. CACTEE. 
prickles 8 in each fascicle, 4 of which are stiff, conical, and 
greyish, or blackish, 3 very short and diverging, and 1 large and 
horizontal. h.D.S. Native of Mexico. Coulter. Largest 
prickle in each fascicle 8-10 lines long, smaller ones hardly 2 
lines long. 
Green Torch-thistle. Shrub. 
45 C. anisaca’ntuus (D. C. 1. c.) plant simple, erect, deep 
green; ribs 5-6, with the furrows and crests both acute ; fas- 
cicles of spines crowded, having the areola convex and velvety 
while young; prickles 10-20 in each fascicle, setaceous, yellowish, 
stiff, very unequal, outer ones diverging. k.D. S. Native of 
Mexico. Coulter. 
Var. a, ortholdpus (D. C. 1.c¢.) stems with 6 vertical ribs ; 
prickles 10 in each fascicle. 
Var. B, subspiralis (D. C.1. c.) stems with 5, rather spirally 
twisted ribs ; prickles 20 in each fascicle. 
Unequal-spined Torch-thistle. Shrub. 
46 Č. penratornus (D.C. 1. c. p. 117.) plant erect, greyish 
green, obtuse ; ribs 5, vertical, obtuse; fascicles of spines ap- 
proximate, having the areole velvety when young; prickles 
5-7 in a fascicle, setaceous, diverging, when young very pale 
yellow, but grey in the adult state. h. D. S. Native of 
Mexico. Dr. Coulter subjoins the 3 following varieties to this 
species, which may probably hereafter turn out as many distinct 
species. 
Var. a, simplex (D. C. 1. c.) stem simple, not rooting; ribs 
rather prominent ; furrows broad and obtuse ; prickles white. 
Var. B, subarticulatus (D. C. 1. c.) stem branched, a little arti- 
culated, but not rooting ; ribs irregular, rather repand; furrows 
narrow ; prickles yellowish while young. 
Var. y, radicans (D. C. 1. c.) stems rooting ; ribs broad, 
short; prickles yellowish while young. 
Five-crested Torch-thistle. Shrub. 
47 C. cra’yvis (Haw. suppl. p. 76.) plant large, exactly te- 
tragonal, simple, erect ; prickles usually an inch long, divaricate, 
almost interwoven among each other. kh. D. S. Native of 
Brazil. The rest unknown. 
Great-spined Torch-thistle. Clt.? Shrub 3 to 4 feet. 
48 C. reTraconus (Haw. syn. 180.) plant tall, erect, usually 
4-angled ; angles compressed. h. D. S. Native of South 
America. Cactus tetragonus, Lin. spec. p. 666. Angles plaited 
transversely (ex Spreng). Flowers white. 
Tetragonal Torch-thistle. Fl.Jul. Clt. 1710. Sh. 4 to 6 ft. 
49 C. panicuna‘tus (Lam. dict. 1. p. 540. under Cactus) 
trunk erect; branches forming a kind of panicle at the top of 
the trunk, tetragonal, articulated at the base ; spines short, in 
fascicles; petals rounded at the apex. R. D. S. Native of 
St. Domingo, in wild places.—Plum. ed. Burm. t. 192. Flowers 
white, lined with red. Fruit tubercled, yellow. Perhaps this 
species is referrible to Jamacaru prima, Marcgr. bras. p. 125. 
f. 2. but the figure given by him is too rude to determine this 
point. 
Panicled Torch-thistle. Shrub. 
50 C. Prrasa‘ya (Jacq. amer. 
erect ; branches trigonal ; spines in fascicles. h. D. S. Na- 
tive of Carthagena, in bushy places by the sea-side. Flowers 
Opening in the night, white, 8 inches long. Fruit scarlet, shin- 
ing, size and form of a hen’s egg; pulp white. Pitajaya is the 
vernacular name of the plant. 
Pitajaya Torch-thistle. Shrub. 
51 C. unpuròsus (D. C. prod. 3. p. 467.) trunk erect, very 
spiny, and is as well as the branches trigonal; spines in fascicles, 
black; limb of flowers spreading. h. D. S. Native of St. 
omingo. Plum. ed. Burm. t. 194. Cactus Pitajaya p, Lam. 
dict. 1. p. 539. Prickles 2 inches long. Flowers white, beau- 
tiful. Fruit greenish yellow, about the size and form of an 
apple; pulp white. 
