Deno’s GardenMy Garden

Arisaema nepenthoides

Pitcher Cobra Lily · Himalayan Cobra Lily

Family AraceaeGenus Arisaema

A stem mottled like snakeskin carrying a whorl of broad ribbed leaves, with a green and purple streaked hood above them
The whole plantpeganum from Small Dole, EnglandCC BY-SA 2.0

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
tuberous geophytePlants of the World Online
Flower
Green, purpleRead from the photograph on this page
Native range
Assam, Bangladesh, China South-Central, East Himalaya, Myanmar, Nepal and elsewhereGBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

Start around February 15, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Temperature: 40°F 4°C

Germination happens during step 1, in 49 days.

100% germination in 49 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Arisaema p. 100Public domain
Show the original text
Arisaema (Araceae). The Asiatic species were received as dried berries in midwinter and germ. readily at 70 after WC for 7 d. The American species exhibited complex behavior. Germination is hypogeal in all species. The seed forms a corm and root system before sending up the single true leaf. This first true leaf is a single leaflet in A. nepenthioides germ. best in 40(2/2 in 7th w). The seedlings developed a radicle, root system, and a tuber within 4 w at 40 whereupon a shift to 70 led to development of a leaf (hypogeal) in 4 w. The seeds also germ. in 70D(2/3 in 5th w), but the leaf did not develop readily. Starting at 40 is recommended.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Arisaema p. 100. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

Protocol 2

DerivedN. C. Deno, 1993

Difficulty Moderate Rated by us, not by the source.

Start around March 1, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 35 days to germinate.

67% germination in 35 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Arisaema p. 100Public domain
Show the original text
Arisaema (Araceae). The Asiatic species were received as dried berries in midwinter and germ. readily at 70 after WC for 7 d. The American species exhibited complex behavior. Germination is hypogeal in all species. The seed forms a corm and root system before sending up the single true leaf. This first true leaf is a single leaflet in A. nepenthioides germ. best in 40(2/2 in 7th w). The seedlings developed a radicle, root system, and a tuber within 4 w at 40 whereupon a shift to 70 led to development of a leaf (hypogeal) in 4 w. The seeds also germ. in 70D(2/3 in 5th w), but the leaf did not develop readily. Starting at 40 is recommended.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Arisaema p. 100. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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