346 
91. CYPERACE.E. 
3. Zannichellia Linn. 
1. Z. palustris (L.) ; style at least half as long as the nut. — 
E. B. 1844. R. vh. t. 16. — Floating. L. slender, opposite, fili- 
form. FI. axillary, sessile. Anth. 2 — 4-celled. Stigma gene- 
rally notched at the margin. Nuts very shortly stalked. — pe- 
dunculata ; cluster of fr. stalked, nuts w'ith elongated stalks. 
Z. pedunculata R. — [^Z. jjolycarpa (Nolte) is distinguished by its 
very short style scarcely a sixth of the length of the nut.]— Stag- 
nant water. A. or P. V. — VIII. Horned Pondweed. 
4. ZosTERA Linn. 
1. Z. nana (Roth); 1. linear 1-nerved, ped. filiform, nuts 
smooth. — R. vii. 2. — Plant small, scarcely 3 in. long. L. slender. 
Ped. quite as long as the inflated oblong-lanceolate spaths. I 
have seen no native specimens. — On the eastern coast? Dover. 
Mr. W. Bonder. P. ? VII. VIII. E. 
2. Z. angustifolia (R.); 1. linear 1 — 3-nerved, ped. thickened 
upwards, nuts striated. — R. vii. 3. — Plant many times larger 
than Z. nana. L. broad. Ped. slender, quite as long as the 
linear spaths, each having a bifid linear bract at its base. — Sea- 
shore. P.? VIII. IX. 
3. Z. marina (L.) ; 1. linear 3 — 5 — 7-nerved, ped. short thick, 
nuts striated. — E. B. 467. R- vii. 4. — Plant very long. L. broad. 
Ped. stout, shorter than the linear spaths. Bracts 0? — Sea- 
shore. P.? VII. VIII. 
[These plants are well deserving of study.] 
Subdivision II. GLUMACE^. 
Floral envelopes imbricated. 
Order XCI. CYPERACE.E. 
FI. perfect or unisexual, each with a scale or glume imbricated 
on a common axis. Perigone 0, or rarely membranous. Stam. 
hypogynous, definite. Anth. erect, fixed by the base, entire at 
the apex. Ovary 1 -celled, often surrounded by bristles. Style 
simple, trifid or bifid. Embryo inclosed within the base of the 
albumen. — L. with entire sheaths 
' For figures of the genera of this Order see Gen. FI. Germ. Mono- 
cotyl. vol. 2. 
