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Arisaema ringens

Arisaema ringens
Japanese cobra lily
Arisaema ringens
Huge leaves by late spring

Common name Japanese cobra lily
Family araceae
Life cycle perennial (Z5-9)
Flowers purple/greenish white (spring)
Size 24"
Light part-full shade
Cultural notes medium to moist soil
From seed germinate at room temperature
detailed seed-starting info below

Tuberous perennial from east Asia. Its glossy green leaves are divided into three leaflets, and emerge from a speckled purplish spear-shaped sheath in early spring. When they open up, it's almost like an explosion – not only do leaves and stems appear, but the flowers and spathes are also all wrapped inside, ready to expand rapidly. The hooded purple-and-green-striped flowers with glossy purple insides continue to develop through early summer, yielding red berries in mid-late summer. I've had a plant for years, probably a seedling from one of my earliest HPS/MAG seed exchanges, but misidentified it as a different Arisaema all along. Finally, now that I'm growing a fresh batch of A. ringens from seed, and I started looking up its characteristics, things clicked.

Japanese cobra lily
Sheathed leaves emerging in April 2012
Arisaema ringens
Two weeks later, everything bursts forth

We left this plant behind in our Pennsylvania garden (and wish it well); we don't grow it in Houston.

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Seed-starting details for this plant

  1. Seed from HPS/MAG '11/'12 exchange. Baggy 70F (95%G, 14-23d)

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