Difference between revisions of "Boechera rigidissima"
Novon 13: 389. 2003.
FNA>Volume Importer |
imported>Volume Importer |
||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 10: | Line 10: | ||
|name=Arabis rigidissima | |name=Arabis rigidissima | ||
|authority=Rollins | |authority=Rollins | ||
| + | |rank=species | ||
|publication_title=Rhodora | |publication_title=Rhodora | ||
|publication_place=43: 380, fig. 2. 1941 | |publication_place=43: 380, fig. 2. 1941 | ||
| Line 16: | Line 17: | ||
|name=Arabis rigidissima var. demota | |name=Arabis rigidissima var. demota | ||
|authority=Rollins | |authority=Rollins | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Brassicaceae;Brassicaceae tribe Boechereae;Boechera;Boechera rigidissima | |hierarchy=Brassicaceae;Brassicaceae tribe Boechereae;Boechera;Boechera rigidissima | ||
| Line 41: | Line 43: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Boechera rigidissima | name=Boechera rigidissima | ||
| − | |||
|authority=(Rollins) Al-Shehbaz | |authority=(Rollins) Al-Shehbaz | ||
|rank=species | |rank=species | ||
| Line 56: | Line 57: | ||
|publication year=2003 | |publication year=2003 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_582.xml |
|tribe=Brassicaceae tribe Boechereae | |tribe=Brassicaceae tribe Boechereae | ||
|genus=Boechera | |genus=Boechera | ||
Latest revision as of 23:34, 5 November 2020
Perennials; long-lived; apomictic; caudex woody. Stems usually 1 per caudex branch, arising from center of rosette, slightly elevated on woody base or from near ground surface, 2–6 dm, pubescent proximally, trichomes usually subsessile, 2- or 3-rayed, rarely simple, 0.25–0.4 mm, glabrous distally. Basal leaves: blade oblanceolate, 2–6 mm wide, margins entire, ciliate proximally, trichomes to 0.7 mm, surfaces sparsely pubescent, trichomes subsessile to short-stalked, 2–5-rayed, 0.1–0.4 mm. Cauline leaves: 5–10, rarely concealing stem proximally; blade auricles 0.5–2 mm, surfaces of distalmost leaves glabrous. Racemes 5–16-flowered, usually unbranched. Fruiting pedicels divaricate-ascending, straight, 4–10 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals purple, 6–8 × 1.5–2 mm, glabrous; pollen spheroid. Fruits divaricate-ascending, not appressed to rachis, not secund, straight, edges somewhat undulate (not parallel), 4–6.5(–7.6) cm × 2.5–3.5 mm; valves glabrous; ovules 24–54 per ovary; style 0.2–0.8 mm. Seeds uniseriate, 2.5–3.2 × 1.8–2.5 mm; wing distal, 0.3–1 mm wide.
Phenology: Flowering Jul–Aug.
Habitat: Rocky places in open conifer forests
Elevation: 1800-2000 m
Discussion
Of conservation concern.
Plants assigned to Boechera rigidissima appear to represent a series of apomictic hybrids, possibly involving B. stricta and B. suffrutescens. The two varieties recognized by Rollins are well isolated geographically (in Trinity County, California, and Washoe County, Nevada, respectively) and show enough morphological divergence to suggest that they represent distinct origins, if not different combinations of parental genomes.
Selected References
None.