Difference between revisions of "Carsonia"
Pittonia 4: 211. 1900.
FNA>Volume Importer |
imported>Volume Importer |
||
| (4 intermediate revisions by 2 users not shown) | |||
| Line 44: | Line 44: | ||
|publication year=1900 | |publication year=1900 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_280.xml |
|genus=Carsonia | |genus=Carsonia | ||
}}<!-- | }}<!-- | ||
-->[[Category:Treatment]][[Category:Cleomaceae]] | -->[[Category:Treatment]][[Category:Cleomaceae]] | ||
Latest revision as of 22:32, 5 November 2020
Herbs, annual. Stems profusely branched; glabrous. Leaves: stipules scalelike or absent; petiole with pulvinus basally or distally; leaflets 1 or 3. Inflorescences terminal or axillary (from distal leaves), racemes (flat-topped or elongated); bracts present. Flowers weakly zygomorphic; sepals deciduous, distinct, equal; petals equal (each with an epipetalous nectiferous scale); stamens 6; filaments inserted on 4-lobed androgynophore, glabrous; anthers (linear), coiling as pollen is released; gynophore erect in fruit. Fruits capsules, dehiscent, oblong. Seeds 10–13, oblong, not arillate, (cleft fused between ends). x = 16.
Distribution
sw United States.
Discussion
Species 1.
A peculiar desert xerophyte with subsessile, erect capsules, and unique petal glands, Carsonia is segregated from Peritoma by its unique cytology (2n = 32). Whether it is autochthonously specialized or actually related to, and derived from, some Old World ancestors, such as the Central Asiatic-Near Eastern Cleome sect. Thylacophora Franch, the dozen or so species of which, probably through convergence, also bear epipetaloid glands, remains to be determined.
Selected References
None.