CACTEjE. V. EPIPHYLIUM. VI. OPUNTIA. 



171 



Tj . D. S. Native of Mexico. Cereus oxypetalus, D. C. prod. 

 3. p. 470. Flowers 4 inches long, reddish brown on the out- 

 side, and white inside. Berry red, oblong, ribbed, attenuated at 

 both ends. Branches like those of E. phyllantholdes. 

 Sharp.-petalled Epiphyllum. Shrub 2 to 3 feet. 



7 E. AIA'TUM (Haw. suppl. p. 84.) corolla small, greenish 

 white ; tube very short ; berry blackish. Jj . D. S. Native of 

 Jamaica, on the trunks of trees. Cereus alatus, D. C. prod. 3. 

 p. 470. Cactus alatus, Swartz. fl. ind. occ. 878. Link. enum. 

 2. p. 24. exclusive of the D. C. syn. 



Winged Epiphyllum. Fl. June. Clt. 1810. Sh. 1 to 2 ft. 



8 E. AKERMA'NNI (Haw. in phil. mag. Aug. 1829. p. 108.) 

 corolla large, rather ringent, assurgent before expansion, and 

 acute at the apex, nearly 4 times longer than the tube ; stigmas 

 7. f? . D. S. Native of Mexico, from whence it was brought 

 by a Mr. Akermann. Cactus Akermanni, Hortul. Flowers 

 large, scarlet. Petals keeled, a little recurved at the apex. 

 Branches flat, thin, seldom with any spines in the notches except 

 when young. 



Akermann' s Epiphyllum. Fl. June, July. Clt. 1829. Shrub 

 1 to 3 feet. 



9 E. CRISPA'TUM (Haw. in phil. mag. Feb. 1830. p. 109.) 

 branches cuneate-oblong, waved ; margins appearing curled 

 from large crenatures. 1? . D. S. Native of Brazil. Flowers 

 not seen. 



CWfed-branched Epiphyllum. Clt. 1829. Shrub 1 to 2 ft. 



10 E. TRTJNCA'TUM (Haw. suppl. p. 85. et in phil. mag. vol. 4. 

 p. 188.) corolla reflexed, ringent; tube very short ; branchlets 

 dichotomous, truncate at the apex. Tj . D. S. Native of South 

 America. Cactus truncatus, Link. enum. 2. p. 24. Ker, bot. 

 reg. 696. Sims, bot. mag. 2526. Hook. exot. fl. t. 20. Lodd. 

 bot. cab. 1207. Cereus truncatus, D. C. prod. 3. p. 470. Flowers 

 rising from the truncate tops of the branches, red or rose-co- 

 loured, hardly 3 inches long, oblique ; stamens white, ascending ; 

 stigmas 7, closely conniving. Joints of stem compressed. This 

 species appears to be an intermediate plant joining Epiphyllum 

 with Opuntia. It is a very elegant plant when in blossom. 



Truncate Epiphyllum. Fl. July, Sept. Clt. 1818. Shrub 

 1 foot. 



Cult. The species of Epiphyllum are extremely showy when 

 in flower. Their culture and propagation are the same as that 

 recommended for the last genus. They are known at first from 

 all the other genera of this order by their flat elongated branches. 



VI. OPU'NTIA (some species grows plentiful near Opus, a 

 city of Locris). Tourn. inst. 239. t. 122. Mill. diet. Haw. syn. 



187. D. C. prod. 3. p. 471 Tuna, Dill. hort. elth. f. 379. and 



383. Cactus Opuntia, Willd. enum. suppl. p. 33. D. C. cat. 

 hort. monsp. Link, enum. 2. p. 23. 



LIN. SYST. Icosandria, Monogynia. Sepals numerous, leaf- 

 formed, adnate to the ovarium : upper ones flat and short : inner 

 ones petal-formed, obovate, rosaceous, expanded : without any 

 tube above the ovarium. Stamens numerous, shorter than the 

 petals. Style cylindrical, constricted at the base; stigmas many r 

 thick, erect. Berry ovate, umbilicate at the apex, tubercled, and 

 usually bearing spines. Embryo rather spiral, nearly terete. 

 Cotyledons semi-terete (ex Gaertn. fruct. 2. t. 138.), after germi- 

 nation becoming foliaceous, and flat, but thickish. (see Dill. elth. 

 f. 381.) Plumule small. Shrubs, with the trunk at length be- 

 coming terete, but having the young branches very rarely cylin- 

 drical, but usually more or less compressed, and jointed ; joints 

 ovate or oblong, bearing fascicles of spines or bristles, which are 

 disposed in a quincuncial or spiral order. Leaves nearly the 

 form of those of some species of Sedum, but fall off very soon, 

 one under each fascicle of spines or bristles on the branches 

 when young. Flowers rising from the fascicles of spines or 



bristles, or from the edges of the joints, either yellow or reddish. 

