Difference between revisions of "Physaria didymocarpa"
Gen. Amer. Bor. 1: 162. 1848.
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|name=Vesicaria didymocarpa | |name=Vesicaria didymocarpa | ||
|authority=Hooker | |authority=Hooker | ||
| + | |rank=species | ||
|publication_title=Fl. Bor.-Amer. | |publication_title=Fl. Bor.-Amer. | ||
|publication_place=1: 49, plate 16. 1830 | |publication_place=1: 49, plate 16. 1830 | ||
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|name=Coulterina didymocarpa | |name=Coulterina didymocarpa | ||
|authority=(Hooker) Kuntze | |authority=(Hooker) Kuntze | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Brassicaceae;Brassicaceae tribe Physarieae;Physaria;Physaria didymocarpa | |hierarchy=Brassicaceae;Brassicaceae tribe Physarieae;Physaria;Physaria didymocarpa | ||
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|distribution=w North America. | |distribution=w North America. | ||
|discussion=<p>Subspecies 3 (3 in the flora).</p><!-- | |discussion=<p>Subspecies 3 (3 in the flora).</p><!-- | ||
| − | --><p>The characters used to differentiate <i>Physaria didymocarpa</i> from <i>P. saximontana</i> (especially < | + | --><p>The characters used to differentiate <i>Physaria didymocarpa</i> from <i>P. saximontana</i> (especially <i></i>subsp.<i> dentata</i>) appear to be weak at best: whether there are 4 or 8 ovules per ovary and whether the silicle lacks a basal sinus or one is present. There appears to be intergradation in each of those characters. A traditional circumscription of these species is followed here. Further work is needed at both the species and subspecies level in these taxa.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Physaria didymocarpa | name=Physaria didymocarpa | ||
| − | |||
|authority=(Hooker) A. Gray | |authority=(Hooker) A. Gray | ||
|rank=species | |rank=species | ||
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|publication year=1848 | |publication year=1848 | ||
|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/V7/V7_1039.xml |
|tribe=Brassicaceae tribe Physarieae | |tribe=Brassicaceae tribe Physarieae | ||
|genus=Physaria | |genus=Physaria | ||
Revision as of 23:11, 16 December 2019
Perennials; caudex branched, (cespitose); densely pubescent, trichomes (often stalked, appressed to wavy and spreading), several-rayed, rays furcate or simple, (slightly to strongly umbonate, nearly smooth to strongly tuberculate). Stems several from base, decumbent, (unbranched, leafy for the genus), ca. 1 dm. Basal leaves (forming a strong rosette; long-petiolate); blade obovate, 1.5–4(–8) cm, (base ± abruptly narrowing to petiole), margins usually repand or dentate, rarely entire, (apex usually angular, surfaces silvery). Cauline leaves: blade oblanceolate, 1–2 cm (width 4–8 mm), margins entire or with occasional tooth, (apex acute). Racemes congested, (elongated in fruit, greatly exceeding leaves). Fruiting pedicels (spreading, straight or slightly curved), 8–12 mm. Flowers: sepals lanceolate to oblong, 6–8 mm, (often keeled); petals spatulate, 10–12 mm. Fruits (erect), didymous, inflated, 10–20 × 10–20 mm, (papery or firm, basal sinus shallow to deep, sometimes barely notched, apical sinus deep, narrow, usually closed); valves (retaining seeds after dehiscence), loosely pubescent, trichomes spreading (appearing fuzzy); replum obovate to broadly oblong, not constricted, 3–4 mm, as wide as or wider than fruit, apex obtuse; ovules (4–)8 per ovary; style 7–9 mm. Seeds flattened.
Distribution
w North America.
Discussion
Subspecies 3 (3 in the flora).
The characters used to differentiate Physaria didymocarpa from P. saximontana (especially subsp. dentata) appear to be weak at best: whether there are 4 or 8 ovules per ovary and whether the silicle lacks a basal sinus or one is present. There appears to be intergradation in each of those characters. A traditional circumscription of these species is followed here. Further work is needed at both the species and subspecies level in these taxa.
Selected References
None.
Lower Taxa
Key
| 1 | Trichomes spreading throughout; basal leaf blade margins dentate. | Physaria didymocarpa subsp. lanata |
| 1 | Trichomes appressed (except fruits in subsp. didymocarpa); basal leaf blade margins repand to dentate, ± lyrate or, rarely, entire | > 2 |
| 2 | Fruits moderately inflated, trichomes spreading. | Physaria didymocarpa subsp. didymocarpa |
| 2 | Fruits highly inflated (papery), trichomes appressed. | Physaria didymocarpa subsp. lyrata |