70 



TH^ CACTACBAE. 



Type locality : South of the Altar River, Sonora, Mexico 



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Distribution: Sonora and Lower 



imoortant cactus in northwestern Mexico 



dominant 



mas soHtary plants, giants 



remnants of great 



plain. In Lower 

 made up almost 



tirely of this species. The natives call these plants cardon. They 

 er the wood for firewood and use it to make walking-canes, or in building their simple 

 ;es, especially for rafters and beams ; the Yaqui Indians, especially, gather the seeds 

 make a kind of flour by crushing them, and this is made into tomales. It is common 



of California, all along the east 



Lower California, and alone the west coast of Lower Cahfornia as far north as 



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many 



Magdalena Bay. In this distribution we have included the two species Cereus calvus and 



from 



They may or may 



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cifically distinct from P. pringlei, but without further data it is best to refer them here. 



Illustrations: Card, and For. 2:f. 92 ; Monatsschr. Kakteenk. 18: 119; Rep. Mo. Bot 

 Card. 16: pi. I, f. I to 4; Schumann, Gesamtb. Kakteen f. 13; Schelle, Handb. Kakteenk 

 f. 19; MacDougal, Bot. N. Amer. Des. pi. i2, 13; Rep. U. S. Nat. Mus. 1897: pl- 6, as 

 Cereus pringlei; Contr. U. S. Nat. Herb. 16: pl. 130; Stand. Cycl. Hort. Baileys: f- 2695 



Figure 104 is from a photograph taken at Magdalena Bay, Lower California. 



2. Pachycereus orcuttii (K. Brandegee) Britten and Rose, Contr. U. S. Nat. Herb. 12: 422. 1909 



Cereus orcuttii K. Brandegee, Zoe 5: 3. 1900. 



"Stems erect, branching, bright green, reaching a height of 3 meters and a diameter of 15 cm. 

 with hard woodv center; ribs 14 to 18, about i cm. high; areoles round, about 6 mm. in diametei 



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1 





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:gul 



with short, hght gray 



more than twice 



ually stouter and darker, porrect, often reaching a length 



length 



intermediates; flowers greenish 



ovary denseb 

 yellowish 



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imbedded dark brown bristles 4 to 6 cm. long; stamens lining the upper half of the tube; style tips 

 acute; fruit not known. . 



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which this descriotion is drawn was obtained bv Mr 



little distance. 



May 1886. It was brought to him by his guide, who found it off the trail some 



has 



fornia, being densely covered with bright yellow-brown spines." 



Mr. Orcutt's garden, and is now about 2 meters 

 It is much the finest of the large Cerei of Baja Call- 



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Type locality: Rosario, Lower C 

 Distribution: Known onlv from 



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from Mrs 



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June 1900. Dr. Rose saw the type plant in 1908 at San Diego, California, and at that 

 time obtained a flower and bud from Mr. Orcutt. Afterwards Mr. Orcutt photographed 

 the plant and a flower and sold the prints. The photograph has also been printed on card- 

 board and distributed in an advertisement for Orcutt's American plants. A set of these 

 photographs is in the National Herbarium. 



3. Pachycereus pecten-aboriginum (Engelmann) Britten and Rose, Contr. U. S. Nat. Herb. 12: 



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y ■ 



, T 



h r 





/ 422. 1909 



Cereus pecten-aboriginum Engelmann in S. Watson, Proc. Amer. Acad. 2i : 429. 1886. 



Tree-like, 5 to 10 meters high, with a trunk i to 2 meters high and 3 dm. in diameter, crowned 

 with many erect branches; ribs 10 or 11; areoles t cm. in diameter or even less, extending downward 

 in narrow grooves, in the flowering ones forming brownish cushions connecting with the areoles 





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