CACTE.E. IV. CEREUS. 



Bertol. viricl. bon. 1824. p. 4. Bradl. succ. t. 12. Lob. icon. 

 2. p. 25. Mor. oxon. sect. 17. t. 37. Like C. hexagonus, but 

 differs in being clothed with glaucous bloom. 



Var. /3, monstrbsus (Salm-Dyck, 1. c.) ribs nearly obliterated ; 

 fascicles of prickles spirally confluent. 



Peruvian Torch thistle. Fl. Aug. Clt. 1728. Tr. 20 feet. 



12 C. HEPTAGONUS (Haw. syn. 178.) plant erect, oblong, 7- 

 angled. fj . D. S. Native of South America. Cactus hetero- 

 gonus, Lin. spec. 666. hort. cliff. 181. The plant is said by 

 Linnaeus to be 1-2 feet high. Perhaps distinct from C. hexago- 

 nus and C. striatus. Flowers white. 



Seven-angled Torch-thistle. Fl. Jul. Clt. 1728. Sh. 1 to 2 ft. 



13 C. GRANDISPINUS (Haw. in phil. mag. feb. 1830. p. 111.) 

 plant 8-angled ; prickles nearly 3 inches long ; flowers campa- 

 nulate, without a tube ; fruit globose, spiny. Tj . D. S. Native 

 of St. Domingo. Plum. amer. t. 195. f. 2. Large, bluntly 

 angled. Spines subulate, 12-13 in a fascicle. Petals obtuse, 

 lanceolate, serrated. 



Great-spined Torch-thistle. Shrub large. 



14 C. SERRULIFLORUS (Haw. 1. c.) plant 8-angled ; bristles 

 half an inch long ; petals 5-times shorter than the tube ; fruit 

 rather conical, large, scaly, unarmed. Tj . D. S. Native of St. 

 Domingo. Plum. amer. t. 195. f. 1. Large, bluntly angled. 

 Bristles about 20 in each fascicle ; fascicles remote. Petals 

 narrow, lanceolate, serrulate, hardly an inch long, but the tube 

 is 4| inches long, and scaly. Very like C. hexagonus, but the 

 spines are more numerous, longer, and slenderer. 



Serrulated- petalled Torch-thistle. Shrub large. 



15 C. MONOCLONOS (D. C. prod. 3. p. 464.) plant tall, erect, 

 with 8 angles ; angles blunt, compressed; spines stellate, nearly 

 equal ; petals emarginate at the apex. (7 . D. S. Native of 

 the Caribbee Islands. Plum. ed. Burm. t. 191. exclusive of the 

 synonymes. Plumier has himself made his plant the same as 

 C. Peruvianus, but by Linnaeus it has been referred to C. hexa- 

 gonus, but it differs from both these species, in the petals being 

 bluntly emarginate at the apex, and nearly obcordate. Limb of 

 flower spreading. Style exserted ; stigma 5-cleft. The name 

 is derived from fiofoe, monos, alone, and KA.OVOC, klonos, a noise ; 

 but the application is not evident to us. 



Con/used Torch-thistle. Shrub 20 feet. 



16 C. FIMBRIA'TUS (Lam. diet. 1. p. 539. under Ctictus) plant 

 tall, erect, bluntly 8-angled ; prickles setaceous, white ; flowers 

 with a short tube ; petals fringed. Tj . D. S. Native of St. 

 Domingo, in arid woods. Plum. ed. Burm. t. 195. f. 1. Stem 

 the thickness of a man's leg, and about 18-25 feet high. Flowers 

 rose-coloured, campanulate, with few petals. Stamens very 

 numerous ; stigma multifid. Fruit globose, red, size of an 

 orange, beset with prickly tubercles ; flesh red. 



Fringed-petalled Torch-thistle. Shrub 18 to 25 feet. 



17 C. HY'STRIX (Salm-Dyck. in litt. ex D. C. prod. 3. p. 464.) 

 plant erect, green, shining, 9-angled ; ribs rather compressed ; 

 prickles rising from grey tomentum, with 9 radiating ones, 2^ 

 small upper ones, and 3-4 strong, central ones, which are painted 

 with white and brown. Tj . D. S. Native of South America ? 

 Cactus hystrix, Salm-Dyck. obs. bot. 1822. Old prickles grey, 

 blackish at the apex. This is different from Cactus Ice'lus of 

 H. B. et Kunth, and from C. hystrix, Haw. 



Porcupine Torch-thistle. Shrub. 



18 C. FE'ROX (Haw. in phil. mag. 1830. feb. p. 107.) plant 

 oblong, nearly terete ; with usually 8 ribs ; spines divaricate, 

 brown, dense. Tj . D. S. Native of Brazil. Plant firm, green, 

 thickly beset with horned spines, and of these there are usually 

 6 outer radiating ones, 4-5 middle ones, and 1 long central one 

 in each fascicle. 



