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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

penstemon havardii

  1. Big Bend Beardtongue

    Big Bend Beardtongue

    Big Bend Beardtongue (Penstemon havardii: Scrophulariaceae) This perennial herb can reach heights of 1.2-1.8 m (4-6 ft). Big Bend National Park, Brewster County, Texas, USA. Along the Chisos Basin Road at the start of the piyon/juniper/oak belt at ca. 1,524 m (5,000 ft) elevation. Berm of Green...
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