Observations on Zizania texana (Texas Wildrice), an Endangered Species

Citation

Material Information

Title:
Observations on Zizania texana (Texas Wildrice), an Endangered Species
Series Title:
Bulletin of the Torrey Botanical Club
Creator:
Terrell, Edward E.
Emery, William H. P.
Beaty, Harold
Publisher:
Torrey Botanical Society
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Lakes ( local )
Biological Taxonomies ( local )
Stems ( local )
Spikelets ( local )
Seeds ( local )
River Water ( local )
Grasses ( local )
Leaves ( local )
Seeds Germinations ( local )
Streams ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
Zizania texana is restricted to 2.4 km of the upper San Marcos River in southcentral Texas. Physical and chemical characteristics of the San Marcos River are unusual, being characterized by alkaline or neutral pH and water temperature varying only ca 5 C annually. Taxonomic comparison of Z. texana with Z. aquatica and Z. palustris showed several important morphological differences; these were maintained in cultivation, although Z. texana lost its streaming, submersed habit. Zizania texana is geographically isolated from all other Zizania taxa by at least 640 km. Viable seed obtained in cultivation produced 500 new clones. Human disturbances have affected Z. texana adversely. Survival depends on continued water purity and abundant flow from Spring Lake, source of the river. We are attempting to preserve the habitat and to transplant cultivated clones to other localities in central Texas.
Original Version:
Bulletin of the Torrey Botanical Club, Vol. 105, no. 1 (1978-03).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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