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Pennellianthus frutescens

Shrubby Beardtongue

Family PlantaginaceaeGenus Pennellianthus

Pale lilac tubular flowers with flared mouths, opening from gray hairy buds above pairs of glossy toothed leaves.
FlowerMiya.mCC BY-SA 3.0

About the plant

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

Habit
perennial or rhizomatous geophytePlants of the World Online
Flower
Pale lilacRead from the photograph on this page
Native range
Japan, Kamchatka, Khabarovsk, Kuril Is., Magadan, SakhalinGBIF 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

  • Pennellianthus was split from Penstemon and is named in honor of the American botanist Francis W. Pennell, best known for his work on the figwort family. It grows in Japan and the Russian Far East. Wikipedia: Pennellianthus

Protocol

DerivedN. C. Deno, 1993

Difficulty Low Rated by us, not by the source.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 13 days to germinate.

70% germination in 11–13 days.

Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Penstemon p. 187Public domain
Show the original text
Penstemon (Scrophulariaceae). Four types of germination were observed. Most Rocky Mountain species of a perennial nature germ. largely at 40 and often sowing at 70 was fatal or near fatal. A second group are short lived species that can flower the first year from seed typified by P. frutescens from Eastern Siberia is the one Penstemonthát is not native to America. It requires light for germination. Seed germ. 70L(70% in 11-13 d) and none in IOD. A prior 3 m at 40 or 3 m in 70D had no effect.
Seed Germination Theory and Practice, 2nd ed., Ch. 20, Penstemon p. 187. 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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