SUPPLEMENT 
FERNS AND FERN-ALLIES. 
Er JOHN E. SOWEKBY. 
Order CVIL EQUISETACEiE. 
Genus 1. Equisetum. 
E. aryense. Field Horse-tail. Fig. 1701. 
Fertile stems unbranched ; sheaths distant, loose. Sterile stems with 
12-14 striae. Moist pastures. 6 in. to 2 ft. Perenn. March. E.BA. 
2020. E.B. 2.1461. H.fyAm. 593. Bab. A. 414, 5. 415. N.77. S. 1. 
E. umbrosum. Blunt-topped Horse-tail. Fig. 1702. 
Fertile stems unbranched, sheaths appressed. Sterile stems with 
about 20 striae. Moist woods. 2 ft. Perenn. March. E.B.S.2777. 
E.B. 2. 1460. H. fy Am. 597. Bab. 4.415,5.415. N. 03. S. 2. 
E. Telmateia. Great Horse-tail. Fig. 1703. 
Sterile stems nearly smooth, with about 30 striae. Marshes and 
bogs. 3-6 ft. high. Perenn. March. E. B. 1.2022. E.B. 2.1459. 
11. Am. 597. Bab. 4.415,5.416. N.67. /S'. 3. 
E. sylvaticum. Wood Horse-tail. Fig. 1704. 
Stems with about 12 striae. Moist woods. 12-18 in. April, May. 
E.BA. 18/4. E. B. 2.1462. II. Am. 598. Ea6.4.415, 5.416. 
N. 59. S. 4. 
E. limosum. Smooth Horse-tail. Fig. 1705. 
Stems nearly smooth, with numerous slight striae. Ponds and ditches. 
2-4 ft. Perenn. July. E.B. 1.929. E. B. 2. 1463. II. fy Am. 
598. Bab. 4.415, 5. 416. AT. 51. S. 5. 
E. palustre. Marsh Horse-tail. Fig. 1706. 
Stems rough, with 6 or 8 broad prominent striae. "Watery places. 
6-18in. Perenn. July. E.B.\.292\. E.B.2A454. H.fyArn. 
598. Bab. 4.416, 5. 416. N. 43. S. 6. 
E. hyemale. Rough Horse-tail. Fig. 1707. 
Stems simple, very rough, with 14-20 striae. Damp woods. 2-3 ft. 
Aug. E. BA. 915. E. B. 2. 1465. II. fy Am. 599. Bab. 4. 416, 
5.417. N. 17. S. 8. 
E. Moorei. Moore's Equisetum. Fig. 1708. 
Stem simple, rough, with 10-14 striae. Rock field, Wicklow. 1-3 ft. 
Ann. Aug. Bab. 4. 416, 5.417. S. 12. 
E. Mackaii. Machay’s Equisetum. Fig. 1709. 
Stem erect, simple, very rough, with 8-12 striae. Sheaths close, ulti¬ 
mately wholly black. Mountain glens. 1-4 ft. Perenn. Aug. 
II. fy Am. 599. Bab. 4. 416, 5. 417. N. 24. S. 9. 
E. variegattjm. Variegated Rough Horse-tail. Fig. 1710. 
Stems decumbent, with 4-10 striae. Sandy sea-shores. 1-8 in. 
Perenn. Aug. E. B. 1. 1987. E. B. 2. 1466. II. fy Am. 599. Bab 1- 
416, 5.417. AT.31. S. U, 
