I. CYLINDRACEÆ.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| cylindrica DC. | cylindrical | st. erect cyl. tuber. | sp. wh. hairy | .. | Peru | 1799 D.S.. |
| clavarióides | batoon-like | stm. erect cyl. | sp. wh. setac. depres. | .. | ...... | 1836 D.S.. |
| decípiens DC. | deceptive | stm. erect gl. r. | sp. wh. ye. elong. | .. | ...... | 1835 D.S.. |
| imbricáta DC. | imbricated | tuber. imbricated | sp. 5-7 wh. | .. | ...... | 1826 D.S.. |
| Kleini DC. | Klein's | st. erect tuber. r. | sp. li. br. elong. | .. | ...... | 1836 D.S.. |
| leptocáulis DC. | thin-stem. | st. erect ramose | sp. small br. | .. | ...... | —— D.S.. |
| ramulífera Nob. | branching | stm. erect | sp. br. ye. arcol. crowd. | .. | Mexico | —— D.S.. |
| tunicàta | tunicated | stm. ramose | sp. 5-6 wh. & pk. | .. | ...... | —— D.S.. |
| pubescens Wend. | pubescens | stm. erect slend. | sp. wh. apex br. | .. | ...... | 1836 D.S.. |
| virgata | twiggy | st. erect ramose | sp. li. br. elong. | .. | ...... | —— D.S.. |
II. DIVARICATÆ.
Caule articulato, et articulis subcylindraceis.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| articuláta Ott. | jointed | st. erect ramose | sp. 1-wh. pelluc. | .. | ...... | —— D.S.. |
| alpína Gill. | Alpine | stm. ramose br. | sp. wh. recurv. | .. | ...... | —— D.S.. |
| stapélia DC. | stapelia | stm. ramose | sp. 4-6 wh. | .. | ...... | —— D.S.. |
| corrugáta Gill. | corrugated | br. erect cy. com. | sp. wh. apex br. | .. | Chili | 1824 D.S.. |
| dichotoma | forked | joints cyl. elong. | sp. br. apex wh. | .. | B. Ayr. | 1836 D.S.. |
| curassávica How. | Curassa | joints. cyl. com. | sp. 1-4 ye. wh. | .. | Curas. | 1690 D.S.. |
| elongáta | elongated | ...... | —— D.S.S. | |||
| andícola | joints cyl. | sp. wh. elong. | .. | ...... | —— D.S.. | |
| foliósa Haw. | leafy | jnts. comp. ramos. | sp. 1-2 elong. wh. | ye. | S. Am. | 1805 D.S.. |
| fragilis Nut. | brittle | joints cyl. obl. | sp. wh. slend. | .. | N. Am. | 1814 D.S.. |
| glomeráta Haw. | glomerated | joints cyl. | sp. flat pellucid | .. | ...... | —— D.S.. |
| exténsa | extended | joints cyl. | sp. wh. apex br. | li. ye. | ...... | —— D.S.. |
| horizontális Ott. | horizontal | jnts. cyl. ramose | sp. wh. elong. | .. | ...... | —— D.S.. |
| platyacántha | flat-spined | joints cycl. ov. | sp. wh. elong. apex bk. | ye. | ...... | —— D.S.. |
| pusílla Haw. | dwarf | jnts. divar. cyl. | sp. 1-2 twisted wh. | ye. | S. Am. | 1826 D.S.. |
| sulphúrea Gill. | sulphur-fld. | joints erect | sp. twist. ap. re. | .. | Chili | 1827 D.S.. |
| aurantiáca | orange-col. | jnts. com. elon. | sp. 3-5 br. ap. wh. y. | ye. | ...... | —— D.S.. |
| missouriénsis DC. | Missouri | joints com. ob. o. | sp. br. & wh. | ye. | Missou. | —— D.S.. |
| media Haw. | intermediat. | jnts. cyl. elong. | sp. wh. recurv. | .. | N. Am. | —— D.S.. |
| attulica | jnts. elon. cyl. | sp. wh. ye. tomen. br. | .. | ...... | —— D.S.. | |
| Sabíni | Sabine's | jnts. com. obov. | sp. wh. deflex. | .. | ...... | —— D.S.. |
