Heart-leaf avens

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Heart-leaf avens leaf

Heart-leaf avens

Heart-leaf avens habit

Heart-leaf avens leaves

Heart-leaf avens leaves

Heart-leaf avens habit

Morphology

Stem

Ascending to erect, usually branched from base, pilose, sometimes sparsely so.

Leaves

Basal and cauline, alternate, simple, often with smaller leaflets intermixed with larger ones; stipules foliaceous; petiole present on basal and lower cauline leaves, absent on upper cauline leaves. Basal leaves 1.6 to 10.6 inches, surfaces glabrate to pilose; blade simple to pinnate; leaflets 3-11, margins crenate to serrate or lobed, terminal leaflet 1.2 to 3.2 inches long, .8 to 2.4 inches wide. Cauline leaves: stipules .3 to 1 inch; blade pinnate to 3-foliolate, .8 to 2.8 inches.

Inflorescence

Cymes, terminal, 3-13-flowered.

Flower

Pedicels glandular-pilose, glabrate in fruit; hypanthium saucer- to cup-shaped, .06 to .08 inch; sepals 5, reflexed, .04 to .12 inch; petals 5, yellow, oblong to elliptic, .04 to .08 inch; stamens numerous; receptacle hemispheric to cylindric; pistils numerous, distinct; basal portion of style persistent.

Fruit

Heads of aggregated achenes, .24 to .55 inch. Achene: stipe .12 to .28 inch, glabrous; body ovoid to fusiform, tapered distally to style, .08 to .12 inch; style .06 to .12 inch at maturity, nearly glabrous except for few septate-glandular hairs, tips hooked, distal segment deciduous, nearly glabrous except for short hairs; seeds many.

Ecology

Habitat

Floodplain, maple-basswood, and mesic oak-hickory woods, river and stream banks

Distribution

East 1/4 of Kansas

Additional Notes