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Impatiens wutaishanensis (Balsaminaceae), a new species from Southeast Yunnan, China.

ABSTRACT: Impatiens wutaishanensis R.L. Liao & Lei Cai, a new species from Southeast Yunnan, China, is here described and illustrated. This new species is most similar to Impatiens parvisepala S.X. Yu & Y.T. Hou in its racemose inflorescences, its four lateral sepals, the leaf arrangement, and in having yellow flowers. However, it differs in the height of the plants, the length of the petiole, the size and shape of the leaf blade, the shape of the spur, and the number of flowers in each inflorescence. A detailed description, color photographs, and a provisional IUCN red list assessment are provided, and its geographical distribution, ecology, and morphological relationship with relevant similar species are discussed.

SUBMITTER: Liao RL

PROVIDER: S-EPMC8065009 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Impatiens pandurata (Balsaminaceae), a new species from Yunnan, China.

Project description:BackgroundThe species-rich genus Impatiens is mainly distributed throughout much of tropical Africa, India, southwest Asia, southern China and Japan. There are more than 270 species recorded in China, most of which are restricted to the southwest. An unknown species of Impatiens was collected from Yunnan, southwest China.ResultsImpatiens pandurata Y. H. Tan & S. X. Yu, a new species of Balsaminaceae from Jinping County and Malipo County, Yunnan, China is similar to I. apalophylla and I. clavigera in having racemose inflorescences, 4 lateral sepals, hammer-shaped capsules and ellipsoid seeds, but differs in having leaves with oblanceolate blades aggregated at the top of the stem, 3-5-flowered racemes, a yellow lower sepal without reddish patches, yellowish flowers, and a dorsal petal with stalks at the base. Molecular phylogenetic analyses of sequences from both nuclear ribosomal and plastid genes confirm that this new species is distinct from morphologically similar species previously recorded.ConclusionWith the support of careful morphological studies and phylogenetic analysis, I. pandurata is a species new to science.

| S-EPMC5432899 | biostudies-literature

Impatiens bokorensis (Balsaminaceae), a new species from Cambodia.

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Description of a New Species and Lectotypification of Two Names in Impatiens Sect. Racemosae (Balsaminaceae) from China.

Project description:Impatiens longiaristata (Balsaminaceae), a new species from western Sichuan Province in China, is described and illustrated here based on morphological and molecular data. It is similar to I. longiloba and I. siculifer, but differs in its lower sepal with a long arista at the apex of the mouth, spur curved downward or circinate, and lower petal that is oblong-elliptic and two times longer than the upper petal. Molecular analysis confirmed its placement in sect. Racemosae. Simultaneously, during the inspection of the protologues and type specimens of allied species, it was found that the types of two names from this section were syntypes based on Article 9.6 of the International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code). According to Articles 8.1, 9.3, and Recommendations 9A.1, 9A.2, and 9A.3, the lectotypes of these two names are here designated.

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| S-EPMC9581419 | biostudies-literature

Carpinus gigabracteatus, a new species from southeast Yunnan, China.

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| S-EPMC7165198 | biostudies-literature

Carexmalipoensis (Cyperaceae), a new species from southeast Yunnan, China.

Project description:Carexmalipoensis, a new species from southeast Yunnan, China, is here described and illustrated. It is morphologically similar to C.trichophylla in sect. Euprepes, but differs from it by its longer inflorescences and peduncles, pendulous spikes, hispidulous female glumes, densely hispidulous utricles, and longer nutlets.

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Three new species of Impatiens (Balsaminaceae) from southern Western Ghats, Kerala.

Project description:Three new species of Impatiens, Impatiensachudanandanii, I.danii, and I.shailajae, are described from Thiruvananthapuram and Idukki districts of Kerala state (SW-India). Impatiensachudanandanii is similar to I.courtallensis and I.herbicola; I.danii to I.goughii and I.shailajae is to I.minae and I.scapiflora. The newly described taxa are readily distinguished from their allied species by unique character combinations, viz. shape of lateral sepal, lower sepal, dorsal petal, seed and pollen morphology. Detailed descriptions along with illustrations and photographs are provided.

| S-EPMC8379142 | biostudies-literature

The complete chloroplast genome of Impatiens mengtszeana (Balsaminaceae), an endemic species in China.

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| S-EPMC8856038 | biostudies-literature

Pollination ecology and pollination system of Impatiens reptans (Balsaminaceae) endemic to China.

Project description:Background and aimsChina is one of the centres of geographical distribution of Impatiens L. Studies of the pollination ecology of this genus in China have, until now, been unreported. Impatiens reptans, a species endemic to China, was studied. The aims were to examine the pollination ecology and pollination system of this species, to compare its pollination ecology with other Impatiens species growing in Sumatra and Japan, and to discuss possible reasons for its limited distribution.MethodsThe pollination ecology of I. reptans was studied by carrying out continuous observations within three naturally growing populations. Its pollination system was studied using different pollination methods, marking and counting pollen grains, assessing pollen viability and observing pollinator behaviour.Key resultsThe flowering phase of the protandrous I. reptans lasted for 89 d. The life span of an individual flower was 3.6 d. Primary pollinators were honey-bees and bumble-bees. Secondary pollinators were diurnal hawk moths and butterflies. Bombus briviceps and Bombus sp. were nectar gatherers. The mean nectar sugar concentration was 29.5 %, and the mean value of sucrose/glucose + fructose was 0.82. The proportion of seed set ranged from 0.857 to 0.873. Distances that seeds were ejected ranged from 0.58 to 1.17 m. Percentage seed germination under controlled conditions was 23.1. Pollen viability was highest on the day of anthesis and thereafter decreased. Ratios of pollen : ovules ranged from 958.8 to 970.6.ConclusionsImpatiens reptans reproduces by means of cross-pollination. Its dependence on a specialized habitat, a narrow environmental niche, a low percentage of seed germination, and habitat loss could be reasons for its limited distribution and endemism.

| S-EPMC4241072 | biostudies-literature

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