| ciliósa | ciliated | jnts. com. glau. | sp. ye. br. | .. | ...... | —— D.S.. |
III. SPINOSISSIMÆ.
articulis oblongis.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| spinosíssima Haw. | very-spiny | joints obl. | sp. elong. ye. | .. | Jama. | 1732 D.S.. |
| dolabríformis | hatchet-fd. | jnts. obl. dk. gr. | sp. wh. ye. | .. | ...... | 1835 D.S.. |
| leucacántha Ott. | white-spin. | jnts. erect obl. | sp. wh. setac. ye. | wh. | S. Ame. | —— D.S.. |
| calacántha Ott. | pretty-spin. | joints obl. | sp. 5-7 wh. ye. | .. | ...... | 1836 D.S.. |
| rúbra | red-sp. | ...... —— D.S.S. | ||||
| leucotríche DC. | white-hairy | jnts. erect obl. | sp. flex. wh. elong. | .. | Mexico | —— D.S.. |
| senílis Parm. | grey | jnts. obov. obl. | sp. elon. wh. hairs wh. | .. | ...... | 1837 D.S.. |
| longíssima | longest | jnts. obl. obov. | sp. ye. elon. depr. | .. | ...... | 1835 D.S.. |
| polyántha DC. | many-fld. | joints obov. | sp. ye. setac. ye. | .. | S. Am. | 1811 D.S.. |
| polyacántha Haw. | many-sp. | joints obov. | sp. 3-4 wk. ye. | .. | N. Am. | 1814 D.S.. |
| megacántha Nob. | large-sp. | joints obov. glau. | sp. 3-5 long ones ye. | .. | Mexico | 1835 D.S.. |
| albicáns Nob. | white-sp. | jnts. obov. gl. obl. | sp. wh. ye. | .. | ...... | —— D.S.. |
| triacántha Haw. | three-sp. | joints obov. obl. | sp. wh. | .. | S. Am. | 1795 D.S.. |
| nígricans Haw. | dark | joints obl. sp. | sp. 3-5 ro. br. bk. ap. ye. | .. | ...... | —— D.S.. |
| húmilis Flaw. | dwarf | jnts. obov. obl. | sp. ye. | .. | ...... | —— D.S.. |
| lasiacántha | woolly-sp. | jnts. obov. glau. | sp. 1-4 wh. apex ye. | .. | ...... | —— D.S.. |
| Dillenii Haw. | Dillenius's | jnts. obov. gl. und. | sp. ye. | .. | S. Am. | 1810 D.S.. |
IV. SETACEÆ, OR SUBSPINESCENTES.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| microdasys Lehm. | small-hairy | joints obov. | ye. setac. dense ye. | .. | ...... | —— D.S.. |
| minor | O. pulvinata DC. | |||||
| parvúla Nob. | small | joints ellip. ob. glau. | setac. br. | .. | Chili | 1835 D.S.. |
| strícta Haw. | upright | joints obl. obov. | setac. ye. | ye. | S. Am. | 1796 D.S.. |
| tuberculáta Haw. | tubercled | joints obov. | setac. why. ye. | .. | ...... | —— D.S.. |
| vulgáris Haw. | common | joints ov. | stm. creep. setac. re. br. | ye. | S. Eur. | 1596 D.S.. |
| major | larger | |||||
| italica | Italian | joints obov. obl. | setac. short ye. | ye. | ...... | 1835 D.S.. |
| glaúca | glaucous | joints erect obov. | sp. ye. ap. br. | .. | ...... | —— D.S.. |
| decúmbens Salm. | decumbent | joints obov. compr. | arcol. dk. gr. | .. | Mexico | 1835 D.S.. |
| irrorata | H. Ber. | |||||
