Asteraceae (Crepis)

Protocol Information for:

Label_title:
Crepis (nana)

Family Names:

Family Scientific Name:
Asteraceae

Family Common Name:
Sunflower family

Scientific Names:

Genus:
Crepis

Species:
nana

Scientific Classification:

Scientific SubSpecies:

Species Authority:
Rich.

Scientific SubAuthority:

Authors:

Common Synonym:

Genus:

Species:

Synonym Classification:

Synonym SubSpecies:

Species Authority:

Synonym SubAuthority:

Other Information:

Common Name:
Dwarf hawksbeard

Species Code:
CRENAN

Ecotype:
Alpine slope, southeastern B.C.

General Distribution:
C. nana is a dwarf alpine to subalpine species that occupies talus and scree slopes throughout western North America and northern Asia. It inhabits talus and scree slopes above treeline.

Known Invasiveness:

Propagation Goal:
plants

Propagation Method:
seed

Product Type:
Container (plug)

Stock Type:
160 ml conetainers

Grow Time:
9 Months

Target Specifications:
Height: 2 cm, 10 to 12 true leaves
Caliper: n/a
Root System: firm plug in conetainer

Propagation Collection:
Seeds are hand collected in late August when achenes turn grey and are easily removed from the disc. Seeds are collected in paper envelopes and kept in a well ventilate drying shed prior to cleaning.

Propagation Processing/Propagule Characteristics:
Seeds are hand cleaned.
Seed longevity is unknown.
Seed dormancy is classified as non dormant.
Seeds/Kg: 1,200,000 /kg approx.
% Purity: 100%
% Germination:55%

Pre-Planting Propagule Treatments:
Fresh seeds were sown in the outdoor nursery and subjected to a 5 month winter stratification. Germination occurs in late May when daytime temperatures reach 22C or higher.

Growing Area Preparation / Annual Practices for Perennial Crops:
Outdoor nursery growing facility.
Sowing Method: Direct Sowing. Seeds are lightly covered with medium.
This species requires a well aerated medium and careful irrigation practices during germination and growth.
Growingmedum used is 70% milled sphagnum peat, perlite, and vermiculite and 30%perlite with Osmocote controlled release fertilizer (13N:13P2O5:13K2O; 8 to 9 month release rate at 21C) and Micromax fertilizer (12%S, 0.1%B, 0.5%Cu, 12%Fe, 2.5%Mn, 0.05%Mo, 1%Zn) at the rate of 1 gram of Osmocote and 0.20 gram of Micromax per 172 ml conetainer. Conetainers are filled and sown in late fall and irrigated thoroughly prior to winter stratification.

Establishment Phase:
Medium is kept slightly moist during germination. Initial germination appeared uniform and occurred following 2 weeks of temperatures at 22C or above.

Length of Establishment Phase:
4 weeks

Active Growth Phase:
Root and shoot development occurs rapidly following germination. Plants were fertilized with 13-13-13 liquid NPK fertilizerat 100 ppm during the growing season. Careful attention should be made to irrigation as this species is susceptible to overwatering.

Length of Active Growth Phase:
12 weeks

Hardening Phase:
Irrigation is gradually reduced in September and October. Plants are leached with clear water and fertilized with 10-20-20 liquid NPK fertilizer at 200 ppm once before winterization.

Length of Hardening Phase:
4 weeks

Harvesting, Storage and Shipping:
Total Time to Harvest: 9 months
Harvest Date: August
Storage Conditions: Overwinter in outdoor nursery under insulating foam cover and snow.

Length of Storage:
5 months

Guidelines for Outplanting / Performance on Typical Sites:

Other Comments:
There are 2 subspecies; subspecies nana, the widespread typical phase and subspecies ramosa, which occurs in the southern part of the range of this species.

References:
Flora of the Pacific Northwest, Hitchcock and Cronquist, 7th edition, University of Washington Press, 1973.

Seeding Rate Statistics for Native and Introduced Species, Hassell, Wendel, U.S.D.I. and U.S.D.A., April 1996.

Seeds: Ecology, Biogeography, and Evolution of Dormancy and Germination, Baskin and Baskin, Academic Press, 1998.

Seed Germination Theory and Practice, Deno, Norman, Penn State University, 1993.

Glacier National Park Native Plant Nursery Propagation Records, unpublished.

Citation:
Luna, Tara; Evans, Jeff; Wick, Dale. 2008. Propagation protocol for production of Container (plug) Crepis nana Rich. plants 160 ml conetainers; USDI NPS - Glacier National Park West Glacier, Montana. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/06/22). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.

Personal tools