Studies on the Rocky Mountain Flora.-IV

Rydberg, Per Axel

doi:10.2307/2478392

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…I. mexicana was morphologically compared to the six other Impatiens taxa that occur in North America by drawing on information from original descriptions and available literature, including morphological traits and ecological information, as well as verified photographs of the referred species published online, which can provide helpful information that is not considered in the literature: I. mexicana [24,43]; I. aurella [3,24,25]; I. capensis [3,24,[68][69][70][71][72][73][74][75][76][77][78][79]; I. ecornuta [3,24,28,29]; I. pallida [24,30]; I. turrialbana [22][23][24]; I. nolitangere [1,21] and websites [33,80]. I. mexicana is separated from these six species by four general variations of yellow color, and the presence, shape, and disposition of spot patterns in the upper petal, lateral sepals, and lower sepal.…”

Section: Remarks and Differential Diagnosismentioning

confidence: 99%

“…The Mexican balsam is different from I. capensis (setting aside the possible exception of I. aurella, I. ecornuta and I. pallida whose masl is still unclear because of a lack of information) because it is distributed above 1900 masl (1925-2657); in contrast, the altitude distribution of orange balsam (I. capensis) oscillates between 39-1344 masl (see [3,24,25,[68][69][70][71]74,[76][77][78][79]86]).…”

Section: Remarks and Differential Diagnosismentioning

confidence: 99%

“…Today, the rich Impatiens species are grouped in five hotspots (Africa, Madagascar, South India, Sri-Lanka, Sino-Himalayas, and Southeast Asia), see [18][19][20] that extend across Old World tropics and subtropics). However, while the genus includes native species of temperate zones in Europe [21] and temperate, tropical, and subtropical regions of North America and Central America [22][23][24][25], there are no Australia or South America representatives [17,19].…”

Section: Introductionmentioning

confidence: 99%

“…The expansion of Impatiens to the Americas has been hypothesized to have occurred in the Pleistocene, with the species traveling from Southeast China (across the Bering Strait or the Aleutian Islands) some 1.26 million years ago [26]. Six species have been recognized: five North American species (I. aurella [25], I. capensis [27], I. ecornuta [28,29], I. pallida [30], and I. mexicana [24]), and a Central American counterpart (I. turrialbana [22,23]). However, I. noli-tangere [21], a predominantly Eurasian species, has also been reported in North America, in the Pacific northwest, southern Canada, British Columbia, South Alaska, and northwest Washington state [31,32].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Mexican Balsam, Impatiens mexicana Rydb: A Redescription Based on Morphological and Phylogenetic Studies, with an Update of the Current Geographical Range of the Species

Monzalvo,

Escorcia-Guerrero,

García-Montes

et al. 2024

Diversity

View full text Add to dashboard Cite

Impatiens mexicana is a native balsam restricted to the cloud forests of central and southwest Mexico, which is currently known to exist in four states (Zacatecas, Veracruz, Puebla, and Oaxaca), and is probably threatened by geographic restriction. Morphological and distributional information about this species is still scarce, with only a couple of investigations since its first description in 1910, which means the phylogenetic position of this species has yet to be placed. In order to contribute to knowledge of I. mexicana, morphological and molecular studies were carried out with material collected in the localities of Hidalgo, Veracruz, and Oaxaca, during expeditions from July to October 2021 and in 2022. The specimens selected were measured, photographed, and compared with morphological information from the six American balsams. At the same time, phylogenetic studies were carried out by using two regions of the cpDNA and one of the nrDNA. We report I. mexicana for the first time in Hidalgo state, and identify new registers in the Veracruz and Oaxaca localities, thus increasing the knowledge in its geographic distribution. We also redescribe the Mexican balsam by using new and complementary traits: we note that while the species is morphologically similar to I. capensis, it is distinguished by differences in flower color, the distribution of spot patterns on the upper petal, lower sepal, and lateral petals, and geographic information such as endemic geographic distribution in Mexico’s Tropical Montane Cloud Forest (TMCF). We also carried out phylogenetic analyses by using ITS and ITS + atpb-rbcL, which showed the Mexican balsam was independent from its Asian-American congeners. Interestingly, our genetic distance analyses reveal differences of 0.01–0.16% between I. mexicana and the other North American congeners that use ITS, atpb-rbcL and trnL-F, both independently and as concatenated genes: this low divergence most likely occurred because of the recent diversification of the group. However, both future redescriptions and phylogenetic studies in American species are imperative, as this will enable better discrimination.

show abstract