( 164 .) 
ZAN NICHE'LL! A* *. 
Linncan Class and Order. MoNCE'ciAf, Mona'ndria. 
Natural Order. Fluvia'les, Vent. — Lindl. Syn. p. 248.; 
Introd. to Nat. Syst. of Bot. p. 289. — Loud. Hort. Brit. p. 541. — 
Naiades, Juss. Gen. PI. p. 18. — Sm. Gram, of Bot. p. 66. — 
Naiade/e, Rich, by Macgilliv. p. 387. — Juncales ; sect. Naya- 
diNjE; type, Nayadace^e; Burn. Outl. of Bot. pp. 403 &413. — 
Inundate, Linn. 
Gen. Char. Barren Flower (fig. 1.) without either calyx or 
corolla. Filament (fig. 1.) solitary, sessile, simple, upright, taller 
than the fertile flower. Anthers (see figs. 1 & 2.) egg-oblong, 
upright, of 2 or 4 parallel cells. Fertile Flower (fig. 3.) solitary, 
by the side of the barren one. Calyx (Ferianth) inferior, of 
1 small, tumid, cloven leaf. Corolla none. Germens 4 or 5, 
seldom more, nearly sessile, oblong, blunt, incurved. Style (see 
fig. 3.) 1 to each germen, terminal, simple, upright, shorter than 
the germen. Stigma (see fig. 3.) solitary, spreading, peltate, egg- 
shaped, dilated, entire or toothed. Capsules (figs. 4 & 5.) nearly 
sessile, oblong, incurved, somewhat compressed, of 1 cell and 
1 valve, not bursting ; tumid and rugged at the outer edge ; tipped 
with the permanent style. Seed (fig. 7.) solitary, of the form of 
the cell (see fig. 5.), monocotyledonous, with a very thin, simple, 
membranous skin. Embryo (see fig. 7.) central, tapering, in- 
curved. Albumen none. 
The absence of an involucrum ; the barren flower destitute of 
either calyx or corolla ; the fertile flower with a calyx of 1 sepal, 
without a corolla; the 4 or more germens; and peltate stigmas; 
will distinguish this from other genera in the same class and order. 
One species British. 
ZANNICHE'LLIA PALU'STRIS. Common Horned-pondweeeL 
Spec. Char. Anthers 4-celled. Stigmas entire. Pericarps 
toothed on the back. Hooker. 
F.ngl. Bot. t. 1844.— Linn. Sp. PI. p. 1375— Huds. FI. Angl. (2nd ed.) p. 
397. — Sm. FI. Brit. v. iii. p. 955. Engl. FI. v. iv. p. 70.— With. (7th ed.) v.ii. 
p. 8. — Gray’s Nat. Arr. v. ii. p. 32. — Lindl. Syn. p. 251. — Hook. Brit. FI. p. 385. 
— Lightf. FI. Scot. v. ii. p.534. — Sibth. FI. Oxon. p. 3.— Purt. Midi. FI. v. i. 
p.434; and v. iii. p. 381. — Helh. FI. Cantab. (3rd ed.) p.373. — Hook. FI. Scot. 
p.258. — Grev. FI. Edin. p. 187. — FI. Devon, pp. 145 A. 113. — Johnston’s FI. of 
Berw. v. i. p. 197. — Dav. Welsh Bot. p. 83. — VValk. FI. of Oxf.'p. 263. — Perry’s 
PI. Varvic. Select®, p. 74. — Rev. G. E. Smith’s PI. of S. Kent, p. 6. — Bab. FI. 
Bath. p. 48. — Mack. Catal. of PI. of Ireland, p. 77. — Aponogeton aquaticum 
graminifolium staminibus singularibus, Ray’s Syn. p. 135. 
Fig. 1. A Stamen, or Barren Flower. — Fig. 2. A transverse section of the 
Anther, showing the 4 cells. — Fig. 3. A Fertile Flower, showing its 4 germens, 
with their large flat stigmas. — Fig. 4. The Capsules. — F'ig. 5. A vertical section 
of a Capsule. — Fig. 6. A transverse section of ditto. — Fig. 7. A Seed . — All 
more or less magnified. 
* So named by Micheli, in honour of John Jerome Zannichelli, an 
eminent Venetian Apothecary and Botanist, who published a history of Plants, 
and flourished about 1702. Fie travelled with Micheli along the shores of the 
Adriatic, and was particularly versed in marine plants and animals. M autyn. 
t See Bryonia dioica, folio 83. 
