HYLOCERHUS. 



191 



12. Hylocereus extensus (Salm-Dyck). 



Cereus extensus Salm-Dyck in De Candollc, Prodr. 3: 469. 1828. 



ping and probably often climbing, bearing the usual acri 



areolcs 



small, woolly and often setose; spines 2 or 3, rarely 4, very short and stout, dark brown, 1 to 2 mm. 



long; nowers large ana nandsome; tube green, cylindnc; scales of the ovary ovate; scales of the tube 

 rather short, becoming elongated above and passing into the narrow outer perianth-segments, 

 greenish yellow, tipped and margined with red; inner perianth-segments oblong to obovatc, acute, 

 rose-red; style thick, longer than the stamens; stigma-lobes linear, entire; fruit not known. 



Type locality: Not cited. 



Distribution: Trinidad, according to Curtis's Botanical Magazine. 



The above description is based on the figure and description found in Curtis^s Botani- 

 cal Magazine as below cited. This may or may not belong to the plant described by De 

 Candolle (Prodr. 3: 469), for he describes the radial spines as 10 to 12, pilose and white, 

 and the centrals as 2 to 4, small, rigid, and yellow; it is hardly the Ccrcus extensus of PfeifTer 

 (Enum. Cact. 119), where the inner perianth-segments are said to be white and obtuse. 



Cereus suhsquamatus Pfeiffer (Allg. Gartenz. 3: 380. 1835) is referred here by PfeifTer. 



1909. 



Illustration: Curtis's Bot. Mag. 70: pi. 4066, as Cereus extensus. 



13. Hylocereus napoleonis (Graham) Britton and Rose, Contr. U. S. Nat. ] 



Cereus napoleonis Graham in Curtis's, Bot. Mag. 63: pi. 3458. 1836. 



Stems much branched, Hght green, the joints with 3 acute angles and concave sides; angles 

 tuberculate, with repand intervals, not at all hornxj areoles about 4 cm. apart; spines 4 or 5, rigid, 

 about 9 mm. long, with swollen bases; flowers 20 cm. long and nearly as broad; tube 7.5 cm. long, 

 green, bearing a few subappressed, deep red scales, gradually enlarging upward; outer perianth- 

 segments yellow, lanceolate, linear; inner perianth-segments pure white, spatulate-lanceolate, crcnate 

 at apex; stamens numerous, yellow; pistil stout; stigma-lobes numerous, entire. 



Type locality: Unknown; described from a cultivated plant. 



Distribution: West Indies and southern Mexico, according to Schumann; but we 

 know it definitely only from the original illustration. 



The origin of this species has long been in doubt. It was described by Graham at the 

 time it flowered in the botanical garden at Edinburgh. The plant had then been in cultiva- 

 tion for about ten years, having been sent by a Mr. McKay of Clapton, but without any 

 record of its source. It is possible that ' " « -^^ - - ----- 



H 



most emphatic terms 



Loudon (Gard. Diet. 2:65. 1827) Cactus napolcoi 



Its offered by L. C. Noisette, a nurseryman 1 



name was published in the Botanical Magaz 



Cpyp.ias trinnpularis maior Salm-Dyck, Alls 



This was 



1836 and Cactus napo- 



Hortus. unoubHshed names, are often given as synonyms 



Cereus lanceanus (G. Don in Sweet, Hort. Brit. ed. 3. 285. 1839), C". inversiis, ^nd C. 



names 



(Handb. Cact. 422. 1846). 



from Santo Domingo resemble 



U 



Washingt 



(Rose, Nos. 

 from Aruba 



West 



(Enum. Cact. 117. 1837) refer 

 laps the best disposal to make 

 ct resembles Acanthocereus pen 



Burmann 



has 



Gossehn considered it an undescribed 



plumieri (Gosselin, Bull. Soc. Bot. France, 

 SionT; Curtis's Bot. Mag. 63: pi. 3458; Loudon, Encycl. PI. ed. 2 

 poleonis; (.?) Plumler, Pi, Amer. ed. Burmann, pi. 200, f. i, as 



S- 



