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Arisaema triphyllum subsp. triphyllum

Arisaema triphyllum subsp. triphyllum (L.) Schott   (redirected from: Arisaema triphyllum var. triphyllum )
Family: Araceae
Jack in the pulpit
[Arisaema triphyllum var. triphyllum]
Arisaema triphyllum subsp. triphyllum image
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The Morton Arboretum
Perennial herb 15 cm - 0.9 m tall Leaves: usually two, long-stalked, with three leaflets (rarely five). The leaflets are more or less stalkless, to 30 cm long and 20 cm wide, with the terminal leaflet elliptic to broadly egg-shaped and the lateral leaflets usually asymmetrical and sometimes lobed or divided. Lower leaf surface covered with a whitish waxy coating (glaucous). Inflorescence: of many tiny flowers borne tightly clustered on the bottom half of a spike with a very fleshy axis (spadix), with male flowers above female flowers. The spadix yellow, 3 - 9 cm long, and club-shaped (rarely cylindric) with a blunt tip. The leaf-like sheath (spathe) surrounding the inflorescence forms a green tube sometimes marked with purple stripes, having a rim 4.5 - 9 mm wide, and expanding near the tip to form a long tapering hood over the inflorescence. Fruit: a 6 - 15 mm long cluster of nearly spherical red berries, each with one to three seeds reaching 3 - 5 mm across.

Similar species: Arisaema triphyllum ssp. stewardsonii is distinguished from Arisaema triphyllum ssp. triphyllum by having a glossy lower leaf surface, a 1 -3 mm wide spathe rim, a green spathe hood with white or purple stripes, and a usually cylindric spadix tip. It is limited to swamps, floodplains and other moist areas, and its range in the Chicago Region appears to be limited to LaPorte County, Indiana.

Flowering: mid April to mid July

Habitat and ecology: Common in rich woodlands.

Occurence in the Chicago region: native

Etymology: Arisaema comes from the Greek words aron, meaning Arum, and haima, meaning blood, referring to the blotchy red leaf color of some species. Triphyllum means three-leaved.

Author: The Morton Arboretum

Arisaema triphyllum subsp. triphyllum
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Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
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Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
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Arisaema triphyllum subsp. triphyllum image
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Arisaema triphyllum subsp. triphyllum image
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Arisaema triphyllum subsp. triphyllum image
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Arisaema triphyllum subsp. triphyllum image
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Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
Arisaema triphyllum subsp. triphyllum image
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