| cochenillífera Haw. | cochineal Fi. | joints obov. obl. | nearly unarmed | pk. | S. Am. | 1688 D.S.. |
| lanceoláta Haw. | lanceolat | jnts. obov. lanc. | sp. ye. short. setac. ye. | ye. | ...... | 1796 D.S.. |
| rubéscens Salm. | rubescent | joints elon. | red-gr. setac. wh. | .. | Brazils | 1828 D.S.. |
| tomentósa Lk. | hairy | joints lanc. comp. | sp. wh. setac. ye. | yo. | S. Am. | 1820 D.S.. |
| Mexicána | Mexican | joints obl. lanc. elon. | setac. wh. | .. | Mexico | 1835 D.S.. |
| eláta Ott. | tall | jnts. er. ob. la. a. re. | sp. 1-wh. | .. | S. Am. | 1731 D.S.. |
| Salmii | SalmDyck's | jnts. obov. ob. gl. | sp. 2-4 wh. setac. br. | .. | ...... | 1835 D.S.. |
| decumána Haw. | great-ob. | jnts. ov. obl. gl. | sp. wh. setac. ye. | .. | ...... | 1768 D.S.. |
| candelabrifórmis | candlestick-fd. | jnts. obov. ott. | sp. 1-3 wh. setac. ye. | .. | ...... | 1835 D.S.. |
| grandis | great | jnts. ellip. ob. gl. | sp. 1-wh. setac. ye. | .. | ...... | —— D.S.. |
| Americana | American | jnts. ellip. glau. | sp. 1-wh. setac. ye. | .. | Amer. | —— D.S.. |
| Amcylcea DC. | Neapolitan | jnts. ob. ellip. c. | sp. wh. | .. | Naples | 1825 D.S.. |
| Tuna Haw. | Tuna | jnts. ov. obl. | sp. elon. ye. | ye. | S. Am. | 1731 D.S.. |
| Ficus Indica | Indian Fig. | joints obl. | sp. setac. | ye. | ...... | —— D.S.. |
| crassa Haw. | thick-lobed | joints obov. obl. | glau. setac. ye. br. | ye. | Mexico | 1811 D.S.. |
| Bonplandi | Bonpland's | jnts. obov. orb. | sp. 2-5 ye. | .. | ...... | —— D.S.. |
| horrida Salm. | horrid | jnts. ob. repand. | sp. ye. | ye. | S. Am. | —— D.S.. |
| Pseudo Tuna Salm. | False Tuna | joints obov. | sp. br. ye. | ye. | ...... | —— D.S.. |
| longispina Haw. | long-spin. | jnts. ellip. ob. li. gy. | sp. 1-2 elon. gr. br. | .. | Brazil | 1825 D.S.. |
| Hitchenii | Hitchin's | jnts. ob. ellip. gl. | sp. 1-3 elon. ye. | .. | ...... | —— D.S.. |
| Parote? | jnts. obov. glau. | sp. 2-3 wh. ye. | .. | ...... | —— D.S.. | |
| spinulifera Salm. | small-spin. | joints obov. | sp. deflex. wh. ye. | .. | Mexico | 1836 D.S.. |
| dejecta Nob. | dejected | joints obl. elon. | sp. 1-3 br. ye. | ye. | Havan. | —— D.S.. |
| monacantha Haw. | single-sp. | jnts. obl. obov. | sp. 1-2 br. ye. | .. | S. Am. | —— D.S.. |
| flexibilis | flexibile | jnts. ob. orb. gl. | sp. 1-ye. | .. | ...... | 1836 D.S.. |
| sericea G. Dom. | silky | jnts. obov. glau. | sp. ye. setac. re. br. | ye. | Chili | 1827 D.S.. |
| cærulea. |
V. PARADOXEÆ. SALM.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| Braziliénsis | Brazil | jnts. com. fl. ov. | sp. 1-3 strong. | ye. | Brazils | 1816 D.S.. |
| tenuifolia | slender-leaved |