ABSTRACT. The pantropical Zingiberaceae are considered among the most threatened of the
monocotyledonous fl ora in the Philippines as many of its endemic species are now on the
brink of extinction. The fl ora includes the monotypic Leptosolena haenkei C. Presl listed
under the vulnerable (VU) category of the Threatened Plants of the Philippines and
Vanoverberghia sepulchrei Merr., which is under the other threatened species (OTS) category.
This study examined the morphoanatomical features of these two species and produced
a vegetative propagation scheme by determining the viability of the rhizome explants using
1-naphthalene-acetic acid (NAA) and n-2-furanylmethyl-1H-1-purine-6-amine (Kinetin) as
plant growth hormones. They were treated with different concentrations and combinations
of NAA and Kinetin. All treatments induced the viability of the rhizome explants. The results
revealed that low concentration produced more viable and fairly viable rhizome explants
than high concentration of NAA or Kinetin. Also, L. haenkei is said to be more viable to
V. sepulchrei in all of the eight treatments, X2 (2, N = 160) = 22.71, p < 0.05, and this is
because of many factors such as phenotypic variations among the two gingers and
microclimatic factors