[Botany • 2017] Phyllanthus kaweesakii • A New Species (Phyllanthaceae) from Thailand

Phyllanthus kaweesakii  Pornp., Chantar. & J.Parn.

 Pornpongrungrueng, Parnell, Hodkinson & Chantaranothai, 2017

มะยมผา || DOI: 10.1139/cjb-2016-0298 

ABSTRACT

Phyllanthus kaweesakii Pornp., Chantar. & J.Parn. sp. nov. is newly described from the limestone mountain ridges in the northeast of Thailand. Comparison of morphology, anatomy, pollen morphology, and DNA sequences of this species with the most similar existing species P. mirabilis Müll.Arg. was undertaken. The results indicated that the two taxa are different in morphology, especially habit, stem base, and inflorescence, but that their pollen morphology and anatomy are similar. The molecular phylogenetic analysis, based on sequences of the plastid matK and nuclear ribosomal ITS regions, supported separation of the two taxa. This new species is described and illustrated, and its conservation status is discussed.

Keywords: Euphorbiaceae, Phyllanthaceae, Phyllanthodendron, Phyllanthus

Fig. 1. Phyllanthus kaweesakii sp. nov. (A–D): (A) Habit. (C) Nonswollen stem base and orthotropic branches. (D) Deciduous plagiotropic branches with inflorescences of axillary bisexual and unisexual cymules.
Phyllanthus mirabilis: (E) swollen stem base. 

    

Phyllanthus kaweesakii Pornp., Chantar. & J.Parn. sp. nov.

ETYMOLOGY: The name of this species honours the Thai biologist, Kaweesak Keeratikiat, who first discovered the plants.

VERNACULAR: Ma Yom Pha, มะยมผา. 

DISTRIBUTION: Currently known only from the type location; North-eastern THAILAND. 

ECOLOGY: On open limestone ridges, ca. 440 m a.s.l. Flowering period June to September, fruiting period August to September. 

Pimwadee Pornpongrungrueng, John A.N. Parnell, Trevor R. Hodkinson and Pranom Chantaranothai. 2017.  Phyllanthus kaweesakii (Phyllanthaceae), A New Species from Thailand. Botany. 95(6): 567-577: DOI: 10.1139/cjb-2016-0298

มะยมหินชนิดใหม่ของโลก Phyllanthus kaweesakii Pornp., Chantar. & J.Parn. (Phyllanthaceae), a new species from Thailand ตั้งชื่อชนิดเป็นเกียรติให้แก่ผู้ค้นพบและเก็บตัวอย่าง นายกวีศักดิ์ กีรติเกียรติ ประกาศตีพิมพ์เป็นพืชชนิดใหม่ ปี 2017

ลักษณะ เป็นพืชอวบน้ำ Succulent มีโขดลำต้นอวบอ้วนสะสมอาหาร ทนแล้งได้มาก มีลักษณะแตกต่างกับมะยมหินชนิดดั้งเดิม Phyllanthus mirabilis Müll.Arg. คือ จะกิ่งก้านเล็กและแตกกิ่งก้านเยอะกว่ามาก ใบมีขนาดเล็ก ทรงกลมมน มีคู่ใบน้อย 6-10 คู่ใบ ใบมีแว็กซ์สีเขียวอมฟ้าเล็กน้อย ออกดอกช่อสั้น ติดเมล็ดปลายยอด 

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Photos by Disapol Rattasi

[Botany • 2016] Zingiber sirindhorniae | ไอยริศ • A Remarkable New Species in Zingiber section Dymczewiczia (Zingiberaceae) from Thailand

ไอยริศ |   Zingiber sirindhorniae Triboun & Keerat.

THNHMJournal.com 

ABSTRACT

 Zingiber sirindhorniae Triboun and Keerat., a new species from Thailand, is described and illustrated. It belongs to Zingiber section Dymczewiczia (Horan.) Benth. because of its terminal inflorescence which is rather rare in Zingiber.

KEY WORDS: new species, Zingiber, Dymczewiczia, Zingiberaceae, Thailand

Zingiber sirindhorniae Triboun and Keerat., sp. nov.

Diagnosis: Zingiber sirindhorniae belongs to Zingiber section Dymczewiczia (Horan.) Benth. due to the terminal infl orescence on the leafy shoot. It is most similar to Zingiber plicatum Škorničk. and Q.B. Nguyễ n in having terminal inflorescence and the limestone habitat, but they differ by the former having a short and small terminal inflorescence on a leafy stem and by the dark maroonish flowers.

Figure 2. Zingiber sirindhorniae Triboun and Keerat.:
A. habitat, B. habit, C. rhizomes, and D. inflorescence with opened flowers.

Photographed by Pramote Triboun. 

Distribution. Endemic to Thailand. So far known only from Loei Province. 

 Ecology. In humus among rocks in partially shaded dry evergreen forest on limestone hills, alt. 350-450 m. 

 Phenology. Flowering in June to August and fruiting in July to October. 

