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Monday, October 14th, 2024
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| 4:30a | [Botany • 2024] Microchirita radiata, M. simia, etc. • Four New Species of Microchirita (Gesneriaceae: Didymocarpoideae) from Thailand
Abstract Four new species of Microchirita (Gesneriaceae) from Thailand are described: Microchirita orothaiae, M. puglisiae, M. radiata and M. simia. With the addition of these species, 41 species are now recorded for Thailand. Keywords: endemic, karst limestone, Microchirita purpurea, M. tubulosa, taxonomy
Microchirita orathaiae Suddee, D.J.Middleton,Tetsana & Puudjaa, sp. nov. Similar to Microchirita purpurea D.J.Middleton & Triboun in general appearance but differs in the corolla tube pale yellow at the very base inside, dark bluish purple ventrally, somewhat dorsoventrally compressed making corolla mouth wider than high, lateral lobes strongly reflexed (dark purple throughoutor only slightly paler inside at base, not or only slightly dorsoventrally compressed with the corolla mouth mostly as wide as high, lateral lobes erect, not reflexed in M. purpurea) and anthers glabrous (anthers densely long pubescent near junction of upper anther locules and filaments in M. purpurea). Type: Thailand, Rayong, Khao Chamao District, ... Etymology.— The specific epithet is given in honour of the botanical artist Mrs Orathai Kerdkaew, a long-time staff member at BKF. Vernacular.— Yat o ra thai (หยาดอรทัย) (proposedhere).
Microchirita puglisiae D.J.Middleton, Daonurai, Poompayak & Suddee, sp. nov. Differs from all other Microchirita species in the combination of densely tomentose leaves, few-flowered inflorescences, white corolla lobes and narrow corolla tube flaring gradually towards the mouth. Type: Thailand, Saraburi, Phra Phutthabat District, ... Etymology.— The specific epithet is given in honour of Dr Carmen Puglisi (MO) for her contribu-tion to the taxonomy of Thai Gesneriaceae, including in the genus Microchirita. Vernacular.— Yat tham kra bok (หยาดถ้ำกระบอก) (proposed here).
Microchirita radiata D.J.Middleton, Daonurai, Poompayak & Suddee, sp. nov. Similar to Microchirita tubulosa (Craib) A.Weber & D.J.Middleton in general appearance and the large primarily white flowers but differs in the corolla tube orange inside, darker orange ventrally, with many radial brown lines dorsally and ventrally (white or very pale yellow inside, yellow ventrally, without brown lines or these only either side of yellow ventral stripe or rarely with additional very pale lines or dots ventrally in M. tubulosa) and the glabrous anthers (densely white pubescent in M. tubulosa). Type: Thailand, Saraburi, Kaeng Khoi District, ... Etymology.— The specific epithet refers to the brown lines radiating from the narrow part of the tube into the widened upper tube. Vernacular.— Yat phra pho thi sat (หยาดพระโพธิสัตว์) (proposed here).
M. simia D.J.Middleton, Thananth., Tetsana & Suddee, sp. nov. Similar to Microchirita purpurea D.J.Middleton & Triboun in the shape and size of the corolla but differs in the distinctive bright yellow and purple corollas (purple throughout in M. purpurea) and glabrous stamens (hairy at filament insertion in M. purpurea). Type: Thailand, Lop Buri, ... Etymology.— The specific epithet is Latin for monkey, in reference to the monkey-like face when viewing the corolla from the front. Vernacular.— Yat wa non pak (หยาดวานรพักตร์) (proposed here). David Middleton, Naiyana Tetsana, Pachok Puudja, Theerawat Thananthaisong, Kunanon Daonurai, Kerkwit Poompayak and Somran Suddee. 2024. Four more New Species of Microchirita (Gesneriaceae: Didymocarpoideae) from Thailand. Thai Forest Bulletin (Botany). 52(2), 80–88. DOI: doi.org/10.20531/tfb.2024.52.2.11 | ||||||||||
| 6:10p | [Botany • 2024] Gastrochilus balangshanensis (Orchidaceae: Aeridinae) • A New subalpine epiphytic Orchid from the Mountains of Southwest China
Abstract Gastrochilus balangshanensis, a new orchid species from the Balang Mountain, Sichuan Province, Southwest China, is described and illustrated. It morphologically resembles G. affinis, but differs in having shorter stems, a reniform epichile and a sub-hemispherical hypochile (spur), obtuse-rounded at the apex. The results of molecular phylogenetic analyses based on nuclear ribosome internal transcribed spacer (nrITS) and four chloroplast DNA markers (matK, psbA–trnH, psbM–trnD and trnL–F) from 50 Gastrochilus species indicate that G. balangshanensis is closely related to G. heminii and G. bernhardtianus, also endemic to the Hengduan Mountains. The novelty is a branch and trunk epiphyte in mixed coniferous forest. Key words: Hengduan Mountains, new species, phylogeny, Sichuan, Vandeae
Gastrochilus balangshanensis Jun Y.Zhang, B.Xu & Yue H.Cheng, sp. nov. Diagnosis: Gastrochilus balangshanensis is most similar to G. affinis, but can be distinguished by its shorter stem (1.5–3.5 vs. 3.0–12.0 cm), nearly elliptic leaves (vs. oblong-lanceolate to subspathulate), larger sepals (5.6–6.4 × 4.8–5.2 vs. 3.0–5.0 × 1.0–1.3 mm) and petals (5.0–5.8 × 4.0–4.4 vs. 3.0–4.0 × 1.0–1.3 mm), reniform epichile (vs. subtriangular) and sub-hemispherical hypochile, obtuse-rounded at the apex (vs. hypochile obconical, subacute to obtuse and shortly bifid at apex). Etymology: Its specific epithet refers to the Balang Mountain, type locality of this new orchid. A Chinese name, “ba lang shan peng ju lan” (巴朗山盆距兰), is suggested here. Jun-Yi Zhang, Yue-Hong Cheng, Min Liao, Sen-Long Jin, Hong-Qiang Lin, Pan-Yan Yang, Hai He and Bo Xu. 2024. Gastrochilus balangshanensis (Orchidaceae, Aeridinae), A New subalpine epiphytic Orchid from the Mountains of Southwest China. PhytoKeys. 247: 123-135. DOI: doi.org/10.3897/phytokeys.247.130755 |
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