8 MONANDRIA. TETRAGYNIA. Zannichellia. 
TETRAGYNIA. 
ZANNICHEL'LIA.* Barren and Fertile Flowers on the same 
plant; apetalous. 
Barr. FI. Cal. none. 
Fen. FI. Cal. one leaf, bell-shaped. Seeds about four. 
Z. palus'tris. (Anther four-celled: summit entire, but dilated. 
F. Bot. 1844. E .)—Mill. III.— FI Dan. 97 —Fink. 102. 7—Pet. 6. 2— 
Mich. 34. 1. 
The uncommon breadth of the summits is the most remarkable peculiarity 
in this plant; and whether they float upon the surface of the water, or 
are sunk beneath it, they are equally calculated to receive the pollen 
from the anthers which stand above them. St. The habit of Pota - 
mogeton; slender and much branched. Leaves grass-like, two, three, or 
four from the same sheathing stipulse. Seed-coats sessile, three or four, 
placed crosswise in the bosom of the leaves; somewhat compressed, with 
a toothed ridge on each side, and an awl-shaped termination, giving 
them some resemblance to a bird’s claw. Woodw. 
(Pericarps toothed on the back. Stems long, filiform, floating, branched, 
glabrous. Leaves numerous, opposite, linear, entire. Flowers small, 
axillary. Grev. Summits sometimes very slightly indented. E.) 
Horned Lakeweed or Pondweed. Ditches and stagnant waters. Ditches 
near Bungay. Mr. Woodward. (Ditches adjoining Rhyd Marsh, near 
Prestatyn, Flintshire. Mr. Griffith. In Anglesey. Welsh Bot. Between 
Form by land-mark and the sea, ten miles N. of Liverpool. Dr. Bostock. 
Tranmore pool, in the Mersey, opposite to Liverpool. Mr. Shepherd. 
Ditches near Gateshead; near Hilton Castle, Durham. Mr. Winch. 
Feckenham Moors, Worcestershire. Kinwarton and Oversley, Warwick¬ 
shire. Purton. Lochend. Mr. Neill. Grev. Edin. E.) 
A. June—July. 
(A Synoptical View of the Speciesf of Orchide^e, according to the Ar¬ 
rangement of Robert Brown , Esq. V.P.L.S. 
Or'chis M o'rio. ( Orchis Morio. Linn.) Lip three lobed, lobes scolloped, 
blunt, the middle notched at the end. Petals ascending, blunt. Spur 
conical, ascending, shorter than the germen. 
Or'chis mas'cula. (O. masculah) Lip three lobed, scolloped, blunt, the 
middle lobe bifid. Petals acute; the outer ones reflexed. Spur conical, 
ascending, as long as the germen. 
Or’chis ustula'ta. (O nstulata.) Lip with three divisions; the segments 
strap-shaped, rough with dots; the middle one bifid. Petals upright. 
* (After the eminent Venetian apothecary and naturalist, Zannichelli, who pub¬ 
lished a History of Plants, and flourished about 1702. E.) 
f For the new Generic Characters, vid. vol. i. p. 121. 
