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Umbilicus rupestris

Navelwort · Wall Pennywort

Family CrassulaceaeGenus Umbilicus

Also published as Cotyledon umbilicus-veneris. You are in the right place.

Round dimpled leaves growing from the joints of a stone wall
LeafPhoto by sannseCC BY-SA 3.0

About the plant

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

Habit
succulent tuberous geophytePlants of the World Online
Flower
Greenish-pinkWikipedia
Native range
Albania, Algeria, Azores, Baleares, Bulgaria, Corse 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; Wikipedia — Wikipedia contributors; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

Worth knowing

  • Navelwort and Umbilicus both refer to its round leaves, which have a navel-like dip in the middle. It is not the pennywort of Asian medicine, which is the unrelated Centella asiatica. Wikipedia: Wall Pennywort

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1993

Difficulty Very high Rated by us, not by the source.

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

  1. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 21 days to germinate.

5% germination in 21 days.

5% in the third week, and that is the whole of Deno's result for the species.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, UmbilicusPublic domain
Show the original text
Umbilicus (Cupressaceae). U. rupestris germ. 70(5% in 3rd w) and none in 70L or 40-70D.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Umbilicus. 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

  1. Sow on the surface — do not cover

    Temperature: 70°F 21°C Light: light

    Nothing.

No stated waiting before sowing.

0% germination.

Nothing in light.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, UmbilicusPublic domain
Show the original text
Umbilicus (Cupressaceae). U. rupestris germ. 70(5% in 3rd w) and none in 70L or 40-70D.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Umbilicus. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

Protocol 3

DerivedN. C. Deno, 1993

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    Deno gives no length for this period; three months is his standard cycle.

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

    Nothing.

about 3 months from start to sowing.

0% germination.

Nothing after a cold period, sown in the dark.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, UmbilicusPublic domain
Show the original text
Umbilicus (Cupressaceae). U. rupestris germ. 70(5% in 3rd w) and none in 70L or 40-70D.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Umbilicus. Quoted exactly. Every value on this card comes from this record; 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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