TYPIIA. SPARGANIUM. 
.‘{39 
Suborder III. LEMNE.*!. 
Perianth 0. FI. 2, monoecious, in a membranous S])atb. 
5. Lemna. S))atb 2-flo\vered, membranous, urceolate. Male 
ll. of 2 stamens. Fr. utricular, indehiscent. — Fronds vvitb- 
out distinct stem or leaves. FI. from just beneath the mar- 
gin of the frond. 
Suborder I. Typhinem. 
1. Typiia 
1. T. latifolia (L.); 1. linear nearly flat, sterile and fertile cat- 
kins contiguous. — E. B. 1455. — St. 6—7 feet high. L. over- 
topping the inflorescence, very broad. Catkins very long. Style 
longer than the set® ; stig. oblique, linear-subulate rounded be- 
low. — [In T. ShuttlewortJiii (Koch) the stig. does not protrude 
beyond the set®.] — Ponds and lakes. P. VI. VII. Great Reed ■ 
mace. 
2. T. angustifolia (L.); 1. linear channeled below', sterile and 
fertile catkins a little separated from each other. — E. B. 1456. — 
St. 5 — 6 feet high,* much slenderer than in the preceding. L. very 
narrow, overtopping the inflorescence. Catkins very long, slender, 
separated by an interval of about an inch. Style longer than the 
set® ; stig. elongate, filiform. — Lakes and ponds. P. VI. VII. 
Lesser Reed-mace. 
[3. T. minor (Sm.); 1. linear-setaceous overtopped by the 
distant catkins. — E. B. 1457. — Reported to have been found on 
I Hounslow Heath. Dillenius. P. VII.] E 
2. Sparganium Lmn . 
1. S. ramosum (Huds.) ; 1. triangular at the base with concave 
sides, st. branched, stigma linear. — E. B. 744. — About 2 feet 
high. L. long. FI. in spherical heads.— Ditches. P. VII. 
Branched Bur-reed. 
2. S. simplex (Huds.) ; 1. triangular at the base with flat sides, 
st. simple, stigma linear. — E. B. 745. — About 1 foot high. St., 
not branched but the low'er heads of fl. are stalked. — Ditches. 
P. VII. Simple Bur-reed. 
3. S. natans (L.); 1. floating flat, st. simple, stigma oblong . — 
E. B. 273. — St. often very long, floating. L. very long, pellucid. 
Heads of fl. few, barren head usually solitary. — Lakes and. 
ditches. P. VII. VIII. 
Q 2. 
