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336
datasets available to search
ShareScore release 0.9.0
Dataset results
336 results for “Lobelia”
Lobelia spicata (Campanulaceae) - inflorescence - lateral view of flower
Image of Lobelia spicata (Campanulaceae) - inflorescence - lateral view of flower
Lobelia spicata (Campanulaceae) - inflorescence - whole - unspecified
Image of Lobelia spicata (Campanulaceae) - inflorescence - whole - unspecified
Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Image of Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Lobelia spicata (Campanulaceae) - whole plant - in flower - general view
Image of Lobelia spicata (Campanulaceae) - whole plant - in flower - general view
Lobelia inflata (Campanulaceae) - leaf - margin of upper + lower surface
Image of Lobelia inflata (Campanulaceae) - leaf - margin of upper + lower surface
Lobelia spicata (Campanulaceae) - leaf - basal or on lower stem
Image of Lobelia spicata (Campanulaceae) - leaf - basal or on lower stem
Lobelia inflata (Campanulaceae) - inflorescence - unspecified
Image of Lobelia inflata (Campanulaceae) - inflorescence - unspecified
Lobelia inflata (Campanulaceae) - whole plant - in flower - general view
Image of Lobelia inflata (Campanulaceae) - whole plant - in flower - general view
Lobelia spicata (Campanulaceae) - inflorescence - frontal view of flower
Image of Lobelia spicata (Campanulaceae) - inflorescence - frontal view of flower
Lobelia inflata (Campanulaceae) - leaf - basal or on lower stem
Image of Lobelia inflata (Campanulaceae) - leaf - basal or on lower stem
Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Image of Lobelia inflata (Campanulaceae) - inflorescence - lateral view of flower
Lobelia inflata (Campanulaceae) - inflorescence - whole - unspecified
Image of Lobelia inflata (Campanulaceae) - inflorescence - whole - unspecified
Lobelia inflata (Campanulaceae) - leaf - on upper stem
Image of Lobelia inflata (Campanulaceae) - leaf - on upper stem
Lobelia cardinalis decontaminated FSCR
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Plasticity in floral longevity and sex-phase duration of Lobelia siphilitica in response to simulated pollinator declines
<p><strong>Premise: </strong>Pollinator declines can reduce the quantity and quality of pollination services, resulting in less pollen deposited on flowers and lower seed production by plants. In response to these reductions, plants can increase the opportunity for pollination by plastically adjusting their floral traits, including floral longevity and sex-phase duration. However, studies of plant responses to pollinator declines have primarily focused on floral evolution across generations rather than plasticity in floral traits within a generation.</p> <p><strong>Methods:</strong> To test whether plants can respond to pollinator declines by plastically adjusting their floral traits, we simulated declines by experimentally reducing pollinator access to Lobelia siphilitica plants, and measuring floral longevity and male- and female-phase duration. We also measured daily display size and phenotypic gender to test whether plasticity in floral longevity and sex-phase duration affected inflorescence traits.</p> <p><strong>Results:</strong> We found that experimentally reducing pollination extended the male-phase duration of early-season flowers and the longevity of late-season flowers. However, plants with an extended male phase did not have a more male-biased phenotypic gender, and plants with an extended floral longevity did not have a larger daily display.</p> <p><strong>Conclusions:</strong> Our results suggest that L . siphilitica plants can respond to pollinator declines by plastically adjusting both the longevity and sex-phase duration of their flowers. Consequently, plasticity in floral traits could be one mechanism by which plants respond to decreases in pollination services caused by pollinator declines.</p>
FIGURE 1 in Nomenclatural and taxonomic survey of the South American clade of Lobelia section Rhynchopetalum (Campanulaceae)
FIGURE 1. Geographic distribution of Lobelia sect. Rhynchopetalum in South America. Species occurrences are represented by red stars.
Data from: Do genetic drift and gene flow affect the geographic distribution of female plants in gynodioecious Lobelia siphilitica?
<p>Variation in population sex ratio is particularly pronounced in gynodioecious angiosperms. Extremely high female frequencies in gynodioecious populations cannot be readily explained by selective forces alone. To assess the contributions of drift and gene flow to extreme sex-ratio variation, we documented sex ratio and population size in 92 populations of <em>Lobelia siphilitica</em> across its range and genotyped plants using plastid and nuclear genetic markers. Similarity in spatial patterns of genetic and demographic variables may suggest that drift and/or gene flow have contributed to population sex-ratio variation in <em>L. siphilitica</em>. We found strong spatial structuring of extremely high female frequencies: populations with >50% female plants are restricted to the south–central portion of the range. However, we did not detect any spatial structuring in population size nor metrics of genetic diversity, suggesting that extreme variation in female frequency is not strongly affected by drift or gene flow. Extreme sex-ratio variation is frequently observed in gynodioecious plants, but its causes are difficult to identify. Further investigation into mechanisms that create or maintain spatial structure of sex ratios in gynodioecious species will provide much needed insight.</p>
Lobelia cardinalis decontaminated gx
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FIGURE. Lobelia alanae M.A in A new species of Lobelia (Campanulaceae: Lobelioideae) from the Sierra Madre Oriental, Mexico
FIGURE. Lobelia alanae M.A. Pérez-Pérez & T. Ayers A. Flowering branch. B. Flower from above showing lateral calyx lobes crossed over dorsal lobe. C. Capsule. D. Seed about 1 mm in length. E. Landscape of Espinazo del Diablo and Apulco river. F. Type locality. Pictures taken from the type collection M. Jiménez-Chimil and M. Gorostiza-Salazar 31421.
FIGURE. Lobelia alanae M.A in A new species of Lobelia (Campanulaceae: Lobelioideae) from the Sierra Madre Oriental, Mexico
FIGURE. Lobelia alanae M.A. Pérez-Pérez & T. Ayers. A. Habit. B. Flower top view. C. Flower side view. D. Capsule. and E. Tooth on leaf margin.
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