BINGHAMIA. 



I6 7 



Amcr. Hort. Bailey i: f. 413; Emory, Mil. Reconn. pi. opp. 72; Fl. Serr. io:pl. 977 A; 

 15: pi. 1600; Card. Chron. III. 45: f. 69; Gartenflora 31:217; Hornaday, Camp-fires on 

 Des. and Lava opp. 42, 68, 72, 82, 154; Lumholtz, New Trails in Mex. opp. 48; 

 Monatsschr. Kakteenk. 10: 187; Bot. Wheeler Surv. frontispiece; Nat. Geogr. Mag. 21: 

 711; Orcutt, Cact. 5 ; Plant World g:f. 46; n 5 :f. 2; n'":f. 2 to4;Rumpler, Sukkulenten 

 f. 63; vSargent, Man. Trees N. Amer. f. 558; Diet. Gard. Nicholson Suppl. f. 231 ; Garden i: 

 263; Vegetationsbilder 4: pi. 40. B; pi. 41, 42; Garten-Zeitung 3:58. f. 15; MacDougal, 

 Bot. N. Amer. Des. pi. 48, 54 to 56, mostly as Ccrcus giganteus; Nat. Geogr. Mag. 27: 85, 

 as Cactus; Forster, Handb. Cact. ed. 2. 663. f. 88, as Pilocereus giganteus; Journ. Intern. 

 Gard. Club 3: 17. 



Plate xxn shows the top of a plant, brought to the New York Botanical Garden by 

 Dr. MacDougal in 1903, in flower June 1912; plate xxm is from a photograph taken by 

 Dr. MacDougal near Tucson, Arizona. Figure 234 is from a photograph also taken by Dr. 

 MacDougal, 60 miles west of Tucson, showing a single plant; figure 235 shows the fruit 

 collected by Dr. MacDougal, near Tucson, in 1905. 



29. BINGHAMIA gen. nov. 



Bushy, more or less branched cacti, the stout branches many-ribbed; ribs low, usually very 

 spiny; flowers white, solitary at an areole, funnelform-campanulate, opening at night, of medium 

 size, the tube straight and stout; style exserted; stamens weak and reclining on the underside of 

 tube; scales on ovary and tube small, narrow, bearing a few hairs in their axils but no spines; fruit 

 turgid, juicy, globular, crowned by the withering-persistent flower; seeds black, small. 



We recognize 2 species in this genus, inhabitants of western Peru; it is dedicated to 

 Hiram Bingham, Director of the Yale University Expedition to Peru, 1914-1915. The 

 type species is Cephalocereus melanostele Vaupel. 



KEY TO SPECIES. 



Upper areoles of the flowering plant long-bristly, bearing spines 



Upper areoles bearing acicular spines similar to those of the lower 



1. Binghamia melanostele (Vaupel). 



Cephalocereus melanostele Vaupel, Bot. Jahrb. Engler 50: Beibl. in: 12. 1913 

 Much branched at base, the loto 12 branches 

 strict, usually only i meter high; ribs 18 to 22 

 (perhaps sometimes more), low, close together; 

 areoles approximate, circular, bearing short white 

 and yellow spines; spines very numerous, diverse, 

 those on sterile branches stiff and pungent, the 



. i. B. melanostele 

 .2. B. acrantha 



FIG. 236. Binghamia meUinosU-'e. 



FIG. 2.^7. Ringhamia acrantha. 



