Sometimes I see gigantic agave plants with meters high flower stalks. (off-the-beaten-track.net)
They are brilliant green in color and emerge as twisty and curly flower stalks from the bulbs of hardneck garlic. (shelovesbiscotti.com)
Watch for its giant group of leaves, followed by the 12 — 18» high flower stalk with about four to eight small blue flowers on top. (parksconservancy.org)