 Stamens rather irritable to the touch. 



SECT. I. CYLINDRA'CE.S: (from cylindraceus, like a roller ; in 

 allusion to the cylindrical branches). D. C. prod. 3. p. 471. 

 Stems cylindrical, neither jointed, nor furrowed, but bearing areo- 

 late convex tubercles, and fascicles of prickles. The species of 

 this section are not sufficiently known, or probably they would 

 have constituted an intermediate genus between Cereus and 

 Opuntia. 



1 O. ROSEA (D. C. diss. t. 15.) plant erect, rose-coloured ; 

 stems and branches tubercular ; tubercles oblong, depressed, 

 disposed in spiral series, bearing each at the apex a caducous 

 leaf, and a fascicle of straight white prickles ; flowers nearly ro- 

 tate, usually by fours at the tops of the branches. Tj . D. S. 

 Native of Mexico. Cactus subquadrifl6rus, Moc. et Sesse, fl. 

 mex. icon. ined. This is an anomalous species, as from the 

 stems it agrees with Cereus tuberculosus, and from the rotate 

 flowers it agrees with Opuntia. Flowers flesh-coloured. Fruit 

 white. Leaves terete, acute, soon falling off. 



Tfose-coloured Indian-fig. Shrub 2 to 3 feet. 



2 O. CYU'NDRICA (D. C. prod. 3. p. 471.) plant erect ; stem 

 and branches tubercular, areolate ; tubercles rhomboid, bearing 

 each a caducous leaf, and a few white prickles. Tj . D. S. Na- 

 tive of Peru. Flowers unknown. Cactus cylindricus, Lam. 

 diet. 1. p. 539. but not of Ort. Cereus cylindricus, Haw. syn. 

 183. 



Cylindrical-branched Indian-fig. Clt. 1799. Sh. 2 to 3 feet. 



3 O. IMBRICA'TA (D. C. prod. 3. p, 471.) plant erect, terete, 

 not furrowed, but superficially ribbed, and rather lobe-formed, 

 somewhat imbricately tesselated in various ways. T? . D. S. 

 Native country and flowers unknown. Cfereus imbricatus, Haw. 

 rev. 70. Allied to O. cylindrica, but more robust according to 

 Haworth, but according to the Prince de Salm-Dyck it is slen- 

 derer. 



/win'cate-tesseled Indian-fig. Clt. 1820. Shrub 2 to 3 feet. 



4 O. STAPE'LLE (D. C. mem. cact. in mem. mus. 17. p. 117.) 

 plant branched, irregularly tufted, deep green ; joints ovate or 

 oblong ; areolae small, tomentose in the axils of the tubercles ; 

 prickles 5-6 in a fascicle, stiff, straw-coloured, setaceous, when 

 old the epidermis or coat separates from them. Jj . D. S. Na- 

 tive of Mexico. Coulter, no. 38. Stem hardly an inch high. 

 Habit almost of Stapelia ccespilbsa, but which is without 

 prickles. 



Stapelia-like Indian-fig. Clt. 1830. Shrub 1 to 2 inches. 



5 O. EXUVIA'TA (D. C. 1. c. p. 118.) plant branched, erect, 

 nearly terete ; branches furnished with compressed tubercles, 

 and irregular crests, so as to make them nearly pentagonal ; 

 areolse orbicular, velvety at the axils of the tubercles ; prickles 

 6-12 in a fascicle, stiff, straight, when old the epidermis sepa- 

 rates from them. Tj . D. S. Native of Mexico. Coulter, no. 

 18. Cactus tunicatus, Hort. berol. ex Salm-Dyck. Trunk a 

 foot high, and 18 inches thick. 



Var. |3, angustior (D. C. 1. c.) trunk slenderer ; prickles 

 fewer; areolas narrower. Coulter, no. 17. 



Var. y, spinosior(D. C. 1. c.) stem dwarf; prickles longer and 

 more numerous, and more spine-like. 



Stripped Indian-fig. Clt. 1830. Shrub 1 foot. 



6 O. DECI'PIENS (D. C. 1. c.) plant erect, branched, green ; 

 branches cylindrical, attenuated at the base; tubercles few, 

 spirally disposed ; areolae small ; prickles of two forms, the 

 lower one large and spreadingly deflexed : the rest, 3-4' in num- 

 ber, bristle- formed and radiating. Tj . D. S. Native of Mexico. 

 Coulter, no. 20. Leaves small, ovate-oblong, deciduous. Large 

 prickle an inch long, whenold the epidermis separates from 

 it. The rest 1-2 lines long. Compare it with 0. cylindrica. 



z 2 



