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Beardless Chinchweed

Pectis imberbis A. Gray

Comments

provided by eFloras
Pectis imberbis occurs in relatively small, widely separated populations. Overgrazing may be a factor in the scarcity of these plants. They are generally more than 25 cm before they begin to flower and may be unable to reproduce under grazing pressure.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 224, 229, 230 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Description

provided by eFloras
Perennials, 30–120 cm (caudices woody, 2–8+ mm diam.); herbage unscented. Stems erect, glabrous. Leaves narrowly linear, 10–50 × 1–2 mm (sometimes smaller, bractlike distally), margins with 0–1 pairs of setae, faces glabrous (abaxial dotted near each margin with a row of elliptic oil-glands ca. 0.3 mm). Heads borne singly or in open, cymiform arrays. Peduncles 10–80 mm. Involucres cylindric. Phyllaries distinct, linear-oblong, 5–9.5 × 1–1.5 mm (each dotted with 1–2 swollen, subapical oil-glands and a row of 2–3 linear, submarginal oil-glands on each side of midrib). Ray florets 5; corollas 6–11 mm (laminae often dotted near margins with inconspicuous oil-glands). Disc florets 4–7; corollas 3.7–6 mm (lobes 5, equal, each with 1 subterminal oil-gland). Cypselae 3.5–5 mm, puberulent (hair tips blunt); pappi of 1–3 stout awns 1–2 mm or coroniform. 2n = 24.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 224, 229, 230 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Comprehensive Description

provided by North American Flora
Pectis imberbis A. Gray, PI. Wright. 2: 70. 1853
A rigid perennial with woody root ; stem sulcate, 31 dm. high, branched, sparingly leafy • leaves thick, linear, 5-7 cm. long, with prominent midrib beneath, with or without 1 or 2 pairs of basal bristles; glands marginal; peduncles 2-4 cm. long; involucre subcylindric, 7-8 mm high, 3-4 mm broad; bracts 5 or 6, linear, blunt, soon involute, with linear glands; rayflowers 5 or 6; hgules yellow, fr-9 mm. long; disk-flowers 5 or 6; corollas 5-6 mm. long, each lobe with a dark gland; achenes puberulent, 5-6 mm. long; pappus various, usuallv partly of erect stout, subulate awns, and partly of small squamellae more or less toothed. '
Type locality: On the Sonoita, Sonora
Distribution: Arizona, Sonora. and Chihuahua.
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bibliographic citation
Per Axel Rydberg. 1916. (CARDUALES); CARDUACEAE; TAGETEAE, ANTHEMIDEAE. North American flora. vol 34(3). New York Botanical Garden, New York, NY
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Pectis imberbis

provided by wikipedia EN

Pectis imberbis is a species of flowering plant in the family Asteraceae. It is native to Chihuahua and Sonora in Mexico and Arizona in the United States.[2][3] It is known by the common names beardless chinchweed, beardless fetid-marigold, hierba de venado,[2] and tall chinchweed.[3]

This species is a perennial herb growing erect up to 1.2 meters tall from a woody caudex. The linear leaves are up to 5 centimeters long and only 1 or 2 millimeters wide. Flower heads are borne singly or in loose arrays. Each flower head has a cylindrical body lined with glandular phyllaries. It contains 5 yellow ray florets with a few disc florets at the center.[3] The florets may turn reddish or purple with age.[2] Flowering occurs after summer rainfall in August through October.[2]

This plant grows in many kinds of habitat, including woodland, grassland, and dry shrubland.[3] It can generally thrive in disturbed habitat,[2] but overgrazing may eliminate populations.[3]

References

  1. ^ NatureServe. 2014. Pectis imberbis. NatureServe Explorer.
  2. ^ a b c d e Pectis imberbis. Plant Abstracts. Arizona Game and Fish Department.
  3. ^ a b c d e Pectis imberbis. Flora of North America.

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Pectis imberbis: Brief Summary

provided by wikipedia EN

Pectis imberbis is a species of flowering plant in the family Asteraceae. It is native to Chihuahua and Sonora in Mexico and Arizona in the United States. It is known by the common names beardless chinchweed, beardless fetid-marigold, hierba de venado, and tall chinchweed.

This species is a perennial herb growing erect up to 1.2 meters tall from a woody caudex. The linear leaves are up to 5 centimeters long and only 1 or 2 millimeters wide. Flower heads are borne singly or in loose arrays. Each flower head has a cylindrical body lined with glandular phyllaries. It contains 5 yellow ray florets with a few disc florets at the center. The florets may turn reddish or purple with age. Flowering occurs after summer rainfall in August through October.

This plant grows in many kinds of habitat, including woodland, grassland, and dry shrubland. It can generally thrive in disturbed habitat, but overgrazing may eliminate populations.

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