Difference between revisions of "Amaranthus scleropoides"
Bot. Gaz. 19: 316. 1894.
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| − | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>annual, glabrous. <b>Stems</b> ascending to prostrate, erect when young, or main stems ± erect, branched proximally, 0.1–0.6 m. <b>Leaves</b>: petiole equaling or 1/2 as long as blade; blade elliptic, oblanceolate to lanceolate, (0.5–)1–3(–3.5) × 0.3–2 cm, base tapering, margins entire, plane to slightly undulate, apex broadly rounded or emarginate. <b>Inflorescences</b> axillary clusters borne from base to top, axes thickened and inflated, becoming indurate at maturity (only in A. scleropoides and A. crassipes). <b>Bracts</b> of pistillate flowers keeled (only A. scleropoides and A. crassipes have keeled bracts), ovate-triangular, minute. <b>Pistillate</b> flowers: tepals 5, narrowly spatulate, slightly clawed, with expanded blade, equal or subequal, (1.2–)1.5–2.5 mm, apex acute to apiculate; claws indurate at maturity; style branches spreading; stigmas 2–3. <b>Staminate</b> flowers intermixed with pistillate; tepals 5, membranaceous; stamens 3. <b>Utricles</b> orbicular to compressed-obovoid, 1.1–1.5 mm, shorter than tepals, smooth to tuberculate in distal 1/2, dehiscence regularly circumscissile. <b>Seeds</b> dark brownish black to black, compressed-ovoid to broadly lenticular, 0.9–1.1 mm diam., shiny.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>annual, glabrous. <b>Stems</b> ascending to prostrate, erect when young, or main stems ± erect, branched proximally, 0.1–0.6 m. <b>Leaves</b>: petiole equaling or 1/2 as long as blade; blade elliptic, oblanceolate to lanceolate, (0.5–)1–3(–3.5) × 0.3–2 cm, base tapering, margins entire, plane to slightly undulate, apex broadly rounded or emarginate. <b>Inflorescences</b> axillary clusters borne from base to top, axes thickened and inflated, becoming indurate at maturity (only in <i>A. scleropoides</i> and <i>A. crassipes</i>). <b>Bracts</b> of pistillate flowers keeled (only <i>A. scleropoides</i> and <i>A. crassipes</i> have keeled bracts), ovate-triangular, minute. <b>Pistillate</b> flowers: tepals 5, narrowly spatulate, slightly clawed, with expanded blade, equal or subequal, (1.2–)1.5–2.5 mm, apex acute to apiculate; claws indurate at maturity; style branches spreading; stigmas 2–3. <b>Staminate</b> flowers intermixed with pistillate; tepals 5, membranaceous; stamens 3. <b>Utricles</b> orbicular to compressed-obovoid, 1.1–1.5 mm, shorter than tepals, smooth to tuberculate in distal 1/2, dehiscence regularly circumscissile. <b>Seeds</b> dark brownish black to black, compressed-ovoid to broadly lenticular, 0.9–1.1 mm diam., shiny.</span><!-- |
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|elevation=0-1300 m | |elevation=0-1300 m | ||
|distribution=Okla.;Tex.;Mexico (Tamaulipas). | |distribution=Okla.;Tex.;Mexico (Tamaulipas). | ||
| − | |discussion=<p>A hybrid between Amaranthus crassipes and A. scleropoides was recently described as A. ×texensis Henrickson and reported from southeastern Texas (J. Henrickson 1999).</p> | + | |discussion=<p>A hybrid between <i>Amaranthus crassipes</i> and <i>A. scleropoides</i> was recently described as A. ×texensis Henrickson and reported from southeastern Texas (J. Henrickson 1999).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1894 | |publication year=1894 | ||
|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/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V4/V4_847.xml |
|genus=Amaranthus | |genus=Amaranthus | ||
|subgenus=Amaranthus subg. Albersia | |subgenus=Amaranthus subg. Albersia | ||
Revision as of 17:31, 18 September 2019
Plants annual, glabrous. Stems ascending to prostrate, erect when young, or main stems ± erect, branched proximally, 0.1–0.6 m. Leaves: petiole equaling or 1/2 as long as blade; blade elliptic, oblanceolate to lanceolate, (0.5–)1–3(–3.5) × 0.3–2 cm, base tapering, margins entire, plane to slightly undulate, apex broadly rounded or emarginate. Inflorescences axillary clusters borne from base to top, axes thickened and inflated, becoming indurate at maturity (only in A. scleropoides and A. crassipes). Bracts of pistillate flowers keeled (only A. scleropoides and A. crassipes have keeled bracts), ovate-triangular, minute. Pistillate flowers: tepals 5, narrowly spatulate, slightly clawed, with expanded blade, equal or subequal, (1.2–)1.5–2.5 mm, apex acute to apiculate; claws indurate at maturity; style branches spreading; stigmas 2–3. Staminate flowers intermixed with pistillate; tepals 5, membranaceous; stamens 3. Utricles orbicular to compressed-obovoid, 1.1–1.5 mm, shorter than tepals, smooth to tuberculate in distal 1/2, dehiscence regularly circumscissile. Seeds dark brownish black to black, compressed-ovoid to broadly lenticular, 0.9–1.1 mm diam., shiny.
Phenology: Flowering summer–fall.
Habitat: Seasonally wet, disturbed habitats
Elevation: 0-1300 m
Distribution
Okla., Tex., Mexico (Tamaulipas).
Discussion
A hybrid between Amaranthus crassipes and A. scleropoides was recently described as A. ×texensis Henrickson and reported from southeastern Texas (J. Henrickson 1999).
Selected References
None.