PARADE OF THE DESERT FLOWERS 81 



twelve rounded ridges with acute apexes. Along these 

 ridges the usual system of spines is placed, with the shorter 

 ones radially arranged and very sharp. These radial spines 

 are unequal in length and are spreading from their bases, 

 while the centrals are stouter, the lowest two inches or so 

 long, all thorns having bulbous bases and a tannish brown 

 color scheme, toning off to gray. The flowers are among the 

 largest of the salmon or scarlet forms — when opened, about 

 the length of a large egg — and have twenty-seven broad 

 thick petals, the tips well rounded; or the petals may be 

 notched or tipped with a short point. The general color- 

 ings are from orange-red to a flaming salmon; hence the 

 common name. There are many stamens of about the same 

 length as the style and stigmas. The style branches are light 

 green and are incurved. The stems of this cactus grow 

 singly or in loose clusters, and thrive well in sandy or 

 gravelly loam. 



How to grow 



Little is known about growing this species under cultiva- 

 tion; it transplants readily at almost any season and thrives 

 in sandy or gravelly loam with occasional irrigation to keep 

 the soil moist during dry periods. It may be grown outside 

 in temperatures not below twenty or twenty-five degrees of 

 frost ; in colder weather it should have protection. It grows 

 well in cool conservatories, but does not blossom freely there. 



Rose's Hedgehog Cactus (Echinocereus Rosei) 



(Named for Dr. John Nelson Rose, Associate in Botany, 

 United States National Museum, Washington, D. C.) 



How to identify and how it grows 



Dr. Rose's Hedgehog Cactus Is also of the cylindrical stem 

 variety, has nine to a dozen obtuse ribs in its structure, and 

 Is pale green or bluish green. The usual ridges prevail and 

 are armored with clustering radial spines of unequal length, 



