823-533 - Light Micrograph (LM) of a longitudinal section showing xylem elements of old sunflower stem (Helianthus sp.) showing spiral chloroplasts, magnification x1200
764-364 - Cow parsnip (Heracleum lanatum) and Alpine sunflower (Hymenoxys grandiflora) with Crested Butte in the distance, Washington Gulch, Gunnison National Forest, Colorado, United States of America, North America