( 330 ) 
A'CORUS * *. 
Linncan Class and Order . Hexa'ndria f, Monogy'nia. 
Natural Order . Aroi'de.-e, Juss. Gen. PI. p. 23. — Sm. Gram, 
of B )t. p. 67. — l.indl. Svn. p. 246. ; latrod. to Nat. Syst. of Bot. 
p. 285. — Rich, by Macgilliv. p. 388. — Loud. Hort. Brit. p. 54i. — 
Mack. FI. Hibern. p. 261. — Hook. Brit. FI. (4th edit.) p. 422. — 
Juncales ; sect. Acorina: ; type, Orontiace.e ; Burn. Outl. of 
Bot. v. i. pp. 403, 408, & 409. — Piperita:, Linn. 
Gen. Char. Calyx none. Spadix naked, nearly cylindrical, 
simple, covered with sessile flowers, deciduous. Corolla ( Perian-. 
thium ) (fig. 1.) inferior, of 6, equal, blunt, concave, lax, petals, 
which are rather thicker in the upper part ; and protuberant at the 
back. Filaments (see fig. 1.) 6, thickish, upright, about the 
length of the petals, and alternate with them. Anthers terminal, 
of 2 roundish lobes. German superior, sessile, elliptic-oblong, 
the length of the stamens. Style none. Stigma hemispherical, 
obscurely 3-lobed. Capsule (figs. 2 & 3.) triangular, abrupt, 
membranous, of 3 cells, not bursting. Seeds several, egg-oblong. 
The spadix covered with numerous sessile powers ; the naked, 
inferior corolla, of 6 blunt petals ; the sessile stigma ; and the in- 
dehiscent, many-seeded capsule ; will distinguish this from other 
genera in the same class and order. 
One species British. 
A'CORUS CA'LAMUS. Common Sweet Flag. Sweet Rush. 
Myrtle Flag. Calamus Aromaticus. 
Spec. Char. Leafy summit of the scape rising high above 
the spadix. 
Engl. Bot. t. 356. — Woodv. Med. Bot. v. iii. p. 472. t. 173. — Linn. 8p. PI. p. 
462. — Huds. Fl. Angl. (2nd edit.) p. 147. — Willd. Sp. PI. v. ii. pt. 1 . p. 199. — Sra. 
FI. Brit. v. i. p. 373.; Engl. Fl. v. ii. p. 157. — With. (7th edit. ) v. ii. p. 436. — 
Lindl. Syn. p. 246. — Hook. Brit. Fl. p. 159. — Macr. Man. Brit. hot. p. 243. — 
Leers’ Fl. Herb. (2nd edit) p. 87. t. 13. f. 12. — Sibth. Fl. Oxon. p. 112. — Abb. Fl. 
lledf. p. 77. — Thorn. Fam. Herb. p. 353, with a figure. — Relh. Fl. Cant. (3rd ed.) 
p. 141. — Purt. Midi. Fl. v. iii. p. 31. — Fl. Devoft. p. 59. — Walker’s Fl. of OxL p. 
95. — Perry’s l’l. Varv. Selectas, p. 31. — Bab. Fl. Bath. p. 52. — Irv. Lond. Fl. 
p. 87. — Acorns undulatus, Gray’s Nat. Arr. v. ii. p. 159. — Acorns verus sive 
Calamus officinarum, Ray’s Syn. p. 437. — Warn. PI. Woodf. p. 2. — Acorus 
verus officials fi also Calamus, Johnson’s Gerarde, p. 62. 
Localities. — I n watery places, about lire banks of rivers, and in watery 
ditches; not common. — Oxfordsh. Near Dorchester: Dr. SiBTiioRr. Plenti- 
ful at the further end of Long Meadow, near the footpath going from Oxford to 
Iffley, 1838: W. B. — Berks; Banks of the Isis between iffley and Sandford : 
W. B . — Bedfords/i. Moat, at the Hassocks Farm. Cambridgesh. In the ditch 
opposite the great gates of Trinity College Walks. In a ditch by Great Founder’* 
Close*, near the House in the Fields. In marshy ground at Chesterton, below 
the Ferry ; nearly opposite Fen Ditton ; and above liat’s-bight Sluice.— Cheshire ; 
In the river Dee, but rare ; at Holford, near Northwich, plentifully. — Derbysh- 
Cutthorpe, near Chesterfield.— Devon , New Cut near Exeter; Hain Banks, 
Fig. 1. A separate Flower. — Figs. 2 and 3. Capsules ; from Girtrer.-tAU 
magnified. 
* From a, Gr. without ; aud korion, Or. or kore, Gr. the pupil of the eye, 
diseases of which it was supposed to remove. -f See folio 38, 
