lemaireocereus. 



89 



This plant is certainly native in south-central Mexico, and 

 distinguishable from the related cultivated /.. griseus by fewer 

 ribs, larger flowers, and ovoid fruit. 



Cereus roridus (Pfeiffer, Kmnn. Cact. 54. 1837) was given 

 as a synonym of Echinocactus pruinosus. 



Cereus edulis Weber (Monatsschr. Kakteenk. 10:55. 1900) 

 is another name for this species, never described. 



Illustrations: Bull. Soc. Acclim. France 52 : f . 1, as Cereus 

 pruinosus; Bradley, Hist. Succ. PL ed. 2. pi. 12, as Cereus ameri- 

 canus octangularis; Monatsschr. Kakteenk. 18: 171, in part; 21: 

 37; U. S. Dept. Agr. Bur. PI. Ind. Bull. 262: pi. 8; pi. 13, f. 2; 

 MacDougal, Bot. N. Amer. Des. pi. 23; Journ. N. Y. Bot. 

 Gard. 8: f. 6, all these as Cereus ebumeus. 



Figure 130 shows a fruit collected by H. H. Rusby in 

 Oaxaca in 1910. 



Fig. 130. — Fruit of Uma 



cereus pruinosus. X0.7. 



5. Lemaireocereus (?) longispinus sp. nov. 



Erect, rather stout, light green, the young growth more or less glaucous; ribs 6, broad at base, 

 somewhat acute, more or less undulate; areoles borne at the tops of the undulations; radial spines 

 about 10, spreading or even reflexed, acieular; central spine elongated, porreet, flattened above, up 

 to 8 cm. long, gray; flowers and fruit unknown. 



Collected by F. Eiehlam in Guatemala in 1909. 



Figure 131 is from a photograph of the type specimen in the collection of the New York 

 Botanical Garden. 



6. Lemaireocereus eichlamii nom. nov. 



Cereus laevigatus guatemalensis Eiehlam in Weingart, Monatsschr. Kakteenk. 22: 182. 

 guatemalensis Vaupel. 



1912. Not C. 



Cylindric, simple in cultivation, deep green except for narrow glaucous bands showing the 

 commencement of new growth; ribs 8 to 10, rather broad and rounded, with acute intervals between; 

 areoles large, brown-felted at first, soon gray; spines 4 to 6, acieular, nearly porreet, 2 cm. long or 

 less; flower-buds obtuse; flower 6 to 7 cm. long; outer perianth-segments greenish purple, obtuse, 

 with serrulate margins; inner perianth-segments purple, 10 to 15 mm. long, widely spreading or even 

 rolled backward; tube proper 15 to 18 mm. long, ribbed within; tube funnelform, 2.5 cm. long, its 

 surface covered with stamens; filaments unequal, white, numerous; style slender, white below, orange 

 above, included; ovary tuberculate, each tubercle crowned by a minute scale; areoles on the ovary 

 bearing brown felt but no spines. 



Type locality: Guatemala. 



Distribution: Guatemala. 



Illustration: Monatsschr. Kakteenk. 22: 183, as Cereus laevigatus guatemalensis. 



Figure 132 shows a plant in the collection of the New York Botanical Garden. 



7. Lemaireocereus chichipe (Gosselin). 



Cereus chichipe Gosselin, Bull. Mus. Hist. Nat. Paris 11: 507. 1905. 

 Cereus mixtecensis J. A. Purpus, Monatsschr. Kakteenk. 19: 52. 1909. 

 ' Lemaireocereus mixtecensis Britton and Rose, Contr. U. S. Nat. Herb. 12: 425. 1909. 



Tree-like, up to 5 meters high, with a short trunk 8 to 10 dm. in diameter and a large very 

 much branched top; branches 9 to 12-ribbed, undulate, acutish, 2 cm. high; areoles 1 to 1.5 cm. 



