Opuntia pinkavae Opuntia pinkavae Opuntia pinkavae, common names Bulrush Canyon prickly-pear or Pinkava's pricklypear, is a species of cactus known only from northern Arizona and southern Utah. It grows in sunny locations in grasslands, on the edges of pinyon-juniper woodlands, on sandy or limestone soils. It was named for Dr. Donald Pinkava, professor emeritus at Arizona State University in Tempe. He studied "Opuntia" for many years. The species is one of the smaller members of the group, rarely more than 25 cm (10 inches) tall. Stems are green, flattened, up to 15 cm (6 inches) long. Flowers are magenta with yellow to
Afro-textured hair square centimeter. This was significantly lower than that of Caucasian hair, which, on average, has approximately 227 hairs per square centimeter. Loussourarn found that afro-textured hair grows at an average rate of approximately 256 micrometers per day, whereas Caucasian hair grows at approximately 396 micrometers per day. In addition, due to a phenomenon called 'shrinkage', afro-textured hair that is a given length when stretched straight can appear much shorter when allowed to naturally coil. Shrinkage is most evident when afro-hair is (or has recently been) wet. The more coiled the hair texture, the higher its shrinkage. An individual hair's shape