74 



THS CACTACEAE. 



;ereus marginatus (De Candolle) Britton and Rose, Contr. U. S. N; 



^ 



Cereiis marginatus De Candolle, Mem. Mus. Hist. Nat Paris 17: 116. 1828. 

 Cereus genimatus Zuccarini in Pfeiffer, Enum. Cact. 96. 1837. 



1909. 



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V 



Fig. 108.— Flower of P. chrysomallus. X0.7 



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Fig. 109. — Longitudinal section of flower 



of P. chrysomallus. X0.7. 



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Fl 



what^cX il^ J f^l!'' J:^^' '^''^' ^^^^">; ^^T^^; ^ibs 5 or 6 (7 in the original specimen), "some- 

 adeLe whiw?.h^nroi r^ m age, areoles close together, usually confluint, their wool forming 

 a dense white cushion along the ridge of each rib; spines at first 5 to 8(1 central) in old areoles more 



a^W ^sVaUv dofX t?' ^"' 'l^-^f^' l'^'^' ^^^^ "--'--' briTt^y and . crl long W^^^ 



often^L^nate \nd ^Lt^^ ^^T ^^\^^^^'' apparently only one at an areole, but recorded as 

 oiien geminate, and appeanne anywhere alontr tv,p rJhc f^r.^ +t,A^^ a j. n' <- ir 



ovary 



ywhere along the ribs from the top downward 



yellowish rSwtWncov^ 'P-^'"' ^'T S^°^^^^^' ^^^"^ 4 cm. in diameter, not very fleshy, 



SJlTom^e^^lt^SgT^^^^ ^ ,^-;Lr ''■' '-'' — -^^-^' 



r^*/?^ locality: Mexico. 



Di5/ri&z.^i.n.- Hidalgo, Queretaro, and Guanajuato, and widely planted 

 and naturahzed throughout Mexico. vviuciy pidnuea 



comm 



sr.:-if?f £-:--r-'' = '=^^^^^ 



/>w/a/ 



(Enum 



and Cereus mirhelii are all 



re- 



om 



Cereus incrus- 



referred to this species by Steudel. 



Illustrations: Contr. II. S N^ 



name 



Monatsschr. Kakteenk 



Herb. 5: pi. 59, 60; Bull. Soc. Acclim. ^'^; ''"^"I'^r/ 



^,-j/v:-L--^^?^^^ 



of P. marginatus 

 Natural size. 



Journ, Intern 



natsschr. Kakteenk. 23: 149, as Cereus marginatus 



Handb. Kakteenk 



J 



s; Mo- 

 2: 169, 



22, as C. marginatus gemmatus. 



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