Difference between revisions of "Helianthus laciniatus"
Mem. Amer. Acad. Arts, n. s. 4: 84. 1849.
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|name=Helianthus crenatus | |name=Helianthus crenatus | ||
|authority=R. C. Jackson | |authority=R. C. Jackson | ||
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|name=Helianthus heiseri | |name=Helianthus heiseri | ||
|authority=R. C. Jackson | |authority=R. C. Jackson | ||
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|elevation=1000–1200 m | |elevation=1000–1200 m | ||
|distribution=N.Mex.;Tex.;Mexico. | |distribution=N.Mex.;Tex.;Mexico. | ||
| − | |discussion=<p>Helianthus laciniatus reaches the northern extent of its range in New Mexico and Texas; it is relatively common in the Chihuahuan Desert areas of Mexico. It is similar to H. ciliaris; it usually has hairy stems as well as denser leaf indument that includes a greater number of subsessile, glandular hairs.</p> | + | |discussion=<p><i>Helianthus laciniatus</i> reaches the northern extent of its range in New Mexico and Texas; it is relatively common in the Chihuahuan Desert areas of Mexico. It is similar to <i>H. ciliaris</i>; it usually has hairy stems as well as denser leaf indument that includes a greater number of subsessile, glandular hairs.</p> |
|tables= | |tables= | ||
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|publication year=1849 | |publication year=1849 | ||
|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/V19-20-21/V21_411.xml |
|tribe=Asteraceae tribe Heliantheae | |tribe=Asteraceae tribe Heliantheae | ||
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | |subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae | ||
Revision as of 15:34, 18 September 2019
Perennials, 50–120(–200) cm. Stems erect, usually strigose or hispid to glabrate. Leaves cauline; opposite or alternate; sessile; blades (green or grayish, 1- or 3-nerved) lanceolate, 5–9 × 0.5–3.5 cm, bases ± cuneate, margins entire or irregularly toothed to lobed, faces strigose to strumose, gland-dotted (adaxial sometimes glaucous). Heads 1–9. Peduncles 4–13 cm. Involucres hemispheric, 10–24 mm diam. Phyllaries 16–21, lanceolate, 6–7.5 × 1.8–2.5 mm (often subequal), (margins ciliate) apices acute, abaxial faces hispidulous or strigose to glabrate, gland-dotted. Paleae 7–7.8 mm, entire or 3-toothed (apices obtuse to acute, hispid-ciliate to glabrate). Ray florets 14–20; laminae ca. 8–11 mm. Disc florets 40+; corollas 4.8–5.8 mm, lobes reddish; anthers purplish, appendages reddish (style branches yellow). Cypselae 2.7–3.5 mm, glabrate; pappi of 2(–3) aristate scales 1.4–2.5 mm. 2n = 34.
Phenology: Flowering summer–fall.
Habitat: Open, dry, alkaline soils
Elevation: 1000–1200 m
Distribution
N.Mex., Tex., Mexico.
Discussion
Helianthus laciniatus reaches the northern extent of its range in New Mexico and Texas; it is relatively common in the Chihuahuan Desert areas of Mexico. It is similar to H. ciliaris; it usually has hairy stems as well as denser leaf indument that includes a greater number of subsessile, glandular hairs.
Selected References
None.