Difference between revisions of "Amberboa"
Syn. Gen. Compos., 8. 1832.
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--><p><i>Amberboa</i> has often been included within <i>Centaurea</i>, from which it differs by cypselae each with a denticulate apex and a conspicuous rim around the basal scar. The chromosome base number x = 16 is higher than that in most species of <i>Centaurea</i> in a strict sense. Molecular phylogenetic studies of the relationships of Cynareae genera (A. Susanna et al. 1995) place <i>Amberboa</i> as sister to the remaining genera of the Centaureinae.</p> | --><p><i>Amberboa</i> has often been included within <i>Centaurea</i>, from which it differs by cypselae each with a denticulate apex and a conspicuous rim around the basal scar. The chromosome base number x = 16 is higher than that in most species of <i>Centaurea</i> in a strict sense. Molecular phylogenetic studies of the relationships of Cynareae genera (A. Susanna et al. 1995) place <i>Amberboa</i> as sister to the remaining genera of the Centaureinae.</p> | ||
|tables= | |tables= | ||
| − | |references= | + | |references={{Treatment/Reference |
| + | |id=gabrielian1996a | ||
| + | |text=Gabrielian, E. and C. E. Jarvis. 1996. Amberboa moschata, A. glauca, and A. amberboi (Asteraceae: Cardueae). A note on their taxonomy and typification of their names. Taxon 45: 213–215. 1996. | ||
| + | }}{{Treatment/Reference | ||
| + | |id=iljin1932a | ||
| + | |text=Iljin, M. M. 1932. A critical survey of the genus Amberboa Less. Izv. Bot. Sada Akad. Nauk S.S.S.R. 30: 101–116. | ||
| + | }} | ||
}}<!-- | }}<!-- | ||
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|distribution=Mediterranean region to c Asia. | |distribution=Mediterranean region to c Asia. | ||
|introduced=true | |introduced=true | ||
| − | |reference= | + | |reference=gabrielian1996a;iljin1932a |
|publication title=Syn. Gen. Compos., | |publication title=Syn. Gen. Compos., | ||
|publication year=1832 | |publication year=1832 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V19-20-21/V19_189.xml |
|tribe=Asteraceae tribe Cardueae | |tribe=Asteraceae tribe Cardueae | ||
|genus=Amberboa | |genus=Amberboa | ||
Revision as of 21:15, 16 December 2019
Annuals or biennials, 20–70 cm; herbage not prickly, glabrate. Stems erect, usually branched from near bases. Leaves basal and cauline (distal smaller); petiolate (basal and proximal cauline) or sessile (distal cauline); blade margins dentate or ± lobed (basal) or entire to lobed (cauline). Heads ± radiant, borne singly. (Peduncles slender.) Involucres ovoid, 12–16 mm diam. Phyllaries many in several series, bases appressed, margins scarious, apices obtuse, inner with oblong, scarious appendages, these entire or spiny. Receptacles flat, epaleate, bearing setiform scales (“flattened bristles”). Florets many; corollas white to pink, purple, or yellow; outer sterile, corollas expanded, raylike, bilateral, 5–many-lobed; inner fertile, corollas actinomorphic; anther bases tailed, apical appendages oblong; styles branches: fused portions with basal nodes minutely hairy, distinct portions minute. Cypselae oblong, compressed, (apices denticulate), faces ribbed, wrinkled, with long, ascending hairs, basal attachment scars lateral, surrounded by whitish, swollen rims; pappi persistent, of many scales in several series, distinct, narrow [rarely 0]. x = 16.
Distribution
Mediterranean region to c Asia.
Discussion
Species 6 (1 in the flora).
Amberboa has often been included within Centaurea, from which it differs by cypselae each with a denticulate apex and a conspicuous rim around the basal scar. The chromosome base number x = 16 is higher than that in most species of Centaurea in a strict sense. Molecular phylogenetic studies of the relationships of Cynareae genera (A. Susanna et al. 1995) place Amberboa as sister to the remaining genera of the Centaureinae.