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Arabis gracilipes - Flagstaff rockcress

Scientific Family
Brassicaceae
Synonyms
Boechera gracilipes
Plant type
Forbs and Subshrubs
Origin
Native
Lifecycle
Perennial
Similar species
Arabis fendleri
Height
2-1/2 to 3-1/2 feet
Riparian
No

Short-lived perennial; flower stems usually single, stout, lower part densely hairy, smooth above; leaves very numerous, crowded at base of stem in a rosette and closely overlapping (like shingles on a roof) well above the base, leaf blades lance-like.

Basal leaves often lack hairy margins, surfaces hairy with 2 or 3-rayed hairs; lower stems densely hairy; >20 1/4 to 1/2 inch stemmed leaves crowded on lower flower stems; flowers white to pinkish-purple; fruits not hairy, <3/4 inch long, bend downward.

Habitat

Basalt, limestone, and sandy soils in Ponderosa pine forests and pinyon-juniper woodlands. Found rarely up to 8000 feet.

Plant Community
Desert Scrub
Grasslands
Interior Chaparral
Montane Conifer Forest
Pinyon Juniper Woodlands
Low elevation
0
High elevation
6500

Flower Characteristics

Seedhead has 5 to 50 flowers on upper half of stem; ascending at anthesis (flowering period); sepals covered with short, soft hairs; petals white to pinkish-purple; valves smooth; pollen shaped in a narrow oval.

Flower color
White to pinkish-purple
Flower shape
Regular
Tubular
Yes
First bloom month
April
Last bloom month
June
Flower clusters
Elongated

Leaf and Stem Characteristics

Blades lance-like, <1 inch long, 1/4 to 1/2 inch wide; lower leaves stemmed, margins shallowly toothed, sometimes hairy at base, surfaces sparsely to densely hairy; upper leaves 30 to 65, not stemmed, margins smooth, outermost surface usually smooth.

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

Fruit and Seed Characteristics

Fruit hanging or drooping downward; arranged around main axis, not lying flat against the stem; curved; edges parallel; smooth; ovules 130 to 210 per ovary.

Fruit type
Pod

Seeds arranged in 2 rows.