Chives are a bulb-forming herbaceous perennial plant, growing to 30–50 cm (12–20 in) tall. The bulbs are slender, conical, 2–3 cm (3⁄4–1 1⁄4 in) long and 1 cm (1⁄2 in) broad, and grow in dense clusters from the roots. The scapes (or stems) are hollow and tubular, up to 50 cm (20 in) long and 2–3 mm (1⁄16–1⁄8 in) across, with a soft texture, although, prior to the emergence of a flower, they may appear stiffer than usual. The grass-like, leaves, which are shorter than the scapes, are also hollow and tubular, or terete, (round in cross-section) which distinguishes it at a glance from garlic chives (Allium tuberosum). The flowers are pale purple, and star-shaped with six petals, 1–2 cm (1⁄2–3⁄4 in) wide, and produced in a dense inflorescence of 10-30 together; before opening, the inflorescence is surrounded by a papery bract. The seeds are produced in a small, three-valved capsule, maturing in summer. The herb flowers from April to May in the southern parts of its habitat zones and in June in the northern parts.[ Chives are the only species of Allium native to both the New and the Old Worlds. Sometimes, the plants found in North America are classified as A. schoenoprasum var. sibiricum, although this is disputed. Differences between specimens are significant. One example was found in northern Maine growing solitary, instead of in clumps, also exhibiting dingy grey flowers.[ Although chives are repulsive to insects in general, due to their sulfur compounds, their flowers attract bees, and they are at times kept to increase desired insect life.