Miêu tảBritannica Cyperaceae Carex riperia.png	English: Technical illustration showing different parts of the plant Carex riperia, the largest British sedge.
Ngày	1911
Nguồn gốc	Encyclopædia Britannica, 11th ed., Vol. 7, p. 693.
Tác giả	Không rõUnknown author
Giấy phép (Dùng lại tập tin)	Public domainPublic domainfalsefalse This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

Caption:

Fig. 2. — Carex riparia, the largest British sedge, from 3 to 5 ft. high. 1, Male flower of Carex; 2, female flower of Carex; 3, seed of Carex, cut lengthwise.