108 Mr. Haworth's Description of the Subgenus Epiphyllum 



Ackcrmanni, in compliment to the son of Mr. Ackermann in the 

 Strand, London, its meritorious introducer into this country. 

 I remain, &c. your old correspondent, 



A. H. Haworth. 



Classis et Ordo. Icosanduia Monogynia. 

 Ordo Nat. Cacte;e, DeCandolle Prod. Syst.Veg.S. 4^51. 

 Cacti, Juss. 4'c. 

 Genus Epiphyllum. — Herman, Pa?: Bat. add. — Nob. Synops. 

 Slice. 197. — Neck. elan. 1. p. 85. (ex DeCand.) 



SUBGENERIS CHARACTER. 



Corollce tubus longissimus, mediocris vel brevissimus, sparsim 

 et remote squamulosns inermis, e crenis ramulorum oriens, 

 inter perpusillas et innocuas spinulas: limbus (corollae fu- 

 gacis) altemultifidus vel quasi polypetaloideus rosaceus, aut 

 subinde plus minus elegantissime ringens. 



Siiff'rutices Americas calidioris ramosi graciles, sed vix scan- 

 dentes, in scopulis rupbusve; velinsuperarborum truncos; 

 ramulis alatim compressissimis, tenuibus sed carnosulis, 

 lobato-crenatis, viridibus Ifevibus, axe centrali gracili ligneo. 



Flores solitarii ssepius inagni speciosi, albi, rosei, coccineive, 

 rarius suaveolentes. 



Obs. Radicem versus ramuli incipientes subinde pullulant 

 angulati, qui denique, semper fortasse, sursum gradatim 

 alati evadunt. Cereorum caetera, et etiamsi genus vel sub- 

 genus absque artificiali charactere, vfere naturale est. 



* NocTURNA, corollis fugacibus suaveolentibus albis, 

 noctu solum aperientibus tubo longissimo. 



Specierum Characteres. 

 Phyllanthus. E. (The long-tubed night-flowering) corolla parva 



1 . tubo fere pedali multoties longiore, stigmatibus decern. 



Epiphyllum Phyllanthus. Nob. in Synops. Slice, 197. 

 excluso syiion. Phik. quod ad E. phyllanthoidem melius 

 pertinet. 



Cactus Phyllanthus, Linn. Sp. PI. 1. 670. DeCand. 

 Plant. Grasses, t. 1^5. 



Cereus Scolopendrifolio, &c. Dill. Elth. t. 64. f. 74. 



Habitat in America Meridionali. 



Hookeri. E. (The lesser-tubed-night flowering) corolla me- 



2. diocri tubo subsemipedali, duplo longiore, stigmatibus 

 subtredecim. 



Cactus Phyllanthus, Hook, in Bot. Mag. 2692. 

 Obs. Flores non vidi. Hookeri figura solum examinavi. 



Habitat 



** Diurna, 



