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Tetraneuris acaulis: Stemless Four-Nerve Daisy / Angelita Daisy

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Description
Form: Clump-forming herb.
Lifespan: Perennial.
Leaf retention: Evergreen but dies to ground in hard freezes.
Growth rate: Moderate.
Mature Size: 1' high and 3-5' wide.
Flowers: Daisy-like, yellow rays having squared tips with two notches, yellow to orange center, at terminal end of stem, fragrant.
Bloom: Sporadically, all year in regions without freezes.
Fruit: Hairy seed within dried flower head.
Leaves: Green, linear, surrounding base of plant, unpleasant odor when crushed.
Stems: No thorns. Unbranched, leafless flower stems.
Roots: Taproot makes transplanting difficult.
Wildlife: Attracts insects, sometimes butterflies. Rabbit and deer resistant.
Toxic / Danger: No.
Origin: Alberta, Saskatchewan, western United States minus Washington and Oregon, into Mexico.

Cultivation and Uses
USDA hardiness zones: 5b-10.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun.
Water after becoming established: Monthly. Accepts frequent watering in very well drained soil but root rot can occur if soil stays moist.
Soil: Well drained, dry, low in organic content, pH 6.1-7.8 (slightly acidic to slightly alkaline).
Mulch: Not necessary and may be detrimental when soil subjected to frequent watering. Best when inorganic.
Prune: Remove spent flower heads to improve appearance.
Litter: Low.
Propagation: Seed. Plant reseeds in landscape.
Uses: Ornamental, xeric garden.

Comments
Former scientific name: Hymenoxys acaulis. Five subspecies are recognized. The plant genus, Tetraneuris, is sometimes referred to as Bitterweed. Another common name is Perky Sue. The name stemless refers to the lack of a stem between the root crown and the leaves. The butterfly is a Fatal Metalmark.



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