Why are the seeds of this species difficult? The seeds have physical dormancy, which can be overcome by scarifying the seed coat to allow water uptake and encourage germination.
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This species has Orthodox seeds - dry to 15-20% eRH and store at -20ºC, or as cool as possible.
The seeds of this species are Physically Dormant.
Chip the seed coat with a scalpel before placing under germination conditions. Germinate on agar, germination paper or sand at 15, 20 or 25ºC, or under and alternating temperature regime of 30/15ºC (with an 8/16hr photoperiod). If this is not successful, dormancy may be overcome by using a sulphuric acid treatment for 60 minutes, a wet heat treatment (100ºC for 15 seconds) or a dry heat treatment (80ºC for 60 minutes).
The fruits (14-26 cm x 1.5-2 cm) are pendant, with 18-22 seeds per pod (6-10 mm long).
The seed pod is brown at maturity.
See images of this species at Tropical Forages.
Accepted name: Leucaena leucocephala (Lam.) de Wit.
Synonyms: Leucaena glauca Benth., Mimosa leucocephala Lam., Mimosa glauca L., Acacia glauca Willd.
Common name: white leadtree, wild tamarind
References and Links
- Baskin, C.C. and Baskin J.M. (1998). Seeds: ecology, biogeography, and evolution of dormancy and germination. Academic Press, USA.
- Food and Agriculture Organization of the United Nations and International Plant Genetic Resources Institute (1994). Genebank Standards. FAO/IPGRI, Rome, Italy.
- AFPD (African Flowering Plants Database) - Conservatoire et Jardin Botaniques de la Ville de Genève, Switzerland, and South African National Biodiversity Institute, Pretoria, RSA: Leucaena leucocephala.
- SID (Seed Information Database) - Royal Botanic Gardens, Kew, UK: Leucaena leucocephala.
- Tropical Forages - CSIRO, DPI&F(Qld), CIAT and ILRI, Brisbane, Australia: Leucaena leucocephala.
- Tropicos - Missouri Botanical Garden, USA: Leucaena leucocephala.