Plant Wiki

The open plant encyclopedia

Know any plant.
Grow it well.

Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.

  • 13,000+plants with full pages
  • 365,000+plant species worldwide
  • 220+countries covered

Common in

See all

The plants people record most in your country, and ones that grow there wild.

What do you want to do?

Popular plants

Browse all plants

See them in 3D

All plants in 3D

Browse plants

Filter by what you want to do, shape, origin, country, care and safety.

Plant Wiki › Browse plants

Howell's lousewort

Pedicularis howellii

Also called Howell Lousewort

Howell's lousewort is a rare perennial wildflower from the Siskiyou Mountains of southern Oregon and northern California, growing on forest edges. It is a hemiparasite that draws some nutrients from the roots of neighbouring plants, so it is seldom grown in gardens.

Family
Orobanchaceae (Orobanch family)
Grows as
Perennial
Light
Part shade
Water
Keep the soil moist during the growing season and avoid drying out.
Soil
Well-drained, gritty, slightly acidic soil with leaf litter; mountain forest conditions.
Temperature
Cool to mild climates; tolerates cold winters, protect from prolonged heat above 30 °C.
How easy
Hard
Native range
S. Oregon to N. California
Climate
subalpine or subarctic

About

Pedicularis howellii is an uncommon species of flowering plant in the family Orobanchaceae known by the common name Howell's lousewort. It is endemic to the Siskiyou Mountains of the Klamath Range in southern Oregon and northern California, where it grows on the edges of coniferous forests. This is a perennial herb producing one or more stems up to 45 centimetres (18 in) tall from a long caudex. The leaves are up to 20 centimetres (8 in) long, lance-shaped, and divided into many toothed oval lobes; those higher on the stem may be unlobed. The basal leaves fall away early. The inflorescence is a small raceme of flowers occupying the top of the stem. Each white to light purple flower is up to one centimetre (2⁄5 in) long and is sickle-shaped, with a curved beak-like upper lip and a three-lobed lower lip which may be tucked into the hairy mass of sepals.

Other Pedicularis plants

Pedicularis asplenifolia · Little elephantshead · Pedicularis bhutanomuscoides · Bracted lousewort · Pedicularis cacuminidenta · Pedicularis caeruleoalbescens · Canadian lousewort · Dwarf lousewort · Coiled lousewort · Arctic Hairy Lousewort · Indian warrior · Pedicularis dhurensis

Text excerpted from the Wikipedia article Pedicularis howellii by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

Credits & terms

Identify a plant

Point at a leaf or flower and snap. One plant in frame works best.

Your photo
Starting camera…