Difference between revisions of "Ceanothus prostratus"
Pl. Hartw., 302. 1849.
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| − | |distribution= | + | |distribution=Calif.;Idaho;Nev.;Oreg.;Wash. |
|discussion=<p>Varieties 2 (2 in the flora).</p><!-- | |discussion=<p>Varieties 2 (2 in the flora).</p><!-- | ||
--><p>Putative hybrids between <i>Ceanothus prostratus</i> and <i>C. velutinus </i>var.<i> velutinus</i>, named C. ×rugosus, have been reported from northeastern California (H. McMinn 1944). A rare putative hybrid between <i>C. prostratus</i> and <i>C. cordulatus</i> in the Lake Tahoe basin has been named C. ×serrulatus. Both C. ×rugosus and C. ×serrulatus are intersubgeneric hybrids. Formally named hybrids between <i>C. prostratus</i> and <i>C. cuneatus </i>var.<i> cuneatus</i> include C. ×flexilis and possibly C. ×connivens, but the latter could have <i>C. fresnensis</i> as one of the parents rather than <i>C. prostratus</i>.</p> | --><p>Putative hybrids between <i>Ceanothus prostratus</i> and <i>C. velutinus </i>var.<i> velutinus</i>, named C. ×rugosus, have been reported from northeastern California (H. McMinn 1944). A rare putative hybrid between <i>C. prostratus</i> and <i>C. cordulatus</i> in the Lake Tahoe basin has been named C. ×serrulatus. Both C. ×rugosus and C. ×serrulatus are intersubgeneric hybrids. Formally named hybrids between <i>C. prostratus</i> and <i>C. cuneatus </i>var.<i> cuneatus</i> include C. ×flexilis and possibly C. ×connivens, but the latter could have <i>C. fresnensis</i> as one of the parents rather than <i>C. prostratus</i>.</p> | ||
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|basionyms= | |basionyms= | ||
|family=Rhamnaceae | |family=Rhamnaceae | ||
| − | |distribution= | + | |distribution=Calif.;Idaho;Nev.;Oreg.;Wash. |
|reference=None | |reference=None | ||
|publication title=Pl. Hartw., | |publication title=Pl. Hartw., | ||
|publication year=1849 | |publication year=1849 | ||
|special status=Illustrated;Endemic | |special status=Illustrated;Endemic | ||
| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V12/V12_333.xml |
|genus=Ceanothus | |genus=Ceanothus | ||
|subgenus=Ceanothus subg. Cerastes | |subgenus=Ceanothus subg. Cerastes | ||
Revision as of 21:08, 27 May 2020
Shrubs, 0.1–0.3 m, matlike to moundlike. Stems prostrate, spreading, or ascending, rooting at distal nodes; branchlets reddish brown, ± flexible, puberulent, glabrescent. Leaves not fascicled, crowded, usually longer than internodes and obscuring them; petiole 1–3 mm; blade flat to ± cupped, elliptic to obovate, 6–30 × 4–16 mm, base cuneate, margins sometimes thick, not revolute, sometimes wavy, sharply dentate to spinose-dentate, teeth 3–9, apex rounded, abaxial surface pale green, glabrous except sparsely strigillose on veins, adaxial surface dark green, shiny, glabrate. Inflorescences axillary, 0.9–2 cm. Flowers: sepals, petals, and nectary pale to deep blue or purplish blue. Capsules 6–9 mm wide, lobed; valves smooth to rugulose, horns subapical, prominent, erect or spreading, rugose or not, intermediate ridges present. 2n = 24.
Distribution
Calif., Idaho, Nev., Oreg., Wash.
Discussion
Varieties 2 (2 in the flora).
Putative hybrids between Ceanothus prostratus and C. velutinus var. velutinus, named C. ×rugosus, have been reported from northeastern California (H. McMinn 1944). A rare putative hybrid between C. prostratus and C. cordulatus in the Lake Tahoe basin has been named C. ×serrulatus. Both C. ×rugosus and C. ×serrulatus are intersubgeneric hybrids. Formally named hybrids between C. prostratus and C. cuneatus var. cuneatus include C. ×flexilis and possibly C. ×connivens, but the latter could have C. fresnensis as one of the parents rather than C. prostratus.
Selected References
None.
Key
| 1 | Leaf blades flat, margins not wavy, teeth usually 3–5(–7); capsule horns erect. | Ceanothus prostratus var. prostratus |
| 1 | Leaf blades slightly folded lengthwise adaxially, margins ± wavy, teeth 5–9; capsule horns spreading. | Ceanothus prostratus var. occidentalis |