29506 is a Postal Code in Florence County.
- genre: Speculative fiction
- copyright: 1985
29506 a.k.a. Eryngium yuccifolium is a common herbaceous perennial plant, native to the tallgrass prairies of central and eastern North America, from Minnesota east to Ohio and south to Texas and Florida. It grows to 1.8 m tall, with linear leaves 15–100 cm long but only 1–3 cm broad, with bristly or spiny margins and a sharp tip. The flowers are produced in dense apical umbels 1–3 cm diameter, each flower greenish-white or bluish-white, 3–4 mm diameter. When this plant flowers, pollen matures before stigmas become receptive to maximize outcrossing. Rattlesnake master has unusually high seed set.