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Loganiaceae R. Brown ex Martius. Strychnine Family.

Key to Loganiaceae

As here rather narrowly interpreted, Loganiaceae consists of about 15-16 genera and about 400-460 species, herbs, shrubs, and trees, of tropical, subtropical, and warm temperate areas of the Old and New Worlds (Mathews 2023; Struwe et al. 2018). Other genera in our area which have traditionally been considered components of the Loganiaceae now are clearly better placed in the small families Tetrachondraceae (Polypremum), Gelsemiaceae (Gelsemium), and Scrophulariaceae (Buddleja), more closely related to other families (such as Rubiaceae) than to Loganiaceae sensu stricto (Struwe, Albert, & Bremer 1994). The affinities of Spigelia appear to be with a small group of tropical and subtropical genera, the largest of which is Strychnos. Struwe, Albert, & Bremer (1994) treated this group as the family Strychnaceae, based on a cladistic analysis of data. A later, more thorough analysis suggested that Strychnaceae is best recombined with Loganiaceae (Backlund, Oxelman, & Bremer 2000).

Ref: Mathews (2023) In Flora of North America Editorial Committee (2023c); Rogers (1986); Struwe et al. (2018) In Kadereit & Bittrich (2018); Struwe, Albert, & Bremer (1994). Show full citations.

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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Scott Ward | Spigelia | Original Image ⭷
image of plant© Keith Bradley | Mitreola | Original Image ⭷
image of plant© Alan Cressler: Spigelia alabamensis, Big Goat Glade, Ketona Dolomite Glades, Bibb County, Alabama 4 by Alan Cressler | Spigelia source | Original Image ⭷

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