. Carnegie Institution of Washington publication. RATHBUNIA. 169 The name Pilocereus acranthus was proposed by vSchumann (see plate 5 B of Engler and Drude, Veg. Erde 12: 1911), but was never published. Illustration: Engler and Drude, Veg. Erde 12: pi. 5 B, as Pilocereus acranthus. Figure 237 is from a photograph taken by Dr. Rose at the type locality in 1914; figure 239 shows the flower, and figure 240 the fruit of the plants photographed. 30. RATHBUNIA Britton and Rose, Contr. U. S. Nat. Herb. 12: 414. 1909. Rather slender cacti, simple or bushy, the stems and branches weak, erect or bent; r
. Carnegie Institution of Washington publication. RATHBUNIA. 169 The name Pilocereus acranthus was proposed by vSchumann (see plate 5 B of Engler and Drude, Veg. Erde 12: 1911), but was never published. Illustration: Engler and Drude, Veg. Erde 12: pi. 5 B, as Pilocereus acranthus. Figure 237 is from a photograph taken by Dr. Rose at the type locality in 1914; figure 239 shows the flower, and figure 240 the fruit of the plants photographed. 30. RATHBUNIA Britton and Rose, Contr. U. S. Nat. Herb. 12: 414. 1909. Rather slender cacti, simple or bushy, the stems and branches weak, erect or bent; ribs few, 4 to 8, prominent; spines subulate, those of the flowering areoles not differing from the others; flowers diurnal, scarlet, solitary, usually at the upper areoles, narrowly tubular, the tube bearing distant long scales and united with it except at the tip, elongated, at first straight, or in age somewhat curved, the limb more or less oblique; perianth-segments short, spreading or reflexed; filaments exserted; style slender, exserted beyond the tube; stigma-lobes narrow; ovary with small scales bearing short felt and sometimes spines in their axils; fruit capped by the withered flower, spiny or becoming smooth, globular; seeds of the typical species black, compressed, minutely pitted, with a large basal oblique hilum. This genus commemorates Dr. Richard Rathbun (1852-1918), Assistant Secretary of the Smithsonian Institution in charge of the United States National Museum, a well-known authority on marine invertebrates. Type species: Ctreus sonorensis Runge. We here include 2 species, natives of western Mexico. KEY TO SPECIES. Ribs 5 to S; flowers 4 to 10 cm. long i. R. alamosensis Ribs 4; flowers 12 cm. long 2. R. kerberi 1. Rathbunia alamosensis (Coulter) Britton and Rose, Contr. U. S. Nat. Herb. 12: 415. 1909. Cereus alamosensis Coulter, Contr. U. S. Nat. Herb. 3:406. 1896. Cereus sonorensis Runge in Schumann, Monatsschr. Kakteenk. n: 135. 1901. Rathbunia sonorensis Br
Size: 1508px × 1657px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1902
