CACTE.E 9 



to a turbinate obtuse point, fleshy, lying close to the micropyle 

 where the wall of the seed is thinner. 



Seedling. 



Hypocotyl succulent, turbinate or obconical, glabrous, pale 

 transparent green, suffused with pale purple, and mottled with pale 

 grey markings, 3 mm. above ground, tapering to a long more slender 

 base, altogether 1 cm. long. 



Cotyledons triangular, obtuse, succulent, horizontal, tapering 

 into the stem with a convex surface both above and below, coloured 

 like the stem, and projecting about 1'5 mm. from it, 2'5 mm. wide 

 at the base, persistent. 



Stem succulent, obtusely five-angled, glabrous, coloured like the 

 hypocotyl, with rows of slender, pink or white, minutely pubescent 

 bristles on the angles. 



Leaves none. 



Cereus Emoryi, Engelm. (fig. 396). 



Primary root tapering, stout with lateral 

 rootlets closely clinging to the soil. 



Hypocotyl turbinate, very stout and fleshy, 

 glabrous, purple, mottled with white, about 5 mm. 

 long. 



Cotyledons short, very fleshy, perfoliate, amal- 

 gamated with the hypocotyl and the stem, with 

 spreading or slightly decurved, triangular, acute 

 points, convex on both surfaces and coloured like 

 the hypocotyl ; free points about 3 mm. long, and -, FlG -' 



' r * ' r Cereus Emoryi. 



as wide or wider at the base. Nat. size. 



Stem fleshy, or succulent, erect in seedling 

 stage, oblong-ovoid, glabrous and glossy, green, slightly suffused 

 with purple, covered with stellate tufts of white, or pale brownish 

 bristles in seven to eight longitudinal rows; about 1* 5-2 mm. 

 between each tuft, and T5-3 mm. between the rows. 



Leaves none. 



Cereus tilophorus, Pfeiff. 



Hypocotyl succulent, clavate, pale purple mottled with pale 

 grey, glabrous, about 7 mm. above ground. 



Cotyledons succulent, triangular, obtuse, horizontal, 1*25 mm. 

 long, 2 mm. wide at the base, coloured like the hypocotyl, 

 persistent. 



Stem succulent, erect, glabrous, coloured like the hypocotyl, and 



