Sunday, October 31, 2021

[Botany • 2021] Cymbilabia sourioudongii (Orchidaceae) • A New Species from Lao PDR

Cymbilabia sourioudongii Souvann. & Lanors.,

in Souvannakhoummane, Lanorsavanh, et al., 2021. 
ເອື້ອງຊໍ່ມ່ວງ  ||  
photos a–c by S. Lanorsavanh; d–e by P. Rakthai

Cymbilabia sourioudongii, a new species of epiphytic orchid is described and illustrated from Phou Khao Khouay National Protected Area of Laos PDR. 

Keywords: Illegal orchid trade, New species, Phou Khao Khouay National Protected Area, Vandopsis.

Cymbilabia sourioudongii Souvann. & Lanors.
a. Plant in habitat; b. Flowering plant; c. Flower in habitat; d. Flower of plant growing in nursery; e. Flower–lateral view;
f. Flowers of Cymbilabia undulata (Lindl.) D.K.Liu & M. H.L.
Scale bars 2 cm. 
(a–c from S. Lanorsavanh & Souvannakhoummane SL1982; d–f from cultivated plants; 
photos a–c by S. Lanorsavanh; d–e by P. Rakthai; f by W. Buddhawong).

Cymbilabia sourioudongii Souvann. & Lanors., sp. nov. 
 Similar to C. undulata but differs in having a more compact habit, narrowly elliptic-oblong to lanceolate leaves that are 2–3.7 cm long and 0.8–1.7 cm wide (vs. oblong, 9–15 cm long and 1.5–3 cm wide), smaller sepals and petals that are 7–18 mm long and 3–8 mm wide (vs. 24–40 mm long and 8–14 mm wide), a shorter labellum that is 5–9 mm long, which has semi-orbiculate side lobes (vs. 15–20 mm long with sub-ovate to triangular side lobes), a verrucose epichile (vs. muricate with papillae).

Habitat: Growing on small trees and boulders in full sun in mixed semi-deciduous broad-leaved and coniferous forest at around 1100 m elevation. 

Distribution: Cymbilabia sourioudongii is so far known only from the type locality in Phou Khao Khouay National Protected Area in Bolikhamxai province, central Laos.

 Etymology: The name for this species honors His Excellency Dr. Sourioudong Sundara, Vice Minister of Education and Sport, Lao PDR, who is an experienced scientific researcher of Lao PDR.

Vernacular name: Ueang Sor Mouang ເອື້ອງຊໍ່ມ່ວງ (Purple flower orchid).  

Souvannakhoummane K., Lanorsavanh S., Rakthai P., Kumar P. and S.W. Gale. 2021. Cymbilabia sourioudongii (Orchidaceae), A New Species from Lao PDR. RHEEDEA: Journal of the Indian Association for Angiosperm Taxonomy. 31(3); 186–190.


ທີມງານນັກຄົ້ນຄວ້າ ວິທະຍາສາດ ຈາກມະຫາວິທະຍາໄລແຫ່ງຊາດ ທີ່ໄດ້ຄົ້ນພົບ ດອກເຜີ້ງຊະນິດໃໝ່ຂອງໂລກ ຄົ້ນພົບຢູ່ເຂດປ່າສະຫງວນແຫ່ງຊາດ ພູເຂົາຄວາຍ ຢູ່ ສປປ ລາວ ໄດ້ໃຫ້ກຽດ ນໍາເອົາ ຊື່ຂອງທ່ານ ປອ. ສຸລິອຸດົງ ສຸນດາລາ (Dr. Sourioudong Sundara), ອາດີດ ອາຈານສອນ ແລະ ນັກຄົ້ນຄວ້າ  ທາງດ້ານ ວິທະຍາສາດ Biotechnology ຢູ່ມະຫາວິທະຍາໄລແຫ່ງຊາດ ຜູ້ນໍາພາທີມນັກສຶກສາ ຄົ້ນຄວ້າກ່ຽວກັບດອກເຜິ້ງປ່າ, ປະຈຸບັນ ເປັນ ຮອງລັດຖະມົນຕີກະຊວງສຶກສາທິການ ແລະ ກິລາ, ມາຕັ້ງເປັນຊື່ວິທະຍາສາດດອກເຜິ້ງຊະນິດໃໝ່ຂອງໂລກ ໃນຊື່ Cymbilabia sourioudongii Souvann. & Lanors.