( 451 .) 
RU'PPIA * *. 
Linnean Class and Order . Tetra'ndria f. Tetragy'nia. 
Natural Order. Fluvia'lesJ, Vent. — Lindl. Syn. p. 248. ; In- 
trod. to Nat. Syst. of Bot. p. 289. — Loud. Hort. Brit. p. 541. — Mack. 
FI. Hibern. p. 264. — Naiadks, Juss. Gen. PI. p. 18. — Sm. Gram, 
of Bot. p. 66.— Hook. Brit. FI. (4th ed.) p. 423.— Najadea;, Rich, 
hy Macgilliv. p. 387. — Juncales ; sect. Nayadinae ; type, Naya- 
dace.e ; Burn. Outl. of Bot. v. i. pp. 403 and 413. — InundaTjE, 
Linn. 
Gen. Char. Flowers 2, on a spadix arising from the sheathing 
bases of the leaves (see figs. 1, 2, & 5.), which perform the office 
of a spatha. Calyx and Corolla none. Anthers (see fig. 3.) 4, 
sessile, irregularly quadrangular, depressed, bursting by a horizontal 
transverse fissure. Germens (see figs. 3 & 4.) 4, occasionally 5, 
turbinate, at length stalked (see fig. 2). Styles none. Stigmas 
blunt, depressed in the centre. Fruit (see figs. 4 & 8.) dry, egg- 
shaped, 1-seeded, crowned by the permanent stigma, and each 
elevated on a stalk, 4 or 5 times its own length. 
The solitary spadix (fig. 5.), bearing only 2 flowers , each of 
4 germens, without either calyx or corolla; and the stalked fruit ; 
will distinguish this from other genera in the same class and order. 
It has the habit of Potamogeton, but it differs from that genus in 
the want of a corolla, in the posture as well as shape of the anthers, 
and in the stalked fruit. Sm. 
One species British. 
RU'PPIA MARITIMA. Sea Ruppia. Tassel Pond-weed. Sea 
Fennel. 
Spec. Char. 
Engl. Bot. t. 136. — Ilook. FI. Lond. t. 50. — Linn. Sp. PI. p. 184. — Huds. FI. 
Angl. (2nd ed.) p. 77. — Willd. Sp. PI. v. i. pt. I. p. 717. — Sm. FI. Blit. v. i. p. 198; 
Engl. FI. v. i. p. 237. — With. (7th ed. ) v. ii. p. 260. — Gray’s Nat. Air. v. i. p. 32. — 
Hook. Brit. FI. p. 77. — Lindl. Syn. p. 251. — Macr. Man. Brit. Bot. p. 224. — Light. 
FI. Scot. v. i. p. 124. t. 8. f. 1. — Davies’s Welsh Bot. p. 18. — Relh. FI. Cant. (3rd 
edit.) p. 70. — Hook. FI. Scot. p. 59. — Grev. FI. Edin. p. 42. — Rev. G. E. Smith’s 
PI. of S. Kent, pp. 9—12. t. 1. f. 1. -FI. Devon, pp. 31 & 1 13.— Winch’s FI. of 
Northumb. and Durh. p. 11. — Murray’s Northern FI. p. 111. — Bah. Prim. FI. Sarn. 
p. 100. — Irv. Lond. FI. p. 85. — Baines’ FI. ofYorksli. p. 97 — Mack. Catal. PI. of 
Irel. p. 20. ; FI. Hibern p. 267 — Potamogeton mantimum, gramineis longi- 
oribus foliis, fructu fere umbellate, Ray s Syn. p. 134. t. 6. f. 1. — Potamogeton 
maritimum pusillum alterum, Pluk. Phyt. t. 248. f. 4. — Fucus ferulaceus. 
Johnson’s Gerarde, p. 1573. — Tassel Pond-weed, Petiv. H. Brit. t. 6. f. 1. — 
Itaccaferrea maritima, foliis aiutissimis ; etiam foliis minus acutis, Mich. 
Gen. p. 72. t. 35. 
Fig. 1. Fruit in a young state. — Fig. 2. The same, advanced to maturity. — Fig. 3. 
A single Flower. — Fig. 4. Spadix, showing ripe pedieelled Fruit in the superior 
part. — Fig. 5. Spadix of Flowers seen from its anterior side, a. the germens. — 
Fig. 6. Anther. — Fig 7. Same burst open — Fig. 8. Fruit or Nut, natural sire. — 
Fig. 9. Seed, back view of. — Fig. 10. Side view of ditto, showing its point of at- 
tachment to the Capsule. — Figs. 4 to 10, from FI. Lond. 
• So named in honour of Henry Bernard Remus, author, in 1718, of Flora 
Jenensis. 4 See fol. 46, note f. 4 See fol. 350, a. 
