Plant Image
Flower head

Yavapai County Native & Naturalized Plants

Hypericum scouleri - Scouler's St. Johnswort

Plant Form: Forb

Family: Clusiaceae

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Forb Plant Description

Origin: Native   Life Cycle: Perennial
General Desc: Slim and unobtrusive, often hidden in the lushness of wet areas, is most easily found when it is in bloom, for the flowers are very bright.
Identification notes: Leaf ovate to elliptic; sterile axillary branches generally < 1/8 inch; fruit 3-lobed; stem from taproot or rhizome.
Height: Up to 30 inches


Habitat Description: Most locations in mountainous areas; meadows, hillsides.
Plant Communities: Pinyon Juniper Woodland, Montane Conifer Forest, Riparian
Elevation: 4000 - 10000 feet

Flower Characteristics

Color: Yellow     Shape: Regular in round clusters     Tubular: N     Flowering Period: Jul - Aug
Description: Five petals are 1/2 inch long, and edges are lined with dark dots and sometimes tiny teeth; underneath are five pointed green sepals, about half as long. Flowers have dense clusters of 3 yellow styles and 75 to 100 yellow stamens at their center.

Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Round or oval     Leaf Margin: Smooth     Leaf Attachment: Opposite     Leaves Clasp: Y
Hairs: No     Spines: N
Leaf Description: The thick stems grow close together and branch freely, forming large clumps with dozens of flower heads. Ovate, opposite, 1-1/4 inches long, with a few pronounced axial veins and tiny black dots along the edges.

Fruit and Seed Characteristics

Fruit Type: Capsule
Fruit Notes: Fruit about 1/4 inch and 3-lobed.
Seed Notes: Seed less than 1/16 inch and brown.

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
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Last Updated: May 10, 2017  
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