Ancestral taxa
Domain: Eukaryota  [Taxonomy; edit]
Kài: Plantae  [Taxonomy; edit]
Clade: Angiosperms  [Taxonomy; edit]
Clade: Eudicots  [Taxonomy; edit]
Clade: Core eudicots  [Taxonomy; edit]
Clade: Superasterids  [Taxonomy; edit]
Clade: Asterids  [Taxonomy; edit]
Clade: Lamiids  [Taxonomy; edit]
Bo̍k: Gentianales  [Taxonomy; edit]
Kho: Rubiaceae  [Taxonomy; edit]
A-kho: Rubioideae  [Taxonomy; edit]
Tribe: Spermacoceae  [Taxonomy; edit]
Sio̍k: Gomphocalyx  [Taxonomy; edit]

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Parent: Spermacoceae [Taxonomy; edit]
Rank: genus (displays as Sio̍k)
Link: Gomphocalyx
Extinct: no
Always displayed: yes (major rank)
Taxonomic references:
Parent's taxonomic references: