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The flowers are rather shy and often hide behind the leaves. The foliage of Large-Flowered Bellwort is attractive and resembles the foliage of Polygonatum commutatum (Smooth Solomon's Seal). However, the leaves of the latter species are sessile or clasping, while the leaves of Large-Flowered Bellwort are perfoliate. The only other species in this genus that occurs in Illinois (the southern part only), is Uvularia sessilifolia (Sessile-Leaved Bellwort). As the name suggests, the leaves of this species are sessile, rather than perfoliate, and its flowers are a little smaller than those of Large-Flowered Bellwort. The 3-celled seed capsules of this species are sharply lobed (even winged), while the corresponding lobes of Large-Flowered Bellwort are well-rounded. Another species in this genus, Uvularia perfoliata (Perfoliate Bellwort), occurs in areas to the east of Illinois. This species has perfoliate leaves like Large-Flowered Bellwort. However, its seed capsules are truncated at their tips and its tepals have glandular hairs on the interior surface. Large-Flowered Bellwort has seed capsules with rounded tips and its tepals are smooth on the interior surface.