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Phalocallis coelestis

Goblet Flower

Family IridaceaeGenus Phalocallis

A pale blue iris-like flower, its three broad falls marked yellow and white at the base, on a stem beside dark water.
FlowerJean-Michel Moullec from Vern sur Seiche (35, Bretagne), FranceCC BY 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
Pale lavender-blueRead from the photograph on this page
Native range
Argentina Northeast, Brazil SouthGBIF 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.

Worth knowing

  • Phalocallis, first described as a genus in 1839, has only this one species, which grows in Paraná State in southern Brazil and in northeastern Argentina. Wikipedia: Phalocallis

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around October 14, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on October 13, 2026.

  1. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  2. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  3. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

    2/9 germinated in this phase.

Steps after step 2 run on after germination.

about 3 months from start to step 2. Germination happens during step 2, in 84 days.

67% germination in 84 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cypella p. 36Public domain
Show the original text
Cypella (iridaceae). C. coelestis germ 70D-40(6/9 in 12th w)-70D(2/9 on 5th d) and 40(2/11 in 12th w)-70D-40-70D(2/11 in 2nd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cypella p. 36. 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, 1996

Difficulty High Rated by us, not by the source.

Start around January 11, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

  3. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

  4. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

    2/11 germinated in this phase.

Steps after step 1 run on after germination.

Germination happens during step 1, in 84 days.

18% germination in 84 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Cypella p. 36Public domain
Show the original text
Cypella (iridaceae). C. coelestis germ 70D-40(6/9 in 12th w)-70D(2/9 on 5th d) and 40(2/11 in 12th w)-70D-40-70D(2/11 in 2nd w).
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Cypella p. 36. 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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