Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Localities documented in Tropicos sources

Cirsium hallii (A. Gray) M.E. Jones:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Physical Description

Morphology

Description

Biennials or monocarpic perennials, 20–350 cm; taprooted. Stems usually 1, erect, simple to openly branched in distal 1/2, ± villous with jointed trichomes, sometimes finely arachnoid, sometimes ± glabrate; branches 0–many, ascending. Leaves: blades oblong to elliptic or oblanceolate, 5–50 × 1–10 cm, plane to moderately undulate, coarsely dentate to deeply pinnatifid, lobes 5–10 well separated, linear, narrowly to broadly triangular, spinulose to spiny-dentate or shallowly lobed, main spines 3–10 mm, abaxial faces thinly to densely villous along major veins with septate trichomes, sometimes thinly arachnoid-tomentose, sometimes glabrescent, adaxial glabrous to sparsely villous or shaggy-tomentose along midveins with septate trichomes; basal often absent at flowering, spiny winged-petiolate or sessile; principal cauline well distributed, only gradually reduced, bases auriculate-clasping; distal moderately to strongly reduced, thin, often spinier than the proximal. Heads 1–many, erect, often crowded and ± sessile in tight clusters at stem tips, closely subtended by clusters of leafy bracts or not, collectively forming corymbiform or paniculiform arrays. Peduncles 0–5(–30) cm. Involucres narrowly ovoid to hemispheric or campanulate, 1.5–3.5 × 1.5–4 cm (including spines), loosely to densely arachnoid with fine, non-septate trichomes. Phyllaries in 4–8 series, subequal, green or often purplish, bodies short, appressed, abaxial faces without glutinous ridge, apices stiffly radiating to ascending, straight or flexuous, narrowly linear, plane to acicular, spines straight, slender, 1–10+ mm; outermost spiny-fringed or entire, mid entire or minutely serrulate; apices of inner straight, sometimes expanded and erose, flat. Corollas purple (pink or white), (15–)18–22(–33) mm, tubes 7–11 mm, throats (4–)5–8.5(–13) mm, lobes linear but not filiform, not knobbed at tips, (2–)4.5–7(–10) mm; style tips 3–4(–5) mm, conspicuously exserted beyond corolla lobes. Cypselae dark brown, 3.5–6.5 mm, apical collars not differentiated; pappi 9–19(–25) mm.
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Ecology

Habitat

Comments: Wet meadows, woods.

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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 81 to >300

Comments: Common within its range.

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N5 - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: N4 - Apparently Secure

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

Reasons: Species occurs in a wide elevational range from Oregon to southeastern Alaska, mostly west of the Cascades, but also east to Idaho. Locally common, (especially in British Columbia).

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Threats

Comments: No obvious threats.

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Wikipedia

Cirsium edule

Cirsium edule, the Edible Thistle, is a species of thistle in the genus Cirsium, native to western North America from southeastern Alaska south through British Columbia to Washington and Oregon, and locally inland to Idaho.

All the florets have similar form (Alpine Lakes Wilderness).

It is a tall herbaceous perennial plant, reaching 1-2 m tall. The leaves are very spiny, lobed, 10-30 cm long and 2-5 cm broad (smaller on the upper part of the flower stem). The inflorescence is 3-4 cm diameter, purple, with all the florets of similar form (no division into disc and ray florets). The seeds are 4-5 mm long, with a downy pappus which assists in wind dispersal. It is monocarpic, growing as a low rosette of leaves for a number of years, then sending up the tall flowering stem in spring, with the plant dying after seed maturation.

Edible Thistle is used by Native Americans for its edible roots and young shoots. The roots are sweet, but contain inulin, which gives some people digestive problems.

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Notes

Comments

The edible thistle has had a convoluted nomenclatural history. The labels on the type collection (BM) bear the following information: "Circium [sic] * edule" and "R. Mountains & plains of Columbia." When Nuttall published the name, he listed the range as "The plains of Oregon and the Blue Mountains." The type specimen closely resembles plants from western Oregon, but plants of Cirsium edule are not known to occur in the Blue Mountains. J. T. Howell (1943) noted that the name C. edule had long been in use for two distinctly different species, one with a long, slender corolla tube, short lobes, and a barely exserted style and the other with a stouter corolla with a shorter tube, longer lobes, and a long-exserted style. He applied the name C. edule to the species with the slender corolla, and took up the name C. macounii for the second species. After examining the type of C. edule, A. Cronquist (1953) pointed out that Howell had erred in applying that name to the short-styled species, and described the latter as C. brevistylum. Cronquist expressed doubt as to the collection locality of the type of C. edule, focusing on the Blue Mountains and not noting the duality of the location data on the specimen and in Nuttall’s publication. It is likely that the plants Nuttall observed in the Blue Mountains were C. brevistylum.

J. T. Howell (1960b) resurrected the name Cirsium hallii to apply to a group of Oregon thistles growing west of the Cascade Range, attributing to it a type locality of Salem, Oregon. Howell (1943) had noted that he had borrowed "the type" of C. hallii from the Gray Herbarium. This species had been described (as Cnicus hallii) by Gray based upon three syntypes (one each cited from California, Utah, and Oregon). The specimen examined by Howell was apparently the Oregon collection by [Elihu] Hall that Gray cited. The Utah and California specimens are different taxa. After examining photographs of the holotype of C. edule and the Oregon specimen of C. hallii, and various specimens collected in the area that Howell described as the range of C. hallii, I have concluded that C. hallii and C. edule are clearly conspecific.

Cirsium edule is a polymorphic species much in need of an in-depth field-based investigation. R. J. Moore and C. Frankton (1962) noted that in the northern part of its range, C. edule occurs mostly at elevations from 300 to over 2100 m. However, along the Oregon coast the species occurs on sea bluffs a few meters above the surf. Populations from montane sites are often rather different in appearance from those of lowland areas, and coastal plants differ from those of nearby more interior areas. Both montane and strictly coastal plants tend to be compact with heads tightly crowded and usually with very densely arachnoid involucres. Plants of non-montane interior sites tend to be taller and more openly branched. Plants of interior sites in southern Washington and Oregon have smaller heads with less densely arachnoid involucres than those farther to the north or along the seashore. The spiny tips of the phyllaries may be ascending or may radiate from the head forming a dense, spiny ball.

Hybridization may have played a role in the diversification of Cirsium edule. Hybrids between C. edule var. macounii and C. brevistylum in southern Canada have been named as C. ×vancouveriense R. J. Moore & C. Frankton. Cirsium edule and C. brevistylum overlap extensively in parts of their ranges and hybrids may occur throughout their area of sympatry. Some of the variation in the southern part of the range of C. edule may be a result of past introgression with various forms of C. remotifolium.

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