338 92. ARACEA. 
2. SparGanium Linn. 
1. S. ramoswum (Huds.) ; 1. triangular at the base with concave 
sides, st. branched, stigma linear.—E. B.744. R.ix.326.—About 
2 feet high. L. long. Fl. in spherical heads.—Ditches. P. VII. 
Branched Bur-reed. 
2. S. simplew (Huds.) ; 1. triangular at the base with flat sides, 
st. simple, stigma linear —E.B.745. R. ix. 325,—About 1 foot 
high. St. not branched but the lower heads of fl. are stalked. 
—Ditches. P. VII. Simple Bur-reed. 
3. S. natans (L.); st. simple flaccid, floating 1. very long linear 
from a dilated sheathing base, heads many scattered, male heads 
several sessile, fr. stalked oblong not longer than its subulate beak. 
—S. afine Schn., R.ix.417.—St. much thicker than in the next 
plant. L. grass-green, very long. Male heads fewer in our 
plant than m the Swedish. See Fries Summa 559.—In lakes. 
Island of N. Uist ; and Galloway ; Scotland. Snowdon. P. VII. 
E.S. 
4. S. minimum (Fr.) ; st. simple flaccid, 1. lmear floating blunt 
not enlarged at the base, heads few, only 1 male head, fr. sessile 
ovate shortly beaked.—S. natans Sm., £. B. 273. RB. ix. 324. 
—St. slender. L. pale, pellucid, long —Lakes and ditches. P. 
VIL. Vill. 
Order XCIT. ARACEA. 
Fl. moncecious or perfect, placed on a spadix and usually in 
a spath. Barren and fertile fl. usually on different parts of the 
spadix. Perianth none, or of 4—S scales. Stam. many or de- 
finite. Anth. turned outwards. Ovary free, with 1] or more cells. 
Stigma sessile. Fr. succulent. Embryo slit on one side. 
.. Acorus. Spath 0. Fi. on a sessile spadix. Perianth 
u-leaved, inferior, persistent. Stam. 6, filiform. 
2. Arum. Spath convolute at the base. Perianth 0. Male 
fl. of 1 sessile 2-celled anther. Fem. fl. placed lower, of | 
pistil. Top of spadix naked. Fy. succulent. 
1. Acorus Linn. 
1. A. Calamus (L.); scape with a long leaflike prolongation 
beyond the spadix.—E. B, 356. R. x. 429.—St. 5—6 feet high, 
resembling the ]., swordshaped, flattened. Spadix completely 
covered by the flowers, 2—3 in. long, lateral. St. and 1. sweet- 
scented when crushed.—In water, rare; more common in Norf. 
and Suff. P. VI. Sweet-flag. E. 8. 
