The Buckhorn Cholla is a dwarf tree or shrub composed of many stems ascending from the base and forming into a compact head of dangerously thorny branches, very woody in appearance. These branches or joints are four inches or more in length, cylindrical and yellow-green. They are tubercled and have a fringe of yellowish or red-brown spicules, very short and sharp, and many loose clusters of fierce red-brown thorns about an inch long, partly sheathed. The flowers are two inches or more in length, greenish yellow with the tips suffused with red. The fruit is pear-shaped and very thorny, and has the peculiarity noted quite often among Cholla of becoming dry when fully ripe. This species bears its fruit in June and July. How to grow Young plants grow readily if set out in the spring in rocky or gravelly soil with occasional watering to moisten the soil until the plants become established. Cuttings grow quite easily if planted in spring, and also the plant can be grown from seed sown in sandy soil in pots or flats. This species is not injured by a temperature of twenty degrees below freezing and grows readily outside or indoors. Golden Spined Jumping Cholla; Teddy Bear Cactus (_Opuntia Bigelovii_) (Named for Dr. J. M. Bigelow, an early enthusiastic student of southwestern botany) How to identify and how it grows The Golden Spined Jumping Cholla, or Teddy Bear Cactus, is a very conspicuous and attractive plant among the Cholla species, and is the spiniest of all this clan, growing as high as twelve feet, and with a very tough stout main trunk sometimes eight feet tall and three or four inches in diameter, from which appear numerous ascending branches forming a dense rounded head. The joints or branches are three to six inches long and are yellow-green. There is a dense armor of light golden-yellow spines, dark at their tips, eleven to fifteen of them interlocking, an inch of more in length and covered with paperlike sheaths which are somewhat loosely placed. The spicules are straw-colored and appear in the form of bundles. The flowers of this Cholla are borne at the tips of the joints and are pale green suffused with purple. The fruit is covered with tubercles or knobs and is yellowish green. This plant grows best in the most arid parts of the Southwest and in the hottest southern exposures of rocky foothills and slopes. How to grow Young plants may be transplanted at any season, or joints may be planted in gravelly rocky soils. The plants should be watered once a month during the growing season until well established, after that less frequently. They will grow indoors and out, and are not injured by a temperature of twenty degrees below freezing. With colder temperatures they require protection. Many Colored Tree Cholla (_Opuntia versicolor_) (Named from the many colors of its joints and flowers) How to identify and how it grows