Difference between revisions of "Holodiscus discolor var. dumosus"
Man. Bot. Rocky Mt., 79. 1885.
FNA>Volume Importer |
imported>Volume Importer |
||
| (4 intermediate revisions by 2 users not shown) | |||
| Line 11: | Line 11: | ||
|name=Spiraea discolor var. dumosa | |name=Spiraea discolor var. dumosa | ||
|authority=S. Watson | |authority=S. Watson | ||
| + | |rank=variety | ||
|publication_title=in W. H. Brewer et al., Bot. California | |publication_title=in W. H. Brewer et al., Bot. California | ||
|publication_place=1: 170. 1876 | |publication_place=1: 170. 1876 | ||
| Line 17: | Line 18: | ||
|name=Holodiscus dumosus | |name=Holodiscus dumosus | ||
|authority=(S. Watson) A. Heller | |authority=(S. Watson) A. Heller | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Rosaceae;Rosaceae subfam. Amygdaloideae;Rosaceae tribe Spiraeeae;Holodiscus;Holodiscus discolor;Holodiscus discolor var. dumosus | |hierarchy=Rosaceae;Rosaceae subfam. Amygdaloideae;Rosaceae tribe Spiraeeae;Holodiscus;Holodiscus discolor;Holodiscus discolor var. dumosus | ||
| Line 32: | Line 34: | ||
|elevation=1400–2800 m | |elevation=1400–2800 m | ||
|distribution=Ariz.;Colo.;Nev.;N.Mex.;Utah;Wyo.;Mexico (Chihuahua;Durango;San Luis Potosí). | |distribution=Ariz.;Colo.;Nev.;N.Mex.;Utah;Wyo.;Mexico (Chihuahua;Durango;San Luis Potosí). | ||
| − | |discussion=<p>Variety dumosus may be distinguished from < | + | |discussion=<p>Variety dumosus may be distinguished from <i></i>var.<i> discolor</i> by the following features: leaf blade decurrent on the petiole on long- and short-shoot leaves, short-shoot leaves rhombic to slightly ovate with a narrower length to width ratio (2.1–3.1:1), and maximal width of blade near mid blade or slightly below. The inflorescences are generally shorter and narrower than in <i></i>var.<i> discolor</i>. The shrub is generally shorter (1–2 m) than in <i></i>var.<i> discolor</i> (1–6 m) with a more open habit. Variety dumosus occupies more arid, rocky, fast-draining sites such as scree slopes and rock outcrops. Its primary distribution is in the central Rocky Mountains, centered on Colorado and Wyoming, with western extensions into central and southern Utah and central <i>Nevada</i>, and southern extensions to northern Arizona, New Mexico, and Chihuahua, Durango, and San Luis Potosí in Mexico. The western extensions and Wyoming populations show indications of possible hybridization with <i>Holodiscus microphyllus</i>. The southern populations show some hybridization with populations of <i></i>var.<i> discolor</i> that occupy higher elevations, in cooler, moister habitats. The long-shoot leaves of some plants of <i></i>var.<i> dumosus</i> can be very similar to those of <i></i>var.<i> discolor</i>, particularly when growing in moister sites.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 41: | Line 43: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Holodiscus discolor var. dumosus | name=Holodiscus discolor var. dumosus | ||
| − | |||
|authority=(S. Watson) Maximowicz ex J. M. Coulter | |authority=(S. Watson) Maximowicz ex J. M. Coulter | ||
|rank=variety | |rank=variety | ||
| Line 56: | Line 57: | ||
|publication year=1885 | |publication year=1885 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V9/V9_705.xml |
|subfamily=Rosaceae subfam. Amygdaloideae | |subfamily=Rosaceae subfam. Amygdaloideae | ||
|tribe=Rosaceae tribe Spiraeeae | |tribe=Rosaceae tribe Spiraeeae | ||
Latest revision as of 23:58, 5 November 2020
Stems 0.3–2 m. Leaves: long shoots (not predominant): petiole indistinct with decurrent blades; blade rhombic to slightly ovate, maximal width usually at mid blade, sometimes in proximal 1/4 of blade, 1–4(–6) × 0.5–2(–3) cm, base cuneate to decurrent, sometimes truncate and rounded, apex acute; short shoots (predominant): petiole obscured by decurrent blade; blade rhombic to ovate, maximal width approximately mid blade, 1–2(–3) × 0.5–1(–2) cm, base acute, decurrent, margins rarely with secondary teeth, apex acute. Inflorescences 3–12 × 3–8 cm, irregularly branched, loose. 2n = 36.
Phenology: Flowering Jun-–Aug.
Habitat: Dry habitats, mixed shrublands, ponderosa pine woodlands, rock outcrops, edges of talus slopes
Elevation: 1400–2800 m
Distribution
Ariz., Colo., Nev., N.Mex., Utah, Wyo., Mexico (Chihuahua, Durango, San Luis Potosí).
Discussion
Variety dumosus may be distinguished from var. discolor by the following features: leaf blade decurrent on the petiole on long- and short-shoot leaves, short-shoot leaves rhombic to slightly ovate with a narrower length to width ratio (2.1–3.1:1), and maximal width of blade near mid blade or slightly below. The inflorescences are generally shorter and narrower than in var. discolor. The shrub is generally shorter (1–2 m) than in var. discolor (1–6 m) with a more open habit. Variety dumosus occupies more arid, rocky, fast-draining sites such as scree slopes and rock outcrops. Its primary distribution is in the central Rocky Mountains, centered on Colorado and Wyoming, with western extensions into central and southern Utah and central Nevada, and southern extensions to northern Arizona, New Mexico, and Chihuahua, Durango, and San Luis Potosí in Mexico. The western extensions and Wyoming populations show indications of possible hybridization with Holodiscus microphyllus. The southern populations show some hybridization with populations of var. discolor that occupy higher elevations, in cooler, moister habitats. The long-shoot leaves of some plants of var. dumosus can be very similar to those of var. discolor, particularly when growing in moister sites.
Selected References
None.