Floral Morphology and Anatomy of Glycosmis (Rutaceae) in China and Their Systematic Implications

The floral anatomical morphology of Glycosmis (Rutaceae) including nine species and eleven samples from China,was studied by using paraffin section and microdissection.Results showed that: the projected appendage and oil glands were found at the tip of the anther and there were one to a few oil glands on the back of the anther in many species,except one species (G.cochinchinensis) with sparse long hairs; the gynophore was divided into sub-sphaeroidal,cushion-like and elongated types based on the swollen degree;the shape of the ovary was sub-spheroidicity and slightly swollen cylindricity;the outer wall of the ovary was smooth,with salient oil glands or with irregular tubercles;the number of locule was four (three) or five;the shape of style was terete or attenuately columnar;characters of stigma were thicke-ned slightly or non-obvious;the style was persistent in most species,except G.esquirolii.It was concluded that the anatomical morphology of the flowers was characterized with high diversity between species in Glycosmis.Therefore,the floral morphology and anatomical features of Glycosmis could be used as evidence for inter- and intra-specific taxonomy and showed great systematic value.