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English: The leftmost image shows the entire corm in its tunic.The second shows the tunic partly peeled off to show the leaf bases comprising the tunic and the lines where the sessile leaves sprouted from the corm cortex, showing the nodes that demonstrate that the corm body is a stem with nodes and buds.
The new corm forms at the shoot base just above the old corm. As the new corm grows, short stolons appear that end with the newly growing small cormels. As the plants grow and flower, they use up the old corm, which shrivels away. The new corm that replaces the old corm grows in size, especially after flowering ends.
Colchicum (/ ˈ k ɒ l tʃ ɪ k əm / KOL-chik-əm or / ˈ k ɒ l k ɪ k əm / KOL-kik-əm) [2] is a genus of perennial flowering plants containing around 160 species which grow from bulb-like corms. It is a member of the botanical family Colchicaceae , and is native to West Asia , Europe , parts of the Mediterranean coast, down the East ...
A geophyte (earth+plant) is a plant with an underground storage organ including true bulbs, corms, tubers, tuberous roots, enlarged hypocotyls, and rhizomes. Most plants with underground stems are geophytes but not all plants that are geophytes have underground stems. Geophytes are often physiologically active even when they lack leaves.
The word "bulb" has a somewhat different meaning to botanists than it does to gardeners and horticulturalists.In gardening, a "bulb" is a plant's underground or ground-level storage organ that can be dried, stored, and sold in this state, and then planted to grow again.
Colchicum autumnale, commonly known as autumn crocus, meadow saffron, [3] naked boys [4] or naked ladies, [5] is a toxic autumn-blooming flowering plant that resembles the true crocuses, but is a member of the plant family Colchicaceae, unlike the true crocuses, which belong to the family Iridaceae.
The compact corms are small, brown globules that can measure as large as 5 cm (2 in) in diameter, have a flat base, and are shrouded in a dense mat of parallel fibres; this coat is referred to as the "corm tunic". Corms also bear vertical fibres, thin and net-like, that grow up to 5 cm (2 in) above the plant's neck. [20]
The “bulb” of the bulbous buttercup. The stems are 20–40 cm tall, erect, branching, and slightly hairy, with a swollen corm-like base. [2]: 120 [3] There are alternate and sessile leaves on the stem. The flower forms at the apex of the stems, with 5–7 petals, [3] the sepals strongly reflexed. [2]