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Federal
Status:
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Endangered |
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Date
Listed:
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62
FR 689; January 6, 1997. |
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Description:
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Herbaceous,
semi-aquatic, perrenial plant with slender, erect leaves
that grow from creeping rhizomes. The leaves are cylindrical,
hollow, and have septa (thin partitions) at regular intervals.
The yellow-green or bright green leaves are 1 -3 mm in
diameter and 3 - 5 cm tall (usually). Three -ten small
flowers are born on a short umbel. |
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Population:
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Largest
area currently (1995) available for recovery is San Pedro
River between Hereford and Fairbank. |
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Range:
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U.S.A.
(AZ), Mexico15 sites in Santa Cruz and Cochise Counties,
AZ and Sonora, Mex. San Pedro River, Santa Cruz R, Rio
Yaqui, and Rio Sonora between 1, 148 and 2,133 m. |
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Habitat:
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Cienega-mid
elevation wetland communities often surrounded by relatively
arid environments; associated with permanent perrenial
streams. Species also exists along the banks of streams
and river main channels, as well as in backwaters, side
channels, and nearby springs. |
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Behavior:
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After
a flood, lilaeopsis can rapidly expand its population
and occupy disturbed habitat until interspecific competition
exceeds its tolerance. This "expansion and contraction"
appears to depend on the presence of "refugia" where the
species can escape the effects of scouring floods. |
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Life
Cycle:
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The
fruits are globulose, 1.5 - 2 mm in diameter and usually
longer than wide. Huachuca water umbel reproduces sexually
and from rhizomes it reproduces asexually. Asexual reproduction
is the main mode of reproduction. |
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Threats:
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Destruction,
modification, or curtailment of habitat which includes
wetland degredation and loss, groundwater pumping and
growing water demand, livestock grazing (trampling by
cattle), wood cutting, mining, fire supression, water
diversion, dredging, rural and urban development, and
recreation. Other threats include introduction of non-native
plants such as Bermuda Grass and Water Cress, and Beaver
elimination. |
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Notes
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Also
called "Cienega False-Rush". Family: Umbelliferae. |
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