I(X) 



THE CACTACEAE 



Figure 



Catamayo 



Ecuador, photographed by George Rose in 191 8; figure 146 is from 

 Mrs. J. N. Rose at Matucana, Peru; figure 147 shows its flower a 



19. Lemaireocereus cartwrightianus sp. nov. 



riant 3 to 5 meters high, with woody 

 trunk, much branched; branches consisting 

 of short stout joints, 15 to 60 cm. long, S to 15 

 cm, in diameter ; ribs 7 or 8 ; areoles large, brown- 

 fcltcd; young spines white, brown, black, or 

 variegated, about 20, i to 2 cm. long, except on 

 the old trunk and here 12 cm. long or more; 

 flowers slender, 7 to 8 cm. long, opening in 

 the early evening; outer perianth-segments 

 narrow, 1 to 1.5 cm. long, reddish, erect; inner 

 perianth-segments small, white except at the 

 spreading tips ; filaments numerous, short, 

 included; fruit globular to oblong, 8 to 9 cm. 

 long, covered with clusters of weak spines, de- 

 ciduous when ripe, red without, white within. 



Very common on the flats near Guaya- 

 quil; collected by J. N. Rose, J. H. Burns, 

 and George Rose, north of the city, August 

 II, 1 91 8 (No. 21 1 18). It is characterized 

 by very narrow flowers. 



southern 

 taken by 

 its fruit. 



i 



^ 



i 



1 



Fig. 147. 

 Fig. 148. 



Flower of Lemaireocereus laetus 

 Fruit of same. Xo.6. 



X0.6 



rfl 



Fig. 149. — Lemaireocereus humilis 



Mr 



many 



Service at Guayaquil and who has aided many 



