22 



THE CACTACEAE. 





\f^ 



8 to 12, brown; flower lo to 12 cm. long, the tube 5 to 6 cm. long; outer perianth-segments pinkish; 

 inner perianth-segments white; ovary small, bearing a few very small scales, these broader than 

 lonjj, with minute brown chartaceous tins: fruit dobular. a to c cm in Hinmpfpr 



T. 



^ii 



Type locality: Carthagene 

 Distribution: Brazil, nortl: 

 This is one of the best floi 



and 



more or less abundantly from April to September 



The 



The species was named for William Sp 



.gnificcnt 



Duke of Devonshire 



iformis (Weingart, Monatsschr. Kakteenk 



ijonms Riccobono (Boll. R. Ort. Bot. Palermo 



and 



^^ 



1909) probably belong here. 



We have referred here Cereus euchlorus, which originally came from Sao 



We have specimens growing which were obtained under this name from M. SinTon 

 Oucn, Paris, in 1901. 



St 



,-'t1 



.^ 



^r 



:^A 



^ 

 ^-'1 



s 



-It 



Hj 



^lonograph 



Fig. 20.— Monvillea cavendishii. 



+ 



been much m doiihf q< 



^'^' 2';~^*^"villea insularis. X0.5. 



? of this species. Schumann 



In his Nachtrage, published in 1 9o7 he pW t wi t h r "^ I.' '^ ^^/eries Tenuiores. 

 in his series Anomali. but in Ws'k;^ S hL l^f fl"! obtusan.ulus (now Zygocactus) 



the series Tenuiores. 

 recently trajisferred 



his Keys, pubHshed about the same time, he 



mus Piptanthocereus, while Riccobono' ha 



Both the names CcreTcZjt^h.^liT T, P™"' ""' ^"^ ^^^ differ. 



sugcested th.t fl " ' :r.!"i':V^''*"'«"^«»f ^^--e i" general use until Schu 



them defim'tely unde 



same 



name of Cereus paxtonia 



Joseph Hooker 



' \. 



Illustrations: Monatsschr. Kakteenk. 



toniamis. 



rhodoleucanthus; Curtis's Bot. Mag 



19: 77, as Cereus saxicola; Monatssch 



■^vj 



Kak 



pax 



*When first pubHshed it was stated tharnkT ^ ' " — 



^nca. possibly Brazil. wWle M^SS^edfect e'd^tTnTeS "Carthagene." 







Schumann says probably South 



\-a ■ 



7^ y 



^ - f. ^ 





-'\ 



J 

 -F 



' ^-"^ 



