The taxonomic relationships of Clarkia calientensis were re-evaluated in light of information accumulated subsequent to its designation as C. tembloriensis subsp. calientensis. Closeness of relationship between C. calientensis and C. tembloriensis was based on ease of crossing and on cytological pairing configurations in intertaxon hybrids. These interpretations require the assumptions that closely related species are easy to cross, and that maximum cytological configurations are known. However, extensive crossing data show that sympatric, closely related species of Clarkia are very difficult to cross but allopatric species cross rather readily. Furthermore, the cytological data are incomplete as maximum configurations are seldom observed, and some hybrids have not been produced. In both cases, the required assumptions are not tenable. Sterile hybrids between these two easily crossed taxa are strong evidence that they are not conspecific. Consequently, C. calientensis should be recognized as an independent species. Examination of floral variation in C. tembloriensis led to the recognition of large-flowered, protandrous forms as a new subspecies: C. tembloriensis subsp. longistyla.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 55 • No. 4