40 



THE CACTACEAE. 



included, the inner row appressed against the style; style creamy white, 6 cm. long, exserted 

 beyond the perianth-segments; fruit 4 cm. in diameter, flattened above, dark wine-colored; seeds 

 smooth, black, shining. 



Type locality: Near Habana, Cuba. 



Distribution: Coastal regions of Matanzas and Habana, Cuba. 



This species was recorded by Grisebach as Cereus royenii armatus. 



Illustrations: Journ. N. Y. Bot. Gard. 11: 226, f. 28; Roig, Cact. Fl. Cub.pl. [3], f. 1, 

 as Cephalocereus bakeri. 



Figure 52 shows a flower of Cephalocereus robinii, and figure 53 its fruit; figure 54 is 

 from a photograph of the plant obtained by Brother Leon at the type locality. 



18. Cephalocereus keyensis Britton and Rose, Contr. U. S. Nat. Herb. 12: 416. 1909. 

 Cereus keyensis Vaupel, Monatsschr. Kakteenk. 23: 23. 1913. 

 Plant 5 to 6 meters high, little branched, the branches almost erect, 5 to 6 cm. in diameter, the 

 trunk up to 12 cm. thick; ribs 9 or 10, narrow, separated by deep grooves, bluish green, very glaucous; 

 areoles 1 to 2 cm. apart, slightly elevated; spines about 15, acicular, yellow, diverging, 1.5 cm. long 

 or less; wool very short, less than 1 mm. long, white, turning grayish; flowers brownish purple, 

 narrowly campanulate, 6 cm. long, with a strong odor of garlic when opening in the late afternoon 

 or evening, odorless the next morning; outer perianth-segments oblong-spatulate, bluntly pointed, the 

 inner acutish ; style scarcely exserted ; fruit depressed-globose, reddish, 3.5 cm. thick, about 2 cm. high. 



Fig. 55. — Cephal 



-Flower of C. keyensis. 

 -Fruit of same. X0.7. 



Fig. 58. — Flower of Cepha- 

 locereus monoclonos. 



Type locality: Hammock, Key West, Florida. 



Distribution: Key West, Big Pine Key, and Boca Chica Key. 



The plant is now very nearly exterminated on Key West, owing to the necessity for 

 military purposes during the war with Germany of clearing the hammock in which it grew. 

 Dr. Small succeeded in establishing it in flourishing masses in the cactus garden of Mr. 

 Charles Deering at Buena Vista, Miami, Florida. 



Illustration: Journ. N. Y. Bot. Gard. 10: f. 25. 



Figure 55 is from a photograph of the type plant taken by Marshall A. Howe; figure 

 56 shows its flower and figure 57 its fruit. 