 Etymology. The specific epithet honours Her Royal Highness Princess Sirindhorn of Thailand who has taken a keen interest in the conservation of plants. Vernacular. Aiyarit (ไอยริศ), name given by Her Royal Highness Princess Sirindhorn.

  

Notes. Four Thai species of Zingiber produce a terminal inflorescence; the inflorescence is always terminal in Z. pellitum Gagnep. and Z. gramineum Blume, while Z. barbatum Wall. and Z. junceum Gagnep. occasionally produce a terminal inflorescence. These four species are taller (to 1 m tall or taller) and are terrestrial, while Z. sirindhorniae is rather slender and small (40-70 cm tall), and grows in humus in crevices on limestone cliffs. In habit Zingiber sirindhorniae is more like Z. plicatum Škorničk. and Q.B. Nguyễn. The inflorescence of the new species is rather fragile and delicate.

  

Pramote Triboun and Kaweesak Keeratikiet. 2016. Zingiber sirindhorniae, A Remarkable New Species in Zingiber section Dymczewiczia (Zingiberaceae) from Thailand.  The Thailand Natural History Museum Journal. 10(1); 1-6.  www.THNHMJournal.com

 ตราไปรษณียากร ชุด ปีใหม่ 2559 (ชุดที่ 1) ‘พืชตระกูลขิง’ 

Thailand • New Year 2016 Postage Stamps (1st Series) ‘Gingers (Zingiberaceae)’

[Botany • 2013] จันทร์หนู | Dracaena kaweesakii Wilkin & Suksathan • A New Species (Asparagaceae, subfamily Nolinoideae) from Thailand and Myanmar (Burma)

Abstract

A morphologically distinct element of the group of Dracaena species from Thailand and Burma with undifferentiated leaf sheaths, no leaf blade central costa, free tepals and free thickened filaments known as Chan nuu or Chan pha krai in Thai is shown to be a distinct species, Dracaena kaweesakii Wilkin & Suksathan based on habit, leaf base and margin, inflorescence axis indumentum and floral characters. It is described and illustrated. Ecological and conservation status assessment information are provided.

Keywords: Dracaena L. , dragon trees, Thailand, Burma, taxonomy, morphology, conservation

Etymology: This species is named for our collaborator, friend and co-author Toi (Keeratkiat Kaweesak) to recognise of his extensive knowledge of Chan diversity.

Distribution: Specimens seen from northern, northeastern and central Thailand, but ancedotal evidence exists as to extensive distribution in adjacent Burma (Fig. 4) through oral reports of the Burmese workers at Doi Ang Khang, which is on the Thailand/Burma border.

Vernacular names: Chan nuu (Saraburi, Lop Buri, Loei) Chan pa krai (Chiang Mai, Chiang Rai), Chan ku on (Shan, Chiang Rai and Burma)

Paul Wilkin, Piyakaset Suksathan, Kaweesak Keeratikiat, Peter van Welzen, Justyna Wiland-Szymanska. 2013. A new species from Thailand and Burma, Dracaena kaweesakii Wilkin & Suksathan (Asparagaceae subfamily Nolinoideae). PhytoKeys. 26 (2013) : 101-112.

doi: dx.doi.org/10.3897/phytokeys.26.5335

http://www.sci-news.com/biology/science-new-dragon-tree-species-burma-thailand-01472.html

[Botany • 2012] จันทร์แดง | Dracaena jayniana Wilkin, Suksathan & Keeratikiat • A New Endemic Species (Asparagaceae, tribe Nolinoideae) from central and northeastern Thailand

Summary

The taxonomic baseline for Dracaena in Thailand is reviewed, concentrating on a group of species for which morphology suggests a relationship with D. draco L., D. tamaranae Marrero Rodr., R. S. Almeida & Gonz.-Mart., D. ombet Heuglin ex Kotschy & Peyr., D. schizantha Baker, D. serrulata Baker, D. cinnabari Balf. f. and D. ellenbeckiana Engl. One morphologically distinct element of that group in Thailand known as Chan daeng in Thai is shown to be a distinct species, Dracaena jayniana Wilkin & Suksathan. It is described, illustrated and ecological information and a conservation assessment are provided.

Keywords: conservation, morphology, taxonomy

Wilkin P, Suksathan P, Keeratikiat K, van Welzen P, Wiland-Szymanska J. 2012. A New Endemic Species from central and northeastern Thailand, Dracaena jayniana Wilkin, Suksathan & Keeratikiat (Asparagaceae tribe Nolinoideae). Kew Bulletin. 67: 697-705.
doi: dx.doi.org/10.1007/s12225-012-9412-2

https://www.researchgate.net/publication/237844723_A_new_threatened_endemic_species_from_central_and_northeastern_Thailand_Dracaena_jayniana_%28Asparagaceae_tribe_Nolinoideae%29

http://www.kew.org/plants-fungi/Dracaena-jayniana.htm
http://web3.dnp.go.th/botany/PDF/publications/family_characters3.pdf