
Yucca
Thompson’s yucca grows 6-12 feet high, treelike, with a trunk 5-8 inches in diameter. The trunk is usually unbranched. The leaves are narrow and stiff and grow in a radiating mass near the top; they are 8-24 inches long and about 1/2 inch wide in the middle. They gradually widen from the base to the middle, then narrow to a needlelike spine at the tip. The margins are horny, pale yellow, and more or less fine-toothed. The stout, 2-3 ft. flowering stalk holds a dense panicle of white flowers slightly above the foliage.

''Yucca thompsoniana'', the Thompson's yucca, is a plant in the family Asparagaceae, native to Texas, Chihuahua and Coahuila.
''Yucca thompsoniana'' has a trunk up to 1 m tall, branching above the ground. It flowers before there is any trunk at all, but continues to flower after the stem begins to grow. Leaves are narrow and dagger-like, a bit glaucous, up to 35 cm long and 10 mm wide. Inflorescence is a panicle about 100 cm high. Flowers are white, about 4 cm long. Fruit is a dry, egg-shaped.. more
