
Etymology: The specific epithet refers to the stems that have many clumps, and many main stems and branchlets.
Vernacular Name: เบี้ยสะปัน - Bia Sa Pan (Nan).

• Peperomia sirindhorniana Suwanph. & Chantar., sp. nov. 
Type: Thailand, Loei, Nong Hin, Pha Hin Ngam

Conservation Status. This species is uncommon and only a few specimens have been collected from the border area between Loei and Khon Kaen provinces in northeastern Thailand. The populations are narrowly distributed in an area of karst limestone and not in a protected area. The populations are threatened by farming and deforestation. The status of Peperomia sirindhorniana is assessed as Critically Endangered (CR), according to IUCN (2011) criteria and the authors consider a category of B1b to be appropriate.

Etymology: The specific epithet honours to H.R.H. Princess Maha Chakri Sirindhorn Mahidol who initiated the Plant Genetic Conservation Project to develop the personnel and plant genetics resources for the maintenance of plant varieties, and for the development to be advantageous for farmers and the business sector of Thailand.
Vernacular Name: Rak-Ta-Nil.

 We discovered some unidentified specimens (T. Smitinand & H. Sleumer 1131 in BKF and L that were collected from Pha Nok Khao, Khon Kaen province, northeastern Thailand. They are similar to Peperomia pellucida in gross morphology but differ in some characters. We have subsequently collected living specimens from a nearby locality and they are easily recognised as a species new to science. The distinguishing characteristics of P. sirindhorniana are its red or reddish petioles and stems, and its bright to dark green leaves when fresh (subcoriaceous when dry) as opposed to pale green (membranous when dried) in P. pellucida. Furthermore, its fruits are larger than P. pellucida and are ovoid with a beaked apex formed from the style and it has densely acute papillae on the fruit surface.

• Peperomia dindygulensis Miq.

Etymology: The specific epithet refers to Dindygul (the city in the South Indian state of Tamil Nadu) from which the type specimens were collected.
Vernacular Name: ผักป้องแดง - Phak Pong Daeng (Chanthaburi).

Chalermpol Suwanphakdee, Trevor R. Hodkinson and Pranom Chantaranothai. 2017. New Species and A Reinstatement in Peperomia (Piperaceae) from Thailand.
  Kew Bulletin. 72(1);  DOI: 10.1007/s12225-016-9662-5

  รักตะนิล ซึ่งมีความหมายว่า เขียว-แดง เนื่องจากพืชชนิดนี้มีลำ ต้นและก้านใบสีแดง มีใบสีเขียวเข้มหรือสีมรกต