Sunday, July 30, 2017

[Botany • 2017] Zingiber alba • A New Species and A New Record, Scaphoclamys perakensis, of Zingiberaceae from Sumatra, Indonesia


 Zingiber alba Nurainas


ABSTRACT

 Zingiber alba is a new species from West Sumatra. Scaphoclamys perakensis is newly recorded species from the Eastern part of Sumatra. Detailed descriptions and photographs are given for each species. 

KEY WORDS: Scaphoclamys perakensis, Zingiberaceae, Zingiber alba, Sumatra.



Fig. 1.  Zingiber alba Nurainas.
  A: The plant habit. B: Part of the pseudostem showing the lower part of leaves and ligules. C: Inflorescence. D: Fruits. E: Seeds. F: Top part of inflorescence. G: A flower. H: Dissection of flower (from left): bract, calyx, corolla lobes, floral tube with stamen attach, ovary with epigenous gland style and stigma. I: detail of stamen and ovary with epigenous gland.
Scale bar: D = 2 cm; E = 1 cm; H = 2 cm; I = 2 cm. Photographed by Nurainas.

Zingiber alba Nurainas, sp. nov 

Type: INDONESIA, Sumatra, Simanau, Solok, West Sumatra, altitude 1200 m, 21 June 2016, Nurainas 3272 (holotype ANDA, isotype BO, TAI).

 Zingiber alba differs from Zingiber acuminatum var. acutibractetatum Valeton in its apex of ligules rounded, elongated of spike, arrangement of bract at top of spike is rose-like, bract bright white, ovate with subapicalmucronate, bracteole small, white and yellow flower


Distribution: throughout West Sumatra province and Batang Gadis National Park, North Sumatra. 

Ecology: Zingiber alba grows on sandy soils along the margins of mixed evergreen forests, edges of small rivers at 500-1200 meter elevation. Etymology: the epithet specific refers to color of bract. 

Phenology: Zingiber alba was observed in flower when it was collected in February 2006 and May 2016 and fruit when it was collected in October 2014. 

Vernacular name: Penggalan (Minangkabau language).



Scaphoclamys perakensis Holtt., 
Scaphochlamys perakensis Holttum, Gard. Bull. Singapore. 13 (1950) 97., nom. nov. 
....

Distribution: Perak and Sumatra (Riau). 
Ecology: Scapholamys perakensis grows on the forest floor at limestone area.


Nurainas Nurainas and Dayar Arbain. 2017. A New Species and A New Record of Zingiberaceae from Sumatra, Indonesia. 
  Taiwania. 62(3); 294-298.   DOI:   10.6165/tai.2017.62.294

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