Geum macrophyllum Willd. Largeleaf avens, big-leaved avens
Big-leaved avens is native to North America. It is found on stream banks, at edges of woods, and in moist meadows and thickets. Plants: Perennials, with stout, hairy stems, 12-39″ (30-100 cm) tall. Leaves: Simple or compound, usually alternate, and toothed. Basal leaves are on long stalks. The terminal leaf is by far the largest, and it is heart or kidney-shaped, 2-4½″ (5-11 cm) in size. Stem leaves are few, usually attached directly to the stem (sessile), and composed of three parts. Pairs of “mini-leaves” called stipules appear at leaf axils, and these are larger than in other avens. Flowers: Flowers are ¼-½″ (6.3-12 mm) around, yellow, with sepals interspersed between petals in a starlike shape. Petals may have a dull point or notch at the tips. The sepals are shorter than the petals, and often curled back against the stem. There are many yellow-tipped stamens, and a greenish center of carpels. Flowers appear from May to early August. Fruits: A velcro-like ball of tiny hooks, 1/16-⅛″ (2.5-5 mm), reddish in color. These are closely similar (see also similar-appearing white-flowered varieties such as Geum canadense and Geum laciniatum): |
7/13/2015 · Mt. Mansfield, Stowe/Cambridge, Vermont · ≈ 10 × 7″ (25 × 16 cm) 7/13/2015 · Mt. Mansfield, Stowe/Cambridge, Vermont · ≈ 10 × 7″ (25 × 16 cm) |
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Geum aleppicum |
You are here Geum macrophyllum |
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Plant | Perennials, with stout, hairy stems, 12-39″ (30-100 cm) tall. | Perennials, with stout, hairy stems, 12-39″ (30-100 cm) tall. | |||||||||||||||||||||||||||
Flowers | In groups of 1-5 at the end of branching stems. Flowers are ½-1″ (1.3-2.5 cm) around, with 5 yellow petals that are round to oval, and may have a dull point or notch at the tip. Between the petals are five sharp-tipped sepals in the shape of a star, though these fold back as the flower ages. The sepals are equal to or shorter than the petals in length. Many yellow-tipped stamens surround a greenish center of many carpels. Flowers appear from May-July. | Flowers are ¼-½″ (6.3-12 mm) around, yellow, with sepals interspersed between petals in a starlike shape. Petals may have a dull point or notch at the tips. The sepals are shorter than the petals, and often curled back against the stem. There are many yellow-tipped stamens, and a greenish center of carpels. Flowers appear from May to early August. | |||||||||||||||||||||||||||
Leaves | Alternate, compound. Basal leaves are compound, while more upper leaves are variously shaped, roughly triangular or egg-shaped. Leaves are up to 4½″ (11 cm) × 3½″ (8.9 cm), coarsely toothed, and hairy. Stipules, or tiny leaflets, are often visible at leaf axils. | Simple or compound, usually alternate, and toothed. Basal leaves are on long stalks. The terminal leaf is by far the largest, and it is heart or kidney-shaped, 2-4½″ (5-11 cm) in size. Stem leaves are few, usually attached directly to the stem (sessile), and composed of three parts. Pairs of “mini-leaves” called stipules appear at leaf axils, and these are larger than in other avens. | |||||||||||||||||||||||||||
Fruit | A velcro-like ball of tiny hooks, 1/16-⅛″ (2.5-5 mm). | A velcro-like ball of tiny hooks, 1/16-⅛″ (2.5-5 mm), reddish in color. | |||||||||||||||||||||||||||
Range/ Zones |
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Habitats | Forests, woodlands, swamps, fields, roadsides, trail edges, and stream banks. Prefers moist soil, such as meadows, open woods, thickets, and swamps. | Otream banks, at edges of woods, and in moist meadows and thickets. | |||||||||||||||||||||||||||
Type | Wild | Wild | |||||||||||||||||||||||||||
Occurrence | Common | Common |
Online References:
Web.ewu.edu (Superb photos)
References:
Clemants, Steven; Gracie, Carol, Wildflowers in the Field and Forest, Oxford University Press, 2006, p. 174
Geum macrophyllum description by Thomas H. Kent, last updated 25 May 2020.
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