Pogogyne tenuiflora | |
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A specimen of Pogogyne tenuiflora collected by Edward Palmer, at Royal Botanic Gardens, Kew. | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Lamiales |
Family: | Lamiaceae |
Genus: | Pogogyne |
Species: | †P. tenuiflora
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Binomial name | |
†Pogogyne tenuiflora | |
Synonyms[1] | |
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Pogogyne tenuiflora is an extinct species of annual plant in the mint family. Endemic to Guadalupe Island in the eastern Pacific, the Guadalupe mesa mint was only known from a single specimen collected by Edward Palmer in 1875. The species was described from Palmer's specimens by Asa Gray in 1876.[1][2]
Pogogyne tenuiflora is a small, aromatic annual herb, with inflorescences consisting of flowers in bracteate verticils forming dense terminal spikes. The corollas are blue-purple and tubular, with an erect, entire upper lip and a spreading 3-lobed lower lip. The corollas measure 10–14 mm (0.39–0.55 in) long. The lower pair of stamens measure 3–4 mm (0.12–0.16 in) long. The style is bearded for about 3 mm (0.12 in) below the branches.[3][4] The two sterile upper anthers place this species within the Hedeomoides subgenus of Pogogyne, which was recognized as its own genus by John Isaac Briquet in 1896.[5][6]
During his visit, Palmer only saw this species very rarely among the sagebrush habitat on the eastern side of the island.[7] By 1875, the feral goats, introduced years before by humans, had already started to devastate the environment of the island, leaving Palmer as the only person to document a number of species on the island that have also gone extinct, like the paleo-endemic monotypic olive relative Hesperelaea palmeri.[6][2]
Ira Wiggins thought P. tenuiflora to 'probably' be extinct in his 1980 flora of the Baja California peninsula (including Guadalupe Island).[4] Reid Moran considered P. tenuiflora to be 'undoubtedly' extinct in his 1996 treatise on the flora of the island.[6] The San Diego Natural History Museum considers this species as 'likely' extinct.[2] A 2013 phylogenetic study of the genus considers the species to be presumed extinct.[8]