(Leucaena diversifolia, L. leucocephala, L. pallida X L. leucocephala)
The genus Leucaena includes several multipurpose tree species and interspecific hybrids that can withstand almost any type or frequency of pruning or coppicing. They are native to Mexico and Central America, and now abundant in the Philippines, West Africa, Nepal, Australia and Hawaii. Spanish sailing vessels reportedly introduced Leucaena to Asia four centuries ago. A total of thirteen species of Leucaena, mostly shrub species, are distributed within the New World tropics and subtropics.
‘K156’ was an accession of L. diversifolia from Veracruz, Mexico that was widely distributed by the University of Hawaii. It is very susceptible to psyllid damage
‘K784’ has proven to be the most psyllid resistant variety of L. diversifolia.
'K6' is a variety of L. leucocephala from Peru that exhibits excessive branching and much foliage. This variety will grow very tall unless pruned or coppiced and is usually used for forage.
'K67' is a variety of L. leucocephala bred for seed production, timber and fuelwood. It is a Hawaiian Giant type bred in El Salvador.
'K8' is a variety of L. leucocephala that is used mainly for timber. It is of the Hawaiian giant or Salvador type and can grow to 20 m height in five years.
‘KX2’ is a hybrid of L.pallida and L. leucocephala developed at the University of Hawaii. It has excellent psyllid resistance, cold tolerance, and is suited for elevations between sea level and 1000 m.
Reddish brown pods (when mature),from the UHDP Center in Northern Thailand. Red leucaena has been promoted by the Mindanao Baptist Rural Life Center for its tolerance of acidic soil and as a psyllid resistant alternative to L. leucocephala.
An excellent forage variety developed in Australia. A cross-breed between Salvador and Peru-type cultivars.