Deno’s GardenMy Garden

Arctomecon californicum

Las Vegas Bearpoppy · California Bearpoppy · Golden Bearpoppy

Family PapaveraceaeGenus Arctomecon

Also published as Arctomecon californica. You are in the right place.

A rosette of thick silver-white woolly leaves on red desert sand, throwing up many stems of bright yellow poppies.
The whole plantStan ShebsCC BY-SA 3.0

About the plant

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

Flower
YellowRead from the photograph on this page

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

Source: Read from the photograph on this page — Deno's Garden.

Worth knowing

  • Pollinated by a specialist bee, the Mojave poppy bee. The species has declined sharply in recent decades: Nevada lists it as critically endangered and fully protected, and Arizona protects it too, though in 2024 the US Fish and Wildlife Service found a federal listing not warranted. Wikipedia: Arctomecon californica

This source reports two treatments. Both are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

  1. Sow outdoors and leave it

    Up in January.

No stated waiting before sowing.

29% germination.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Arctomecon p. 21Public domain
Show the original text
Arctomecon (Papaveraceae). A. californica germ. 70 GA-3{3/8 in 5th w), - OT(2/7 in Jan.), and none in 70D, 70L, or 40. OS needs to be tried. There was no further germination in the 70 GA-3 treatment after a shift to 40 for 3 m and a return to 70. Samples of A. californica and
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Arctomecon p. 21. 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
  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing.

0% germination.

Nothing germinated at 70.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Arctomecon p. 21Public domain
Show the original text
Arctomecon (Papaveraceae). A. californica germ. 70 GA-3{3/8 in 5th w), - OT(2/7 in Jan.), and none in 70D, 70L, or 40. OS needs to be tried. There was no further germination in the 70 GA-3 treatment after a shift to 40 for 3 m and a return to 70. Samples of A. californica and
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Arctomecon p. 21. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list.

Germination trials

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

Add to My Garden

View species page