Micranthes integrifolia, commonly known as whole-leaf saxifrage or swamp saxifrage is a perennial herb in the Saxifragaceae family.
- Saxifraga integrifolia
Kingdom: Plantae – Plants
Subkingdom: Tracheobionta – Vascular plants
Superdivision: Spermatophyta – Seed plants
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Family: Saxifragaceae – Saxifrage family
Genus: Micranthjes – saxifrage
Species: Micranthes integrifolia Hook. – wholeleaf saxifrage
A somewhat hairy perennial, the leafless flowering stems usually growing singly from a rhizome, reaching 10-30 cm in height. Leaves form a basal rosette with no cauline leaves. The blades are 2-5 cm long, narrowly rhombic to rhombic-ovate, narrowed gradually to short, broad petioles. Prominent marginal hairs line the leaves and are rusty-woolly on the lower surface.
The inflorescence is a short, compact panicle, subtended by a leafy, rusty-woolly bracts. The calyx is broadly conic, the 5 lobes oblong-lanceolate, 1-2 mm. long and reflexed. Individual flowers have 5 white, obovate petals, 1.5-3 mm. long, at least half as broad as long. Stamens number 10 and are short, awl-shaped.
Late March - July
West side of the Cascades, British Columbia to Lincoln County, Oregon, and in the Columbia River Gorge
Prairies, grassy slopes and vernally moist areas, sea level to subalpine
used ornamentally in rock gardens
Can be propagated by seed, division or cuttings. Seed should be planted in winter and barely covered. Germination takes place in 1 to 3 months at 16-21°C Division should be done after flowering. Cuttings in should be taken in late summer.
References & Notes
- http://biology.burke.washington.edu/herbarium/imagecollection.php?Genus=Saxifraga&Species=integrifolia Burke Museum University of Washington
- http://www.kadel.cz/flora/e/kvCard.asp-Id=5519.htm Rock Garden Plant Database
Average Measurement: 0.8 x 0.4 x 0.3
Measurement Range: L: 0.6 – 0.8, W: 0.2 – 0.5, D: 0.2 – 0.4
Shape: Seed narrowed at hilum and opposite apex, forming points. Middle between hilum and opposite apex rounded. Hilum is puckered.
Color: Seeds golden brown, and slightly darker at hilum.
Surface: Seeds bumpy and longitudinally ridged. Seeds are slightly lustrous.