ECHINOCA'CTUS. ECHINOCA'CTUS. Invol. tubular imbricated. Cal. superior, inserted in the involuc. Cor. of many petals. Stam. numerous. Style 1; stigma many parted. Flowers bursting from the apexes of the ribs, behind the fascicules of spines.
GLOBOSI.
I. TENUISPINI.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| Ottónis Lk. | Otto's | ribs 10-12. | sp. ext. wh. centr. br. | ye. | Mexico | 1829 D.S.. |
| tenuispínus Ott. | slender.-sp. | ribs 11. | sp. ext. wh. cent. ye. br. | ye. | Brazil | 1835 D.S.. |
| Línkii Lehm. | Link's | ribs 13. | sp. ext. wh. cent. bk. | ye. | Mexico | —— D.S.. |
| corynódes Ott. | claved | ribs 16. | sp. ext. wh. cent. br. | ye. | ...... | —— D.S.. |
| *Montevidensis. | Mt. Video. | ribs 13-obt. | sp. ye. apex br. | .. | Mt. Video | —— D.S.. |
| rhodánthus | rose-fld. | ribs 13-14. | sp. ext. wh. cent. br. | ro. | ...... | —— D.S.. |
| acutanguláris HB. | acute-ang. | ribs 18. | sp. ext. wh. cent. br. | ye. | ...... | —— D.S.. |
| acuátus Ott. | sharp-rib. | ribs 13 acute | sp. ye. 10-13 | ye. | Mt. Video | 1836 D.S.. |
II. ACULEIS ERECTIS.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| pachycéntrus Lehm. | thick-sp. | ribs 12-12. obt. | sp. ye. apex br. | .. | ...... | 1836 D.S.. |
| centetérius Lehm. | awl-sp. | ribs 10 tuber. | sp. ext. 8-10. cent. 4. | li. re. | ...... | —— D.S.. |
III. ACULEIS RECURVATIS.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| sessiliflórus | sessile-fld. | stm. depr. r. 8-12 | sp. 5-6. wh. | .. | ...... | 1834 D.S.. |
| coccíneus H. Berol. | scarlet | st. dep. ribs 8-9 | sp. 8-10. br. re. | .. | ...... | 1835 D.S.. |
| spirális Karw. | spiral | st. erect. ribs 8 | sp. 8 varieg. | .. | ...... | —— D.S.. |
| recúrvus Haw. | recurved | st. glo. r. 13-15 gl. | sp. 9 ye. re. | .. | Mexico | 1796 D.S.. |
| cornígerus DC. | horn-bearg. | stm. depr. | sp. ye. rec. cent. flat. ro. | pk. | Mexico | 1820 D.S.. |
| latispinus | ||||||
| hamátus | hooked | stm. dep. ribs 21 | sp. 7. grey | .. | B. Ayres | 1833 D.S.. |
| Sellówii DC. | Sellow's | st. glo. depr. 10 | sp. 7. centr. elon. br. | .. | Mt. Video | 1826 D.S.. |
| gibbósus DC. | gibbous | stm. ov. r. 9 obt. | sp. 8-9. bk. br. | wh. | Jamaica | 1808 D.S.. |
| robústus Salm. | robust | stm. cyl. ribs 8 | sp. 8-9 ye. slend. | .. | ...... | 1835 D.S.. |
| crispátus DC. | curled | st. cyl. r. 10-12 | sp. 9-10 cent. 1. br. | .. | Mexico | 1826 D.S.. |
IV. ACULEIS SUBRECURVATIS.
| Systematic Name. | English Name. | Form of Stems, &c. | No. and Colour of Spines. | Col. of Flower. | Native Country. | Year of Introduc. |
| tuberculátus | tubercled | stm. glo. r. 8 obt. | sp. 8. ext. sp. elon. | .. | Mexico | 1826 D.S.. |
| platyacánthus | flat-spined | st. glo. r. 21-24. | sp. 7-8. cent. 4. | .. | Mexico | 1837 D.S.. |
| polyacánthus | many-sp. | st. ov. glo. r. 21 ob. | sp. 8. spread. | .. | Brazil | —— D.S.. |
| *xanthacánthus | yellow-sp. | st. depr. 11 ang. | sp. y. elong. | .. | ...... | 1835 D.S.. |