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Species
Helianthus ciliaris DC.
IUCN
NCBI
EOL Text
Perennials, 40–70 cm (rhizomatous or with creeping roots, often forming extensive colonies). Stems decumbent to ± erect, glabrous or glabrate (glaucous). Leaves cauline; mostly opposite; sessile; blades (often bluish green, 1- or 3-nerved) linear to lanceolate, 3–7.5 × 0.5–2.2 cm, bases ± cuneate, margins entire or serrate (usually ciliate and undulate), faces glabrous or glabrate to hispid. Heads 1–5. Peduncles (1–)3–13 cm. Involucres hemispheric, 12–25 mm diam. Phyllaries 16–19, ovate to lance-ovate, 3–8 × 2–3.5 mm, (margins ciliate) apices obtuse to acute, abaxial faces glabrate to ± strigose, not gland-dotted. Paleae 7–7.5 mm, subentire to 3-toothed (apices obtuse to acute, hairy, gland-dotted). Ray florets 10–18; laminae 8–9 mm. Disc florets 35+; corollas 4–6 mm, lobes reddish; anthers brownish red, appendages brownish red (style branches yellow). Cypselae 3–3.5 mm, glabrous; pappi of 2 aristate scales 1.2–1.5 mm. 2n = 68, 102.
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Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
Source | http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066875 |
United States
Rounded National Status Rank: N4 - Apparently Secure
Rounded Global Status Rank: G5 - Secure
Reasons: Data primarily/exclusively from Munz, 1973, Calif. Flora native Arizona to Texas
Helianthus ciliaris is a species of sunflower known by the common names Texas blueweed and yerba parda. It is native to much of the south-central United States and northern Mexico, but it can be found elsewhere in North America where it is an introduced species and often a noxious weed. It is weedy even in much of its native range, growing readily in disturbed areas, on cultivated land, and along the roadside. It grows well in moist areas such as drainage ditches. This is a perennial herb with distinctive blue-green foliage growing to heights of 40 to 70 centimeters. It has a tough, horizontally spreading root system which sprouts new plants at distances from the parent, and can also sprout after being fragmented, so plowing the plant under can actually help it spread. The leaves are variable in size, shape, and arrangement, but are generally lance-shaped and wavy with rough hairs along the edges. The inflorescence holds a mass of yellow-tipped red disc florets often surrounded by a fringe of several curling yellow ray florets, although some heads lack ray florets.
License | http://creativecommons.org/licenses/by-sa/3.0/ |
Rights holder/Author | Wikipedia |
Source | http://en.wikipedia.org/w/index.php?title=Helianthus_ciliaris&oldid=559107462 |
Helianthus ciliaris is considered a noxious weed in some states. It can propagate vegetatively from detached pieces of rhizome and spread aggressively, especially in cultivated fields. It has been noted to occur in Idaho and Washington, where control measures have been taken to eliminate it.
License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
Source | http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066875 |
United States
Origin: Native
Regularity: Regularly occurring
Currently: Present
Confidence: Confident
License | http://creativecommons.org/licenses/by-nc/3.0/ |
Rights holder/Author | NatureServe |
Source | http://explorer.natureserve.org/servlet/NatureServe?searchName=Helianthus+ciliaris |
Global Range: Native from Arizona to Texas (Munz 1959). Noxious weed in California (Hickman 1993). Eastern to westcentral and southern New Mexico in damp alkaline soils (Martin and Hutchins 1980). Widespread in Arizona often in saline soil, 1,000 to 6,500 feet; sometimes a troublesome weed (Kearney and Peebles 1951).
License | http://creativecommons.org/licenses/by-nc/3.0/ |
Rights holder/Author | NatureServe |
Source | http://explorer.natureserve.org/servlet/NatureServe?searchName=Helianthus+ciliaris |