Trifolium cyathiferum — Details

Cup Clover learn more about names for this taxon

Overview

Distribution

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Trifolium cyathiferum Lindl.:
Canada (North America)
Mexico (Mesoamerica)
United States (North America)
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National Distribution

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Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Global Range: B.C. to CA, east to ID and w. MT. Peripheral.

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Physical Description

Morphology

Physical Description

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Annual, Herbs, Taproot present, Nodules present, Stems erect or ascending, Stems less than 1 m tall, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules green, triangulate to lanceolate or foliaceous, Stipules persistent, Stipules clasping stem at the base, Stipules adnate to petiole, Leaves compound, Leaves palmately 2-3 foliate, Leaflets dentate or denticulate, Leaflets 3, Leaves glabrous or nearly so, Inflorescences racemes, Inflorescences globose heads, capitate or subcapitate, Inflorescence axillary, Inflorescence terminal, Bracteoles present, Flowers zygomorphic, Calyx 5-lobed, Calyx gibbous, inflated, or spurred, Calyx glabrous, Calyx lobes exceeding or about equal to corolla, Petals separate, Corolla papilionaceous, Petals clawed, Petals ochroleucous, cream colored, Petals pinkish to rose, Banner petal narrow or oblanc eolate, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, Wing tips obtuse or rounded, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit indehiscent, Fruit oblong or ellipsoidal, Fruit orbicular to subglobose, Fruit or valves persistent on stem, Fruit enclosed in calyx, Fruit glabrous or glabrate, Fruit 1-seeded, Fruit 2-seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black, Seed surface mottled or patchy.
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Dr. David Bogler

Source: USDA NRCS PLANTS Database

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Diagnostic Description

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Distinguished from other Montana Trifolium by combining annual habit, flower heads subtended by a shallowly lobed involucre, and lower calyx teeth with 2-3 bristle-tips.

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Conservation

Conservation Status

National NatureServe Conservation Status

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Canada

Rounded National Status Rank: N1 - Critically Imperiled

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

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Rounded Global Status Rank: G4 - Apparently Secure

Reasons: Data primarily/exclusively from Munz, 1973, Calif. Flora

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Wikipedia

Trifolium cyathiferum

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Trifolium cyathiferum is a species of clover known by the common names cup clover and bowl clover. This species occurs in the western part of North America, its distribution extending from Alaska and northern Canada to California, Utah, and Montana. As an example occurrence, it is found in the California Coast Ranges in such places as Ring Mountain, California, where it is found in association with Tomcat clover.[1]

References

  1. ^ C. Michael Hogan. 2008. Ring Mountain, The Megalithic Portal, ed. Andy Burnham [1]
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