( 49 .) 
HIPPU'RIS* * 
Linnean Class and Order. MoNA'NDRiAf, Monogv'nia 
Natural Order. Halora'gea:. Dr. R. Brown. — Lindl. Syn. p. 
110 ; Introd. to Nat. Syst. p. 57 . — Hygrobie^:. Rich by Macgilliv. 
p. 521 . — Naiades. Juss. — Sm. Gram, of Bot. p. 66. 
Gen. Char. Calyx superior, scarcely discernable, forming a 
minute rim to the oval Germen, (figs. 1 & 2). Corolla none. 
Filament one, superior, upright, fixed within the calyx, produced 
as the anther ripens. Anther of two round lobes, at first sessile. 
Style awl-shaped, lying in a channel of the anther, (fig. 1). Stigma 
simple, pointed. Fruit (fig. 3.) a small, 1-celled, 1-seeded nut. 
Distinguished from other genera in the same class and order, by 
the very minute, superior calyx, simple stigma, and 1-seeded fruit. 
One species British. 
HIPPU'RIS VULGA'RIS. Common Mare’s Tail. 
Spec. Char. Leaves linear, many in each whorl. 
Eng.' Rot. t. 763 — Curt. FI. Lond. t.287. — Muds. FI. Angl. (2nd ed.) p. 2. — 
Sm. FI. Brit. v. i. p. 4. Engl. FI. v. i. p. 4. — With. (7th ed.) v. ii. p. 6. — Lind. 
Syn. p. 110. — Hook. Brit. FI. p. 2. — Don’s General System of Gardening and 
Botany, v. ii. p. 705. f. 104. — Gray’s Nat. Air. v. ii. p.556. — Light!. FI. Scot.- 
v. i. p. 70. — Sibth. FI. Oxon. p. 1. — Abbot’s FI. Bedf. p. 1. — Part. Midi. FI. 
v. iii. p.3. — Relh. FI. Cant. (3rd ed.) p. 2.— Hook. FI. Scot. p. 2. — Grev. FI. 
Edin. p. 1. — Mackay’s Catal. of Plants found in Ireland, p. 7. — Johnson’s Flora 
of Berwick-upon-Tweed, (1829) v. ii. p.272. — Walk. FI of Oxf. p. 1. — Limno- 
peuce, Ray’s Syn. p. 136. — Cauda equina fcemina, Johnson’s Gerarde.p. 1114. 
Localities. — In lakes, ponds, and watery ditches. — Not common. — Oxford- 
shire ; Blenheim Park ; Ensham Common ; Binsey Common : Dr. Sibthorp, 
in FI. Oxon. Ditches near the Canal between High Bridge and Hayfield’s Hut ; 
in Port Meadow ; and between Oxford and Botley : 1833. W. B. — Bedford- 
shire ; In ditches, common : Rev. C. Abbot, in FT. Bedf. — Buckinghamshire ; 
In a lake near a bridge in the Duke of Buckingham’s Park at Stow, plentiful: 
1831. W. B. — Cambridgeshire ; in ponds, ditches, marshes, and rivers: Rev. 
R. Relhan, in FI. Cant. — Cumberland ; In Old Eden, parish of Aldinghain, 
and at Low Gelt Bridge, Brampton : Mr. Hutchinson, in With. Bot. Arr. — 
Durham ; In the Skerne, near the bridge at Darlington: and at Hell Kettles : 
Rev. J. T. Fenwick, in Winch’s Botanist’s Guide through the Counties of 
Northumberland and Durham, (1805). — Gloucestershire ; A lake in Tortworth 
Park : Mr. Baker, in With. Bot. Arr. — Hampshire ; Common in streams about 
Alresford, and Winchester: Mr. W. Pamplin, jun. — Lancashire Almost 
everywhere in muddy ditches in the N. W. part of the county : Mr. Hall. At 
Bootle, and in ditches about F’ormby, near Liveipool : Dr. Bostock, in With, 
F’ig. 1. A Flower in a young state, showing the Stamen, the Germen, and the 
Style. — Fig. 2. The same in a more advanced state. — F ig. 3. The F’ruit. — Fig. 4. 
A transverse slice of the Stem, showing the large Air Cells. — All, more or less, 
magnified. 
* From Ippos, Gr. a horse, and oura, Gr. a tail ; from afancied resemblance 
in its mode of growth. Withering. 
t From monos, Gr. one, and aner, Gr. The first of the twenty-four classes 
of the Artificial System of Linnif.us : it comprehends all those plants which 
produce perfect flowers, (i. e. flowers which have each of them one or more 
stamens and pistils,) with only one stamen in each. 
I “ From monos, Gr. one, and gune ; here made applicable to the. pistil, or 
style, an essential part of the pistil ; or, when the style is so short as not to be 
visible, the stigmas are counted. The student will do well to bear in mind the 
meaning of the names applied to the Linnean Classes and Orders, for they are 
beautifully expressive of their essential characters.” Dr. Hoorer. 
