Example sentences for: disciform

How can you use “disciform” in a sentence? Here are some example sentences to help you improve your vocabulary:

  • However, these two genera were removed from Artemisia s.l ., and on the basis of spiny pollen have been considered transitional between the Artemisia -group and four radiate genera: Tridactylina Arctanthemum, Brachanthemum, and Dendranthema . Our ITS phylogeny places disciform Ajania sister to radiate Arctanthemum derived from within the Arctanthemum-Dendranthema clade, rather than sister to the Artemisia -group.

  • It is apparently defined taxonomically on the basis of plesiomorphies (heterogamous, disciform capitula with perfect/fertile disk florets and pistillate ray florets), and needs to be re-circumscribed.

  • In addition, plants with discoid capitula are considered homogamous since all florets are of one sexual form (perfect-bisexual disk florets), and plants with disciform capitula are considered heterogamous with two or more sexual forms ( i.e., pistillate rays and perfect disks, or pistillate rays and staminate disks).

  • Kaschgaria was removed by Poljakov from Artemisia s.l . on the basis of stellate corolla hairs, and was considered more closely related to Seriphidium than Artemisia s.s ., even though it is disciform rather than discoid [ 2 ] . Kaschgaria possesses spineless pollen [ 2 37 ] . Therefore, placement of Kaschgaria and Elachanthemum outside of the Artemisia -group is intriguing because if these placements remain robust, wind-pollination may have arisen more than once in the tribe, or insect-pollination may be secondarily derived within Subtribe Artemisiinae in the radiate genera (clade 3 of Fig.

  • The occasional appearance of disciform capitula in S. bigelowii might be explained by introgression of genes or alleles from A. filfolia that control ray expression, a phenomenon observed in discoid Senecio squallidus and radiate S. vulgaris in Europe [ 67 ] . While this is speculative, it is consistent with hypotheses that hybridization and introgression are widespread in sect.


How many words do you know? Try our free vocabulary size test!


Search

Search for example sentences

Loading Loading...
Quantcast