Plant Genera


Family Code: RUBIAC
Genus Code: HOUST
Genus CN: bluet
Genus Authority: L.
Genus Summary: The generic limits of Houstonia, Hedyotis, Oldenlandia, and Stenaria have been controversial, with much shuffling of generic configuration. It now appears that Houstonia should be recognized as a genus separate from Hedyotis and Oldenlandia, with Stenaria included in Houstonia (Guo et al. 2013; Wikström et al. 2013, and other references).
Genus Identification: Identification notes: In the key below, all leaf measurements and length/width ratios are based on median cauline leaves.
Genus References: Terrell (1959)=Z; Terrell (1991)=Y; Terrell (1996)=X; Rogers (1987)=Q; Ward (2004c)=V; Church & Taylor (2005); Church (2003); Turner (1995b)=U; Terrell (2001)=M; Rogers (2005); Terrell (2007); Guo et al. (2013); Wikström et al. (2013). Key adapted in part from the references.
Last Updated: 2019-11-29
Publish: 1

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