Fierce Torch-thistle. Clt. 1827. Shrub 1 foot. 



19 C. GRISEUS (Haw. syn. 182.) plant erect, longish, usually 

 8-angled, deeply furrowed, branched at the base ; prickles when 



165 



old half an inch long, white, but tipped with black. 1? . D. S. 

 Native of South America. The rest unknown. 



GVey-spined Torch-thistle. Clt. 1809. Shrub 3 to 4 feet. 



20 C. CRENULA'TUS (Salm-Dyck, obs. bot. 1822.) plant erect, 

 greyish green, with 8-9 angles ; ribs blunt, crenulated ; prickles 

 white, rising from grey tomentum, blackish at the apex, 9 in 

 eacli fascicle, radiating and equal, and 1 long central one. J; . 

 D. S. Native of South America. C. Royeni, Willd. suppl. 

 enum. p. 32. Stem rather woolly at the apex ; wool grey, at 

 length falling off. 



Var. ft ; plant rather slenderer than the species ; and the 

 prickles are shorter. Salm-Dyck, in litt. 



Crenulated Torch-thistle. Clt. 1728. Shrub 2 to 3 feet. 



21 C. CINERA'SCENS (D. C. mem. cact. in mem. mus. 17. p. 

 1 1 6.) plant simple, erect, greyish green ; with 8 blunt tubercular 

 ribs, and narrow recesses ; areolae while young convex and vel- 

 vety ; prickles 14 in each fascicle, white, setaceous, stiff, outer 



10 radiating, central 4 erectly diverging, and longer than the 

 ray ones, fj . D. S. Native of Mexico. Coulter, no. 23. 

 Stem 6 inches high, and 2 inches in diameter. Outer prickles 

 6-9 lines long : central ones 12 lines long; in fascicles, which 

 are 5-6 lines distant from each other. 



Var. ft, crdssior (D. C. 1. c.) stem thicker ; fascicles of spines 

 more distant. 



Var. /, tenuior (D. C. 1. c.) stems slenderer ; ribs more ap- 

 proximate. Very like C. pentalbphus, but differs in being 8- 

 angled, not 5-angled. 



Greyish Torch-thistle. Clt. 1830. Shrub foot. 



22 C. CALVE'SCENS(D. C.I. c.) plant simple.or a little branched 

 at the apex, erect, green, obtuse, and rather utnbilicate at the 

 apex, with 7-8 vertical, obtuse ribs, and acute furrows ; areolae, 

 while young, convex and tomentose, but at length becoming 

 nearly glabrous ; prickles 8-9 in each fascicle, brown, stiff, di- 

 verging : the central ones hardly to be distinguished from the 

 outer ones. Jj.D. S. Native of Mexico. Coulter. Very like C'. 

 Peruvianus. Fascicles of spines 6-9 lines distant from each other. 



Cahescent Torch-thistle. Shrub 8 to 10 feet ? 



23 C. MARGINA'TUS (D. C. 1. c.) plant simple, or a little 

 branched at the apex, erect, green, obtuse at the tip : with 7 

 vertical ribs, and acute recesses ; crests obtuse, woolly their 

 whole length from white tomentum, in consequence of the oval 

 areolae being confluent ; prickles 7-9 in a fascicle, stiff, grey, 

 short : with the central ones hardly to be distinguished from the 

 ray ones. \i . D. S. Native of Mexico. Coulter, no. 13. 

 Stem 2-| and 3 inches in diameter. Prickles 1-2 lines long. A 

 very distinct species. 



Margined Torch-thistle. Shrub. 



24 C. ALBISH'NUS (Salm-Dyck, obs. bot. 1822.) plant erect, 

 greyish green, with 9 or 10 angles; ribs obtuse, very prickly; 

 prickles grey, tipped with yellow, rising from grey tomentum, 



11 radiating ones and 4 central in each fascicle. fj . D. S. 

 Native of South America. Very like C. crenuldtus, but more 

 slender and more woolly. Old plant only woolly at the apex, 

 but the young plant all over ; the wool grey. Salm-Dyck, in litt. 



White-spined Torch-thistle. Shrub 2 to 3 feet. 



25 C. REGA'LIS (Haw. suppl. p. 75.) plant erect, 9-angled, 

 furrowed ; spines fulvous, elongated, when young about equal in 

 length to the wool, fy . D. S. Native of South America. 

 Fascicles of spines much crowded. 



Royal Torch- thistle. Clt.? Shrub 10 feet. 



26 C. STRICTUS (Willd. enum. suppl. p. 32. under Cactus,) 

 plant erect, areen, shining, 7- 9-angled ; ribs rather compressed 

 repand ; prickles brown, rising from brown tomentum : each 

 fascicle composed of 8 radiating ones, a small superior one, and 

 3 central ones, which are much longer than the rest. fj . D. S. 

 Native of South America. There is hardly any wool at the top 

 of the stem ; the rest unknown. Salm-Dyck. in litt. 



