Difference between revisions of "Cevallia sinuata"

Lagasca

Varied. Ci. 2(4): 36. 1805.

Selected by author to be illustrated
Treatment appears in FNA Volume 12. Treatment on page 493.
FNA>Volume Importer
 
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|elevation=130–2000 m.
 
|elevation=130–2000 m.
 
|distribution=Ariz.;N.Mex.;Okla.;Tex.;Mexico (Chihuahua;Coahuila;Durango;Zacatecas).
 
|distribution=Ariz.;N.Mex.;Okla.;Tex.;Mexico (Chihuahua;Coahuila;Durango;Zacatecas).
|discussion=<p>The small flowers of Cevallia sinuata have an architecture that promotes deposition of self-pollen on the densely hairy stigma. The absence of a nectary in the flowers may reflect selection for self-pollination or for a pollen-flower pollination syndrome (a so-called pollen flower mimic in the sense of S. Vogel 1978) that possibly involves secondary pollen presentation on the stigma. Various insects, especially bees but also butterflies, have been observed to visit the flowers (W. S. Davis and H. J. Thompson 1967; A. M. Powell et al. 1977). The flowers undoubtedly self-pollinate, but it is unclear whether they self-fertilize or may be self-incompatible.</p><!--
+
|discussion=<p>The small flowers of <i>Cevallia sinuata</i> have an architecture that promotes deposition of self-pollen on the densely hairy stigma. The absence of a nectary in the flowers may reflect selection for self-pollination or for a pollen-flower pollination syndrome (a so-called pollen flower mimic in the sense of S. Vogel 1978) that possibly involves secondary pollen presentation on the stigma. Various insects, especially bees but also butterflies, have been observed to visit the flowers (W. S. Davis and H. J. Thompson 1967; A. M. Powell et al. 1977). The flowers undoubtedly self-pollinate, but it is unclear whether they self-fertilize or may be self-incompatible.</p><!--
 
--><p>A. M. Powell et al. (1977) noted that populations of n = 7 and n = 13 cytotypes can be found, and that the latter have a larger geographic distribution and wider ecological tolerance compared to the former. They hypothesized that n = 13 populations were derived via polyploidization followed by aneuploidy.</p>
 
--><p>A. M. Powell et al. (1977) noted that populations of n = 7 and n = 13 cytotypes can be found, and that the latter have a larger geographic distribution and wider ecological tolerance compared to the former. They hypothesized that n = 13 populations were derived via polyploidization followed by aneuploidy.</p>
 
|tables=
 
|tables=
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|publication year=1805
 
|publication year=1805
 
|special status=Selected by author to be illustrated
 
|special status=Selected by author to be illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V12/V12_609.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V12/V12_609.xml
 
|genus=Cevallia
 
|genus=Cevallia
 
|species=Cevallia sinuata
 
|species=Cevallia sinuata

Revision as of 15:48, 18 September 2019

Plants to 6 dm. Leaves: petiole 0–3[–8] mm; blade to 6 × 3 cm, pinnately lobed ± 1/2 to midrib, base usually oblique, acute to obtuse, apex acute with rounded tip; midvein and secondary veins prominent. Flowers: perianth densely covered with long, pointed hairs; sepals 8–9 mm; petals 6–8 mm; stamen filaments 1 mm. 2n = 14, 26.


Phenology: Flowering Apr–Oct.
Habitat: Gypsum and limestone hills, gravelly flats, open desert scrub, Tamaulipan thorn scrub, grasslands.
Elevation: 130–2000 m.

Distribution

V12 609-distribution-map.jpg

Ariz., N.Mex., Okla., Tex., Mexico (Chihuahua, Coahuila, Durango, Zacatecas).

Discussion

The small flowers of Cevallia sinuata have an architecture that promotes deposition of self-pollen on the densely hairy stigma. The absence of a nectary in the flowers may reflect selection for self-pollination or for a pollen-flower pollination syndrome (a so-called pollen flower mimic in the sense of S. Vogel 1978) that possibly involves secondary pollen presentation on the stigma. Various insects, especially bees but also butterflies, have been observed to visit the flowers (W. S. Davis and H. J. Thompson 1967; A. M. Powell et al. 1977). The flowers undoubtedly self-pollinate, but it is unclear whether they self-fertilize or may be self-incompatible.

A. M. Powell et al. (1977) noted that populations of n = 7 and n = 13 cytotypes can be found, and that the latter have a larger geographic distribution and wider ecological tolerance compared to the former. They hypothesized that n = 13 populations were derived via polyploidization followed by aneuploidy.

Selected References

None.

Lower Taxa

None.
... more about "Cevallia sinuata"
Larry Hufford +
Lagasca +
Ariz. +, N.Mex. +, Okla. +, Tex. +, Mexico (Chihuahua +, Coahuila +, Durango +  and Zacatecas). +
130–2000 m. +
Gypsum and limestone hills, gravelly flats, open desert scrub, Tamaulipan thorn scrub, grasslands. +
Flowering Apr–Oct. +
Varied. Ci. +
Selected by author to be illustrated +
Cevallia sinuata +
Cevallia +
species +