Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records: 3
Specimens with Sequences: 2
Specimens with Barcodes: 2
Species: 2
Species With Barcodes: 2
Public Records: 2
Public Species: 2
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Wikipedia

Phoebanthus

Phoebanthus is a genus of flowering plants in the family Asteraceae. It includes two species of herbaceous perennials that are both endemic to the U.S. state of Florida. The genus is a close relative to Helianthus, the genus of the common sunflower, and the plants have the general appearance of a sunflower.

Description

Phoebanthus is characterized by having a pappus of short scales that are usually persistent (don't fall off) compared to the pappus of two deciduous awns (and sometimes a few scales) in Helianthus, and Phoebanthus is also characterized by a distinctive type of slender, horizontal tuber that forms the perennating organ.

  • Phoebanthus tenuifolius is a diploid that occurs in a relatively small area in the panhandle area of Florida, where it occurs in only 4 counties (Calhoun, Franklin, Gulf, and Liberty) and it is listed by the state as a "Threatened Species".
  • Phoebanthus grandiflorus is a tetraploid that occurs in peninsular Florida where it has a somewhat broader distribution from Clay and Alachua counties in the north as far south as the area just north of Lake Okeechobee.

The relationship between the two species has never been closely analyzed, but it does not appear that P. grandiflorus is simply an autotetraploid of P. tenuifolius.[1]

Species include:

References

  1. ^ Schilling, E. E., C. R. Linder, R. D. Noyes, and L. H. Rieseberg. 1998. Phylogenetic relationships in Helianthus (Asteraceae) based on nuclear ribosomal DNA internal transcribed spacer region sequence data. Systematic Botany 23: 177-187.
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