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###### Department of the Interior

###### Fish and Wildlife Service 

          - 50 CFR Part 17 
          - RIN 1018-AE87 

# AGENCY:

Fish and Wildlife Service, Interior. 

# ACTION:

Proposed rule; notice of reopening of comment period. 

# SUMMARY:

                        We, the Fish and Wildlife Service (Service), pursuant to the Endangered Species Act of 1973, as amended (Act), reopen the comment period on the proposal to list the plant                         *Gaura neomexicana*                         ssp.                         *coloradensis*                         (Colorado butterfly plant) as a threatened species. The comment period is extended to accommodate the public notice requirement of the Act and to consider any new scientific information. In addition, reopening of the comment period will allow further opportunity for all interested parties to submit comments on the proposal, which was published on March 24, 1998 (63 FR 14060). We are seeking comments or suggestions from the public, other concerned governmental agencies, the scientific community, industry, or any other interested parties concerning the proposed rule. Comments already submitted on the proposed rule need not be resubmitted as they will be fully considered in the final determination.                     

# DATES:

The reopened comment period closes June 16, 2000. 

# ADDRESSES:

Copies of the proposed rule are available on the World Wide Web at <mountain-prairie.fws.gov/endspp/plants/>. You may also request copies from, and submit comments and materials concerning this proposed rule to, the Field Supervisor, U.S. Fish and Wildlife Service, 4000 Airport Parkway, Cheyenne, Wyoming 82001. Comments and materials received will be available for public inspection, by appointment, during normal business hours at the above address. 

# FOR FURTHER INFORMATION CONTACT:

                        Mike Long, Field Supervisor, Wyoming Field Office (see                         **ADDRESSES**                         section), telephone 307/772-2374; facsimile 307/772-2358.                     

# SUPPLEMENTARY INFORMATION: 

## Background 

                    On March 24, 1998, we published a rule proposing threatened status for                     *Gaura neomexicana*                     ssp.                     *coloradensis*                     in the                     **Federal Register**                     (63 FR 14060). The original comment period closed on May 26, 1998. Section 4(b)(5)(D) of the Act (16 U.S.C. 1531*et seq.*) requires us to “publish a summary of the proposed regulation in a newspaper of general circulation in each area of the United States in which the species is believed to occur.” Due to an oversight, we failed to complete this requirement. To correct the oversight, we are reopening the comment period for this proposal to list                     *G.n.*                     ssp.                     *coloradensis*                     and publishing the required notices. The comment period now closes on June 16, 2000. Written comments should be submitted to the Service (see                     **ADDRESSES**                     section).                 

*Gaura neomexicana*                     ssp.                     *coloradensis*                     is a short-lived, perennial herb endemic to moist soils in mesic or wet meadows of floodplain areas in southeastern Wyoming, northcentral Colorado, and extreme western Nebraska. This early to mid-seral stage species occurs primarily in habitats created and maintained by streams active within their floodplains, with vegetation that is relatively open and not overly dense or overgrown. The disturbance of riparian areas that contain native grasses by agricultural conversion, water diversions, channelization, and urban development threaten                     *G.n.*                     ssp.                     *coloradensis*                     by                           ( print page 31299)                        changing habitat significantly enough to preclude survival of viable populations.                 

Comments from the public regarding the accuracy of this proposed rule are sought, especially regarding: 

(1) Biological, commercial trade, or other relevant data concerning any threat (or lack thereof) to this species; 

(2) The location of any additional populations of this species and the reasons why any habitat should or should not be determined to be critical habitat pursuant to section 4 of the Act; 

(3) Additional information concerning the range, distribution, and population size or trend of this species; 

(4) Current or planned activities in the subject area and their possible impacts on this species; 

                    (5) Biological or physical elements that best describe                     *Gaura neomexicana*                     ssp.                     *coloradensis*                     habitat that could be essential for the conservation of the species;                 

                    (6) Information regarding genetic differences and similarities within and between populations of                     *Gaura neomexicana*                     ssp.                     *coloradensis;*

                    (7) Possible alternative noxious weed control, grazing, farming, and water management practices that will reduce or eliminate impacts to                     *Gaura neomexicana*                     ssp.                     *coloradensis;*                     and                

(8) Other management strategies that will conserve the species throughout its range. 

Comments previously submitted during the first comment period need not be resubmitted, as they will be fully considered in the final determination. 

                    Author. The primary author of this document is Mary Jennings of the Wyoming Field Office (see                     **ADDRESSES**                     section).                 

Authority:                        The authority for this action is the Endangered Species Act of 1973 (16 U.S.C. 1531*et seq.*).                     

Dated: May 2, 2000. 

Jamie Rappaport Clark, 

Director, Fish and Wildlife Service. 

[FR Doc. 00-12122 Filed 5-16-00; 8:45 am] 

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