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Phacelia affinis - limestone phacelia

Scientific Family
Hydrophyllaceae
Other common names
caterpillar weed
limestone scorpionweed
purplebell phacelia
Plant type
Forbs and Subshrubs
Origin
Native
Lifecycle
Annual
Height
2 to 12 inches
Riparian
Yes

Erect plant with deeply lobed simple leaves or sometimes divided into several lobed leaflets.

Erect stems, few branches; flower spikes surpassing leaves, petals slightly exceed calyx (leafy whorl of sepals), stamens and style do not exceed the petals; leaf blades narrowly oblong, pinnatifid to pinnately lobed.

Habitat

Open, sandy or gravelly soil in desert mountains and washes, chaparral and pinyon-juniper communities.

Plant Community
Desert Scrub
Interior Chaparral
Pinyon Juniper Woodlands
Riparian
Low elevation
2000
High elevation
4000

Flower Characteristics

The inflorescence is a one-sided curving or coiling cyme (flower cluster with a central terminal flower that develops first, other flowers develop later) of many tiny white to pale lavender bell-shaped flowers with yellowish throats.

Flower color
Yellow, white to light purple
Flower shape
Regular
Tubular
No
First bloom month
March
Last bloom month
June
Flower clusters
Elongated

Leaf and Stem Characteristics

The leaves are oblong in shape and are generally either deeply lobed or divided into several lobed leaflets. Herbage with spreading and glandular hairs.

Leaf type
Simple
Leaf color
Green
Leaf shape
Pinnatifid
Leaf margin
Lobed
Leaf attachment
Alternate
Leaves clasp
No
Leaf hairs
Leaves & stems
Spines
No

Fruit and Seed Characteristics

The fruit is a capsule about 1/4 inch long containing up to 30 seeds.

Fruit type
Capsule

Brownish seeds, oblong to spheric with 5 to 8 cross furrows.