151. under Céctus) trunk 
IV. Cereus. 167 
Undulated Torch-thistle. Shrub. 
52 C. opru'sus (Haw. rev. p. 70.) plant erect, pale green, 
triangular; ribs blunt; fascicles of prickles very remote ; 
prickles tawny, rising from brown tomentum : with 4 radiating 
ones in each fascicle, and a central, elongated erect one. kh. D 
S. Native country and flowers unknown. 
Blunt-angled Torch-thistle. Clt. 1820. Shrub 4 to 6 feet. 
53 C. Jamaca‘ru (D. C. prod. 3. p. 467.) plant erect; 
branches 3-4-angled; prickles in fascicles, straight ; flowers 
cylindrical, with an erect limb ; genitals inclosed. h. D. S. 
Native of Brazil. Jamacàru, Pison, hist. nat. bras. p. 100. f. 1. 
Trunk triangular, beset with spines. Flowers white, scentless. 
Fruit red, size of a goose’s egg. Perhaps Jamacàru quárta 
species Marcgr. hist. nat. bras. p. 127. f. 3. is the same or a 
distinct species. 
Jamacaru Torch-thistle. Shrub. 
54 C. va'tıpus (Haw. in phil. mag. sept. 1831. p. 418.) plant 
tetragonal, firm, glaucous at the apex, with the sides nearly flat, 
or rather convex at first, with the angles very blunt and spiny 
in the middle. h. D. S. Native of South America. Spines 
brownish. 
Strong Torch-thistle. Shrub. 
§ 2. Serpentini (from serpo, to creep; stems creeping and 
rooting). D. C. prod. 3. p. 467. Stems jointed, prostrate, root- 
ing or twining. 
* Stems with many angles. 
55 C. serpentinus (Lag. anal. sc. nat. 1801. p. 261.) plant 
creeping, flexuous, and somewhat climbing, with 11-12 very 
blunt angles ; bristles in fascicles, much longer than the wool 
from which they issue, but which at length falls off; floral tube 
very bristly at the base. Ļ. D.S. Native of South America. 
Willd. enum. suppl. 31. Link, et Otto, abbild. t. 91. D. C. 
diss. t. 12. Flowers large, beautiful; lobes bluntish; outer 
ones greenish : middle ones purplish : inner ones white. Stigmas 
7. This plant appears to hold a kind of middle station between 
the erect and creeping species of the genus, and rarely throws 
out roots from its stems. Bristles 7-8 lines long, purplish, also 
crowded at the base of the floral tube. 
Serpentine Torch-thistle. Clt.? Shrub 3 to 4 feet. 
56 C. runica'rus (Lehm. ind. sem. hort. hamb. 1827. p. 16.) 
plant erectish, articulately branched ; joints attenuated at the 
base, tubercular ; tubercles impressed at the apex, woolly and 
bearing spines ; spines coated by a somewhat diaphanous, move- 
able membrane. h. D. S. Native of Brazil. Joints terete 
when young, 14 inch long, furnished with fleshy, subulate 
leaves, which become at length deciduous. 
Coated-spined Torch-thistle. Clt.? Shrub 4 to 1 foot. 
57 C. ampicuus (Bonpl. nav. t. 36. under Cáctus) plant erect, 
with 9-12 blunt angles; bristles spinescent, longer than the 
wool from which they issue ; floral tube bearing bristles at the 
base. kh. D. S. Native country unknown. Flowers very 
like those of C. serpentinus, of which it is probably only a 
variety, differing only in the stem being more erect, and in the 
bristles being shorter. 
Ambiguous Yorch-thistle. Shrub 2 to 3 feet. 
58 C. FLAGELLIFÓRMIS (Mill. dict. ed. 8. no. 12. Haw. syn. 
158.) stems prostrate, with about 10 angles: tubercles crowded, 
bearing bristles; style rather shorter than the petals. h . D. S. 
Native of South America, and is now to be found in the Arabian 
deserts, but has been probably introduced there. Cactus flagelli- 
formis, Lin. spec. 688. Curt. bot. mag. t. 17. D. C. pl. grass. 
127. This species is very common in gardens, and has trailing 
stems, unless supported, which are therefore easily trained to any 
kind of trellissing. The flowers are so beautiful, and are pro- 
duced in such profusion, that the plant is worth being conveyed 
