High-altitude North American conifer tree.

George Engelmann, also known as Georg Engelmann, (2 February 1809 – 4 February 1884) was a German-American botanist.

(14 November 1843 – 20 May 1909) a German botanist, physiologist, microbiologist, university professor, and musician whose 1882 experiment measured the effects of different colors of light on photosynthetic activity and showed that the conversion of light energy to chemical energy took place in the chloroplast.