270 



THE CACTACEAE. 



Figxire 242 is from a photograph taken by IMr. Collins in 1902; it is three-fourths 

 natural size. 



On page 58, vol. 11. under Cephalocereus Jiermentiamis, add: Illustration: ]\Iollers 

 Deutsche Gart. Zeit. 25: 473. f. 5, No. 10, as Pilocereus hermentianus. 



On page 58, vol. 11, under Pilocereiis albisetosus, add the sjTionyms: Cactus alhisetosus 

 Sprengel, Syst. 2 : 496. 1825 ; Cactus albisetus Steudel, Xom. ed. 2. i : 245. 1840. 



On page 61, vol. 11, under Espostoa lanata, add to illustrations: Schelle, Handb. 

 Kakteenk. 105. f. 41, as Pilocereus lanattis; Schelle, Handb. Kakteenk. 105. f. 42, as 

 P. lanatus cristatiis; Wiener lU. Gart. Zeit. 11: pi. 3, in part, as P. daut'u.'itzii. 



On page 64, vol. 11, under Stetsonia coryne, insert: W. B. Alexander wrote, under date 

 of March 7, 1921, as follows: 



"Xoticiiig your statement that the fruit of Stetsonia coryne is unknown, I obtained a ripe specimen 

 at La Bioja for you and am sending it by parcel post." 



This we describe as follows : 



Oblong, 6 cm. long, glabrous, bearing scattered scales, these 5 mm. broad, i mm. high, each 

 with a cartaceous tip and a denticulate margin; seeds numerous, small, 1.5 mm. long, flattened, 



pitted; hilum large, basal. 



On page 65 , vol. 11, under Stetsonia coryne, add to illustrations : Thomas, Zimmerkultur 

 Kakteen 1 1 , as Cereus coryne. 



On page 66, vol. 11. under Escontria 

 chiotilla, add to illustrations: MoUers 

 Deutsche Gart. Zeit. 29: 438. f. 13; 

 Floralia 42: 389, as Cereus chiotilla. 



On page 69, vol. 11. under Pachy- 

 cereus pringlei, insert: The distribution 

 of Pachycereus pringlei in northern So- 

 nora is not well defined. Dr. IMacDougal 

 has recently visited northwestern Sonora 

 and states that he saw it along the route 

 between Altar and Port Libertad to 

 within a hundred miles of the United 

 States boimdar}-. Prospectors and 

 ranchers also speak of it as being abun- 

 dant in the valley of the Asuncion or 

 Altar River some miles to the north- 

 ward. He writes of it as follows : 



" On the whole, however, my chief inter- 

 est was centered on the sowesa or Pachycereus 

 pringlei. We began to get into this about S5 

 miles from the Guh", and in the region below 

 a thousand feet it attains perfectly tremend- 

 ous size, as you will see from some photo- 

 graphic prints." 



Figure 243 is from a photograph 



Fig. 242. — Cephalocereus collinsii. 



obtained by Dr. MacDougal at Port Libertad, Sonora, May 4, 1923. 



