Description

Key Characters:

Growth Form: Annual herbs.

Stems: Stems prostrate, up to 4 dm long, branched, subglabrous, with a few long hairs on petiolules, lower surface of leaflets, and calyx.

Roots:

Leaves: Leaves compound. Alternate. Leaflets obovate–cuneate, 7–25 mm long, 5–23 mm wide. Apex rounded to truncate or emarginate. Surfaces glabrate. Margins dentate in upper ½. Leaflets with veins extending to margins. Petiolate. Stipules narrowly elliptic to narrowly ovate, laciniate, adnate to petiole.

Flowers: Flowers (1–)3–5(–8) in racemes, with an explosive tripping mechanism, bracts short. Flowers papilionaceous; bracteoles absent. Calyx campanulate, the tube short, 5-toothed, the teeth subequal. Corolla yellow, 3–4.5 mm long, deciduous after anthesis, distinct from staminal tube, keel obtuse, shorter than wings. Stamens 10; upper filament distinct, the other 9 connate into a tube, none of the filaments dilated. Ovary superior, sessile; style subulate, glabrous.

Fruit: Pods 4–8(–10) mm in diameter; exserted from calyx; reniform; spirally twisted in (1.5–)3–4(–6) turns; glabrous or subglabrous; transverse veins prominent; anastomosing; groove between submarginal and marginal vein wide; with nearly straight prickles 2–3 mm long; arising from the submarginal and marginal veins. Seeds several.

Ploidy: 2n = 14; 16

Habitat: Open; dry to occasionally mesic; disturbed areas such as pastures; roadsides; and vacant lots.

Elevation Range: 0–1,220 m.

SNo.	Scientific Name	Locality	Habitat	Basis of Record	Recorded By	Island	Source	Date
1	Medicago polymorpha	S.Kohala District, Nohonaohae cinder cone	Mowed roadside along pineapple field	UNKNOWN	C. R. Annable	Hawaii	HAPI	2/19/1999
2	Medicago polymorpha	Na Pali Coast, Honopu Beach, elevation near sea level		OBSERVATION	Curtis Daehler	Kauai	HAPI	10/18/2007
3	Medicago polymorpha	S.Kohala District, Nohonaohae cinder cone	Mowed roadside along pineapple field	UNKNOWN	C. R. Annable	Hawaii	HAPI	2/19/1999
4	Medicago polymorpha	Na Pali Coast, Honopu Beach, elevation near sea level		OBSERVATION	Curtis Daehler	Kauai	HAPI	10/18/2007

Medicago polymorpha

L. (1753)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Fabales Family: Fabaceae Genus: Medicago

bur clover

Description

Historical Distribution

Images

Synonyms (151)

Uses and Culture

USES

Natural History

Statewide Status

Island Status

Dispersal Agents

Pollinators

Specimens

Conservation Status

Bibliography

Occurrences

Medicago polymorpha

L. (1753)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Fabales Family: Fabaceae Genus: Medicago

bur clover

Description

Historical Distribution

Images

Synonyms (151)

Uses and Culture

USES

Natural History

Statewide Status

Island Status

Dispersal Agents

Pollinators

Specimens

Conservation Status

Bibliography

Occurrences

Added By Author on 9/16/19 Photo Source

Added By Author on 9/16/19 Photo Source

Added By Author on 9/16/19 Photo Source

Added By Author on 9/16/19 Photo Source

Added By Author on 9/16/19 Photo Source

Added By Author on 9/16/19 Photo Source

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