Ash Creek Ivesia
(Ivesia paniculata )
Rosaceae

Photo Copyright Rick York and CNPS

Description: Low mat-forming perennial herb with a branched woody base. Leaves greenish, 5/8 to 1-3/4 inches (1.5-4.5 cm) long with 5-15 tightly overlapping 3-5 lobed leaflets. Sepals 5, triangular. Petals 5, linear, yellow, short, less than 1 mm long. Stamens 5 and 2-3 smooth and hairless pistils.

 Identifying Features:

1. Tightly overlapping leaflets.
2. 5 stamens and 2-3 pistils.

 Distribution: Lassen County.Within the public lands administered by the Alturas Field Office, known from fewer than 20 occurrences in Ash Valley and immediate area.

Habitat: On barren shallow volcanic soils in sagebrush-juniper to Jeffrey pine forest type from 5,000 to 6,000 feet (1524 to 1823 meters).

Flowering Period: June - September

Similar Plants: Grimy ivesia (Ivesia rhypara var. rhypara), but has 1-2 pistils, looser overlapping, densley canescent leaves, and occurs only in Nevada.

Status: BLM Sensitive, California Native Plant Society List 1B 

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Field Office: Alturas