There are many varieties of flowers with thick stems, ranging from tulips to snapdragons to amaryllis. Thick-stemmed flowers are excellent in floral arrangements, as they are sturdy and often have large blooms. Because they tend to be fleshy and less woody than many cuttings, their stems easily take in water, and they remain fresh for a long time.
Calla lillies are summer bulbs of the genus Zantedeschia. These herbaceous plants are native to Africa. Their waxy, cupped flowers come in pink, white, purple, yellow, pink and nearly black. Their thick stems can reach up to 30 inches.
Lisianthus (Eustoma grandiflorum) is an herbaceous annual or short-lived perennial. The "Twinkle" series is a deep blue single flower and "Cinderella" is a double flower; both grow atop long, thick stems.
The gladiolus, also called the sword lily, comes in a wide spectrum of colors, including rarely seen shades like green and tan. Gladiolus bloom along tall, thick flowers spikes, and the flowers can be as large as 5 1/2 inches wide.
The dahlias "Imperialis" and "Timothy Hammett" are well-known cultivars with thick stems. Imperialis is a giant dahlia with pink or purple blooms; Timothy Hammett is a shrub dahlia with lavender flowers with yellow centers.
The Gerbera or Transvaal daisy (Gerbera jamesonii) belongs to the Asteraceae family, which includes sunflowers and chrysanthemums. Its flowers, which range in color from white, orange, pink, yellow and red, grow at the end of thick, 6-inch, leafless stems.
Frilly bergenia (Bergenia ciliata) is a ground cover that produces pale pink flowers on thick, 6-inch stems.