EINP Invasive Plant Species Look-Alikes Quiz

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Is this plant invasive or native?

Native, this is arrow-leaved coltsfoot! It’s invasive look-alike is great burdock.

Top photo: arrow-leaved coltsfoot (native):

Leaves: Arrow-shaped
Flowers: Small, white

Bottom photo: great burdock (invasive):

Leaves: Heart-shaped and wavy
Flowers: Purple-pink with burrs

<p>Native, this is arrow-leaved coltsfoot! It’s invasive look-alike is great burdock.</p><p>Top photo: arrow-leaved coltsfoot (native):</p><ul><li><p>Leaves: Arrow-shaped</p></li><li><p>Flowers: Small, white</p></li></ul><p>Bottom photo: great burdock (invasive):</p><ul><li><p>Leaves: Heart-shaped and wavy</p></li><li><p>Flowers: Purple-pink with burrs</p></li></ul><p></p>

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Which plant is invasive and what is it called?

The bottom photo is invasive—it’s creeping bellflower! Its native look-alike is native bluebells.

Top photo: bluebells (native):

Leaves: heart-shaped basal leaves and long, narrow leaves on the flowering stem
Flowers: only 1-3 flowers per stem

Bottom photo: creeping bellflower (invasive):

Leaves: heart-shaped
Flowers: dense on one side of the stem

<p>The bottom photo is invasive—it’s creeping bellflower! Its native look-alike is native bluebells. </p><p>Top photo: bluebells (native):</p><ul><li><p>Leaves: heart-shaped basal leaves and long, narrow leaves on the flowering stem</p></li><li><p>Flowers: only 1-3 flowers per stem</p></li></ul><p>Bottom photo: creeping bellflower (invasive):</p><ul><li><p>Leaves: heart-shaped</p></li><li><p>Flowers: dense on one side of the stem</p></li></ul><p></p><p></p>

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Which plant is invasive and what is it called?

The top photo is invasive—it’s caragana! Its native look-alike is prickly rose.

Top photo: caragana (invasive):

Leaves: entire margin
Flowers: yellow
Stem: small spines

Bottom photo: prickly rose (native):

Leaves: serrate margins
Flowers: pink
Stem: thorns

<p>The top photo is invasive—it’s caragana! Its native look-alike is prickly rose.</p><p>Top photo: caragana (invasive):</p><ul><li><p>Leaves: entire margin</p></li><li><p>Flowers: yellow</p></li><li><p>Stem: small spines</p></li></ul><p>Bottom photo: prickly rose (native):</p><ul><li><p>Leaves: serrate margins</p></li><li><p>Flowers: pink</p></li><li><p>Stem: thorns</p></li></ul><p></p>

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Is this plant invasive and what is it called?

Yes, this plant is invasive—it’s cicer milkvetch! Its native look-alike is American vetch.

Top photo: cicer milkvetch (invasive):

Flowers: cream/yellow
Tendrils: no

Bottom photo: prickly rose (native):

Flowers: purple
Tendrils: yes

<p>Yes, this plant is invasive—it’s cicer milkvetch! Its native look-alike is American vetch.</p><p>Top photo: cicer milkvetch (invasive):</p><ul><li><p>Flowers: cream/yellow</p></li><li><p>Tendrils: no</p></li></ul><p>Bottom photo: prickly rose (native):</p><ul><li><p>Flowers: purple</p></li><li><p>Tendrils: yes</p></li></ul><p></p>

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Is this plant invasive and what is it called?

Yes, this plant is invasive—it’s common tansy! Its native look-alike is dune tansy

Top photo: common tansy (invasive):

Leaves: “lace-like”
Height: up to 1.5 m

Bottom photo: dune tansy (native):

Leaves: “feathery”
Height: 20-60 cm

<p>Yes, this plant is invasive—it’s common tansy! Its native look-alike is dune tansy </p><p>Top photo: common tansy (invasive):</p><ul><li><p>Leaves: “lace-like”</p></li><li><p>Height: up to 1.5 m </p></li></ul><p>Bottom photo: dune tansy (native):</p><ul><li><p>Leaves: “feathery”</p></li><li><p>Height: 20-60 cm</p></li></ul><p></p>

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Which plant is invasive and what is it called?

The bottom photo is invasive—it’s false spirea! It’s native look-alike is red elderberry.

Top photo: red elderberry (native):

Berries: yes, red

Bottom photo: false spirea (invasive):

Berries: no

<p>The bottom photo is invasive—it’s false spirea! It’s native look-alike is red elderberry.</p><p>Top photo: red elderberry (native):</p><ul><li><p>Berries: yes, red</p></li></ul><p>Bottom photo: false spirea (invasive):</p><ul><li><p>Berries: no</p></li></ul><p></p>

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Which picture is reed canary grass?

The left picture is reed canary grass! It’s native look-alike is Canada bluejoint.

Top photo: reed canary grass (invasive):

Leaves: up to 20 mm wide

Bottom photo: Canada bluejoint (native):

Leaves: up to 10 mm wide

<p>The left picture is reed canary grass! It’s native look-alike is Canada bluejoint.</p><p>Top photo: reed canary grass (invasive):</p><ul><li><p>Leaves: up to 20 mm wide</p></li></ul><p>Bottom photo: Canada bluejoint (native):</p><ul><li><p>Leaves: up to 10 mm wide</p></li></ul><p></p>

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What are some key distinguishing features of the leafy spurge?

The leafy spurge is a unique plant! 2 heart-shaped leafy bracts surround clusters of yellow-green flowers that lack both petals and sepals. The leaves form an alternate arrangement. The leaves themselves are oblong, narrow, waxy and attach directly onto the stem. If cut, they release a poisonous milky sap known as latex.

<p>The leafy spurge is a unique plant! 2 heart-shaped leafy bracts surround clusters of yellow-green flowers that lack both petals and sepals. The leaves form an alternate arrangement. The leaves themselves are oblong, narrow, waxy and attach directly onto the stem. If cut, they release a poisonous milky sap known as latex. </p>

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While the oxeye daisy could be confused with the scentless chamomile, it has no clear native lookalikes… What features distinguish the oxeye daisy from the scentless chamomile?

In the oxeye daisy, the lower leaves are spoon-shaped with lobed or toothed edges and long leaf stalks; upper leaves are alternate, narrow and clasp the stem. However, the scentless chamomile, the leaves are alternate, very finely divided (carrot-like) and highly branched.