百合科旱叶百合属（Xerophyllum tenax）属黑药花科（Melanthiaceae），是一年生植物，与百合花为近亲。原产于北美洲山区，从南不列颠哥伦比亚到加利福尼亚州以及东怀俄明州的亚高山带草地、沿岸山脉都很常见。它也有很多别名，包括：熊草(beargrass)、妻草(squaw grass)、肥皂草(soap grass)、quip-quip及印弟安篮草(Indian basket grass)。

百合科旱叶百合属拥有线状叶，形似芒草般细致，叶片质地硬，但线条柔软自然，多年生白花一次，能长至十五至一百五十厘米高，由接近地面的高度长出成束的稍为蜷曲的叶子。叶子橄榄绿色带锯齿，长三十至一百厘米，宽二至六毫米。花开在从底部长出长茎上，白色，微香。

Xerophyllum tenax is a North American species of plants in the corn lily family. It is known by several common names, including bear grass, squaw grass, soap grass, quip-quip, and Indian basket grass.

Xerophyllum tenax has flowers with six tepals and six stamens borne in a terminal raceme. The plant can grow to 15–150 cm in height. It grows in bunches with the leaves wrapped around and extending from a small stem at ground level. The leaves are 30–100 cm long and 2–6 mm wide, dull olive green with toothed edges. The slightly fragrant white flowers emerge from a tall stalk that bolts from the base. When the flowers are in bloom they are tightly packed at the tip of the stalk like an upright club. The plant is found mostly in western North America from British Columbia south to California and east to Wyoming, in subalpine meadows and coastal mountains, and also on low ground in the California coastal fog belt as far south as Monterey County. It is common on the Olympic Peninsula and in the Cascades, northern Sierra Nevada and Rockies.