Federal Status:
Endangered
Date Listed:
62 FR 689; January 6, 1997.
Description:
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.
Population:
Largest area currently (1995) available for recovery is San Pedro River between Hereford and Fairbank.
Range:
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.
Habitat:
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.
Behavior:
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.
Life Cycle:
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.
Threats:
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.
Notes
Also called "Cienega False-Rush". Family: Umbelliferae.

graphic Andrew Rodman ©2002
July 3, 2003
Go back