| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| oxygonus Ott. | furrowed | ribs 13-15. | sp. ext. wh. cent. br. | pk. | Brazil | 1829 D.S.. |
| Echin. sulcatus. Hort. | Eyries's. | |||||
| Eyriesii Turp. | ribs 16. | sp. bk. toment. short. | wh. gr. | ...... | —— D.S.. | |
| Echin. Eyriesi. | ||||||
| turbinátus Pfr. | turbinated | ribs 16. | sp. ext. wh. cent. br. | .. | ...... | 1835 D.S.. |
| Echin. turbinatus Hort. | ||||||
| multiplex Ott. | many-fold. | ribs 13. | sp. ye. apex br. | ca. sc. | ...... | 1830 D.S.. |
| Echin. multiplex | ||||||
| leucánthus Gill. | white | ribs 8-9. | sp. br. recurv. | wh. pu. | ...... | —— D.S.. |
| Echin. ambiguus hort. Melocact. ambiguus. Ht. | ||||||
| tubiflórus Pfr. | tube-fld. | ribs 12. | sp. 7-9. ye. ba & ap. bk. | wh. | ...... | —— D.S.. |
| Echin. tubiflorus Hort. |
II. MACRACANTHI.
Caule erecto subobovato.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| candicans | white | 9-an. ribs obt. | sp. 12-15 br. ye. | .. | ...... | —— D.S.. |
| macracánthus | large-sp. | 9-an. ribs obt. | sp. 12-14 br. ye. | .. | ...... | —— D.S.. |
| ochroleúcus | ochre-col. | 12-an. r. obt. | sp. br. apex bk. | och. | ...... | 1835 D.S.. |
| Chiloénsis Colla | Chilœ | 10-an. r. obt. | sp. 12-16. ye. br. | .. | Chili | 1825 D.S.. |
| fl.-luteo. | yellow-flo. | ye | ——— | 1835 D.S.. | ||
| Chiloensóides | chilo.-like | 10-an. r. obt. | sp. 10 br. pelluc. | .. | ——— | .... D.S.. |
III. CAPILLARES.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| sénilis Haw. | grey-headed | ribs 20-25 | sp. elong. wh. hairs elon. | re. | Mexico | 1823 D.S.. |
IV. LANUGINOSI.
Caule 9-11-angulari erecto.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| lanuginósus L. | woolly | 9-ang. gl. | sp. ye. elong. | wh. | W. Indies | 1699 D.S.. |
| Royéni Haw. | Royen's. | 9-ang. glauc. | sp. slen. ye. br. | wh. | S. Amer. | 1728 D.S.. |
| gloriosis Salm. |
V. SUBLANUGINOSI.
Caule 5-10-angulari erecto.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| albispínus Salm. | white sp. | 9-10-an. r. obt | sp. wh. apex ye. | .. | S. Amer. | .... D.S.. |
| crenulátus Salm. | crenulated | 9-ang. cren. | sp. wh. apex ye. | .. | W. Indies | 1822 D.S.. |
| gracilior Salm. | slender | 9-10-ang. | sp. wh. apex bk. | .. | ...... | 1835 D.S.. |
| nígricans | dark | 8-an. rib. den. | sp. 10-12 br. | .. | ...... | 1835 D.S.. |
| níger Salm. | black | 7-an. r. compr. | sp. 9-12 ye. | .. | S. Amer | .... D.S.. |
| Hawórthii D.C. | Haworth's | 5-ang. r. obt. | sp. 9-10 br. | .. | Caribees | 1811 D.S.. |
| flavispínus Haw. | yellow-sp. | 7-10-an. ri. ob. | sp. 11-13 ye. | .. | W. Indies | 1822 D.S.. |
| fulvispinósus Ha. | tawney-sp. | 9-an. sulca. | sp. br. thick | .. | S. Amer. | 1795 D.S.. |
| *Russelliánus | Duke of Bed. | 6-7-ang. cren. | sp. bk. short. cen. 1 ang. | .. | Demarara | 1836 D.S.. |
VI. GLABRI.
Caule 4-10-angulari erecto.