Stelis breviloba (Orchidaceae, Pleurothallidinae), a new species from Mexico

IF 1.1 4区 生物学 Q3 PLANT SCIENCES Botanical Sciences Pub Date : 2023-06-30 DOI:10.17129/botsci.3307
R. Solano, G. Salazar
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Abstract

Background: Stelis subgen. Physosiphon is basically a Meso-American group, and its best-known species is Stelis emarginata, characterized by its reddish orange flowers and distribution along the Gulf of Mexico slope in Mexico and Guatemala. Morphologically similar specimens from the Sierra Madre del Sur, on the Pacific slope of Guerrero and Oaxaca could represent a different and undescribed taxon. Question: Are the Sierra Madre del Sur populations similar to Stelis emarginata a different species? Study site: Sierra Madre del Sur in Guerrero and Oaxaca, Mexico. Methods: The description of the new species was based on live and pressed specimens; a line drawing and photographs were made from fresh material; its known localities were georeferenced and displayed on a map of Mexico. A morphological comparison of the new taxon with similar species was done based on specialized literature. Results: Stelis breviloba is described and illustrated as a new species from southern Guerrero and Oaxaca. It differs from S. emarginata by its shorter plants, less floriferous racemes, smaller flowers, oblong petals, and its allopatric distribution, restricted to the Pacific slope of the Sierra Madre del Sur. A key for the identification of the Mesoamerican species of Stelis subgen. Physosiphon is provided. Conclusion: Stelis breviloba is an endemic of the Sierra Madre del Sur and probable vicariant species of S. emarginata. Most species of Stelis subgen. Physosiphon (six out of eight) are present in the Mexican flora.
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短叶Stelis brevloba(兰科,Pleurothalidinae),墨西哥一新种
背景:Stelis亚群。Physosiphon基本上是一个中美洲群体,其最著名的物种是Stelis emarginata,其特征是其红橙色的花朵,分布在墨西哥和危地马拉的墨西哥湾斜坡上。在格雷罗州和瓦哈卡州的太平洋斜坡上,来自南马德雷山的形态相似的标本可能代表一个不同的、未被描述的分类群。问题:塞拉马德雷德尔南部的种群类似于Stelis marginata是不同的物种吗?研究地点:墨西哥格雷罗州和瓦哈卡州的南马德雷山脉。方法:利用活标本和压标本对新种进行描述;线条画和照片都是用新鲜的材料制作的;它已知的地点被地理参考并显示在墨西哥地图上。在文献资料的基础上,对新分类单元与同类进行了形态比较。结果:在格雷罗州南部和瓦哈卡州发现了一新种——短叶蕨(Stelis breviloba)。它的不同之处是它的植株较短,总状花序较少,花较小,花瓣长圆形,其异域分布仅限于南马德雷山脉的太平洋斜坡。一种鉴定中美洲Stelis亚属物种的关键。提供物理虹吸。结论:短螺旋藻是南马德雷山脉特有的一种,可能是马德雷山螺旋藻的变种。柱石属亚属的大多数种。在墨西哥的植物区系中,有六种是水母。
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来源期刊
Botanical Sciences
Botanical Sciences Agricultural and Biological Sciences-Plant Science
CiteScore
1.90
自引率
21.40%
发文量
71
审稿时长
16 weeks
期刊介绍: Botanical Sciences welcomes contributions that present original, previously unpublished results in Botany, including disciplines such as ecology and evolution, structure and function, systematics and taxonomy, in addition to other areas related to the study of plants. Research reviews are also accepted if they summarize recent advances in a subject, discipline, area, or developmental trend of botany; these should include an analytical, critical, and interpretative approach to a specific topic. Acceptance for reviews will be evaluated first by the Review Editor. Opinion Notes and Book Reviews are also published as long as a relevant contribution in the study of Botany is explained and supported.
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