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Scientific Name: Sagina subulata
Pronunciation: suh-JYE-nuh sub-you-LAY-tuh
Common Name: Irish moss, Scotch moss , pearlwort
Family Name: Caryophyllaceae
Plant Type: Ground cover, Herbaceous perennial
Key ID Features: Low-growing prostrate perennial plant forming a thick, dense mat, stems < 10 cm long; leaves opposite, slender subulate (awl-shaped), to 1 cm long; flowers solitary, 4–5 mm wide, five white petals as long as the green sepals; capsules 2.5–3 mm long, seeds triangular shaped, 0.4–0.5 mm, brown and smooth.
Course(s): HORT 1155, Level 4 Apprenticeship

Habit: Dense, Spreading
Form: Creeping / Mat-like
Texture: Fine
Mature Size:
Height:< 0.1m
Spread:0.1 - 0.3m
Growth Rate:Slow
Origin: Europe
Hardiness Rating: Zone 3: (-40 to -34 C)
Exposure: Full sun
Soil/ Growing Medium: Rocky or gravelly or dry, Well-drained
Water Use: Low
Landscape Uses: Accent plant, Alpine, Container planting, Ground cover, Rock garden, Small garden/space
Additional Info: Google. Some images are of S. ‘Aurea’ (yellowish leaf colour).
Irish moss, Scotch moss , pearlwort
Leaf Morphology: Glossary
Form: Needle-like, Simple
Arrangement: Opposite
Texture/ Venation: Soft flexible
Surfaces: Glandular hairs
Colour in Fall: Green
Leaf(let) Terms:
Shapes: Linear
Apices: Acute
Margins: Entire

Inflorescence Type: Floriferous, Flowers solitary
Flower Morphology:Flowers perfect
Number of Petals:5
Corolla Shape:Rotate/stellate
Ovary Position:Superior
Colour (petals): Showy, White
Flower Scent: None
Flower Time at Peak: May, Jun, Jul

Fruit Type: Capsule
Fruit Colour: Brown, Green
Fruiting Time: Jul, Aug
Additional Info: Not showy

Bark or Stem Colour:

Propagation: Seed, Division - above ground parts
Plant Care:
Pest Susceptibility: Leaf scorch, Slugs or snails,
(FEA) Field lab Equipment Area
(HPZ) Horticulture PlaZa
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