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Arabis platysperma

Amy Bartow
Seed and Plant Production Manager
USDA NRCS - Corvallis Plant Materials Center
3415 NE Granger Ave
Corvallis, Oregon 97330
(541) 757-4812 ext 103
(541) 757-4733 (fax)
amy.bartow@or.usda.gov
http://plant-materials.nrcs.usda.gov/orpmc
Family Scientific Name: Brassicaceae
Family Common Name: Mustard family
Scientific Name: Arabis platysperma Gray var. howellii (S. Wats.) Jepson
Common Name: Howell's pioneer rockcress
Species Code: ARPLH2
Ecotype: Seeds were collected from Crater Lake National Park.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Time To Grow: 0
Pre-Planting Treatments: Seeds were sown into cone-tainers filled with Sunshine # 1 (a soil-less peat-based media_ amended with micro-nutrients (Micromax) and a slow-release fertilizer (Osmocote 14-14-14.) Trays of conetainers were covered with polyethlyene bags and placed in a walk-in coller for 5,10, and 16 weeks. Within one week of being removed from a 5-week cold-moist stratification, seedlings emerged. They exhibited excellent vigor and germination was estimated at 96%. No significant difference in emergence or seedling vigor were noted between 5, 10 or 16 week stratified seeds. 2% germination was observed in control flats (no cold-moist stratification) after 4 weeks and seedlings were less vigorous than stratified ones.
Other Comments: Most plants flowered durring the first year, while still in containers.

Citation:

Bartow, Amy L. 2006. Propagation protocol for production of Container (plug) Arabis platysperma Gray var. howellii (S. Wats.) Jepson plants USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/03). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.