Difference between revisions of "Brachystigma"
Proc. Acad. Nat. Sci. Philadelphia 80: 432. 1928.
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--><p><i>Brachystigma</i> is monospecific and narrowly restricted to dry mountain slopes of southeastern Arizona, southwestern New Mexico, and northern Mexico. F. W. Pennell (1928) differentiated it from the similar genus <i>Agalinis</i> by its yellow corollas, glabrous anthers, capitate stigmas, more acute capsules, and winged seeds. Phylogenetic analysis of three chloroplast genes supports this distinction (M. C. Neel and M. P. Cummings 2004). Further, <i>Brachystigma</i> may be differentiated from closely related genera <i>Aureolaria</i>, <i>Dasistoma</i>, and <i>Seymeria</i> by its leaves arranged in whorls of three, a characteristic unique in Orobanchaceae.</p> | --><p><i>Brachystigma</i> is monospecific and narrowly restricted to dry mountain slopes of southeastern Arizona, southwestern New Mexico, and northern Mexico. F. W. Pennell (1928) differentiated it from the similar genus <i>Agalinis</i> by its yellow corollas, glabrous anthers, capitate stigmas, more acute capsules, and winged seeds. Phylogenetic analysis of three chloroplast genes supports this distinction (M. C. Neel and M. P. Cummings 2004). Further, <i>Brachystigma</i> may be differentiated from closely related genera <i>Aureolaria</i>, <i>Dasistoma</i>, and <i>Seymeria</i> by its leaves arranged in whorls of three, a characteristic unique in Orobanchaceae.</p> | ||
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| + | |id=pennell1928a | ||
| + | |text=Pennell, F. W. 1928. Agalinis and allies in North America: I. Proc. Acad. Nat. Sci. Philadelphia 80: 339–449. | ||
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|illustration copyright=Flora of North America Association | |illustration copyright=Flora of North America Association | ||
|distribution=sw United States;n Mexico. | |distribution=sw United States;n Mexico. | ||
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|publication title=Proc. Acad. Nat. Sci. Philadelphia | |publication title=Proc. Acad. Nat. Sci. Philadelphia | ||
|publication year=1928 | |publication year=1928 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V17/V17_997.xml |
|genus=Brachystigma | |genus=Brachystigma | ||
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-->[[Category:Treatment]][[Category:Orobanchaceae]] | -->[[Category:Treatment]][[Category:Orobanchaceae]] | ||
Latest revision as of 19:38, 5 November 2020
Herbs, perennial; hemiparasitic, caudex woody. Stems erect, not fleshy, hirsutulous. Leaves cauline, in whorls of 3; petiole absent; blade not fleshy, not leathery, margins entire. Inflorescences terminal, racemes; bracts present. Pedicels present; bracteoles absent. Flowers: sepals 5, calyx nearly radially symmetric, broadly campanulate, lobes deltate; petals 5, corolla yellow, bilabiate, subrotate, abaxial lobes 3, adaxial 2; stamens 4, didynamous, filaments glabrescent proximally, villous distally; staminode 0; ovary 2-locular, placentation axile; stigma clavate. Capsules: dehiscence loculicidal. Seeds 100+, dark brown, ellipsoid, wings absent or present.
Distribution
sw United States, n Mexico.
Discussion
Species 1.
Brachystigma is monospecific and narrowly restricted to dry mountain slopes of southeastern Arizona, southwestern New Mexico, and northern Mexico. F. W. Pennell (1928) differentiated it from the similar genus Agalinis by its yellow corollas, glabrous anthers, capitate stigmas, more acute capsules, and winged seeds. Phylogenetic analysis of three chloroplast genes supports this distinction (M. C. Neel and M. P. Cummings 2004). Further, Brachystigma may be differentiated from closely related genera Aureolaria, Dasistoma, and Seymeria by its leaves arranged in whorls of three, a characteristic unique in Orobanchaceae.