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Hexalectris (crested coralroot) [1] is a genus of the family Orchidaceae, comprising 10 known species of fully myco-heterotrophic orchids. [2] These species are found in North America, with the center of diversity in northern Mexico. [3] None of the species are particularly common. [4]
Hexalectris spicata, the spiked crested coralroot, [2] is a terrestrial, myco-heterotrophic orchid lacking chlorophyll and subsisting entirely on nutrients obtained from mycorrhizal fungi in the soil. It is native to Arizona, New Mexico, Texas and Coahuila.
Hexalectris arizonica, the spiked crested coralroot or Arizona crested coralroot, is a terrestrial, myco-heterotrophic orchid lacking chlorophyll and subsisting entirely on nutrients obtained from mycorrhizal fungi in the soil. It is native to Arizona, New Mexico, Texas and Coahuila.
Hexalectris warnockii, the Texas crested coralroot, Texas purple-spike, is a myco-heterotrophic orchid found in the states of Texas and Arizona in the southwestern United States, and in the states of Coahuila and Baja California Sur in northern Mexico.
Hexalectris revoluta, the Chisos Mountain crested coralroot, [1] is a terrestrial, myco-heterotrophic orchid lacking chlorophyll and subsisting entirely on nutrients obtained from mycorrhizal fungi in the soil. It is closely related to H. colemanii; the two are regarded by some authors as varieties of the same species.
Hexalectris colemanii, or Coleman's crested coralroot, [2] is a terrestrial, myco-heterotrophic orchid lacking chlorophyll and subsisting entirely on nutrients obtained from mycorrhizal fungi in the soil. It is a very rare species endemic to southern Arizona, known from only three counties (Pima, Cochise and Santa Cruz).
Hexalectris grandiflora, the largeflower crested coralroot [2] or giant coral-root, is a species of orchid native to Mexico from Chihuahua south to Oaxaca, as well as to western and north-central Texas. It is a myco-heterotrophic species, lacking chlorophyll and subsisting entirely on nutrients obtained by fungi in the soil. [1] [3] [4] [5] [6]
Spiked crested coralroot is a common name for two plants which are sometimes considered to belong to the same species: Hexalectris arizonica; Hexalectris spicata