Last Addition: November 25, 2006
Each "thumbnail" image below is linked to a larger photograph.
Calycadenia hooveri is one of two species of Calycadenia known to be self-compatible. It is a rare species found on very barren soils of low foothills on the eastern side of the Central Valley from Calaveras to Mariposa counties, CA. The heads of this species are the smallest in the genus, commonly having only 1 ray and 1 disk flower. The chromosome number is n = 7. The species has been artificially hybridized with C. villosa and C. pauciflora (Race Tehama). Natural interspecific hybridization involving C. hooveri is unknown.
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Habitat at Camanche Reservoir site in Calaveras County. |
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Greenhouse grown plant of Mariposa County population. Plants in the field are not generally nearly this robust. |
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Heads from plants of Stanislas County population. Note the extremely small size and low number of florets per head and the single gland terminating the peduncular bracts. |
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Front view of head, note one ray and one disk floret. |
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Ray and disk florets of Stanislas County population. |