( 47 ©.) 
ROTTBO'LLIA * * 
JAnnean Class and Order . Tria'ndria f , Digy'nia. 
Natural Order. Grami'neje, Juss. Gen. PI. p. 28. — Sm. Gram, 
of Bot. p. 86.; Engl. FI. v. i. p. 71. — Lindl. Syn. p. 293.; Introd. 
to Nat. Syst. of Bot. p. 292. — Rich, by Macgilliv. p. 393. — Loud. 
Hort. Brit. p. 542. — Mack. FI. Hibern. p. 294. — Hook. Brit. FI. 
(4th ed.) p. 426 . — Gramina, Linn. — Gramina'les ; sect. Triti- 
cinas; type, Hordea'ce.e ; Burn. Out!, of Bot. v. i. pp. 359, 
and 362. 
Gen. Char. Common Receptacle { rachis ) , or main stalk, 
many-flowered, elongated, jointed, finally separable, with a channel 
in each joint (see fig. 3.), alternately disposed, to receive the spike- 
lets (see fig. 1.), which are mostly 1-flowered, seldom 2-fiowered. 
Calyx of 2 glumes, unilateral, and sometimes combined into one, 
longer than the corolla. Corolla of 2 spear-shaped, pointed, mem- 
branous, nearly equal, pale®, indexed at the edges. Nectary of 
2 acute scales. Filaments (see fig. 1.) 3, hair-like. Anthers pen- 
dulous, cloven at each end. Germen (see fig. 2.) oblong, bluntish. 
Styles 2, short. Stigmas (see fig. 2.) widely spreading, feathery. 
Seed elliptic-oblong, shut up in the cavity of each joint of the rachis, 
by the closed glumes, and falling off with it. 
The 1- or 2-flowered spikelets, imbedded in the rachis ; and the 
calyx of 2 parallel, sometimes combined, awnless glumes ; will dis- 
tinguish this from other genera, with the inflorescence in 2-sided 
spikes, in the same class and order. 
One species British. 
ROTTBO'LLIA INCURVA'TA. Bent Rottbollia. Sea Hard- 
grass. Snake-tail. 
Spec. Char. Spikes cylindrical, awl-shaped. Glumes com- 
bined below. Floret solitary. Corolla awnless. 
Engl. Bot. t. 760. — FI. Graec. v. i. p. 72. t. 91. — Knapp’s Gram. Brit. t. 103. — 
Host. Gram. Austr. v. i. p. 18. t. 23. — FI. Dan. t. 938. — Cavan. 1c. v. iii. p. 7. t. 
213. — Linn. Suppt. p. 114. — Willd. Sp. PI. v. i. pt. I. p. 463. — Sm. FI. Brit. v.i. 
p. 151.; Engl. FI. v. i. p. 175.— With. (7th cd.) v. ii. p. 201.— Hook. Brit. FL 
p. 56. — Schrad. FI. Germ. v. i. p. 410. — Davies’ Welsh Bot. p. 13. — Relh. FI. Cant. 
(3rd ed.) p. 49. — Hook. F). Scot. p. 46. — Grcv. FI. Edin. p. 33. — Rev. G. E. Smith’s 
PI. of S. Kent, p. 8. — FI. Devon, pp. 24 St 121. — Winch’s FI. of Norlhumbl. and 
Durh. p. 8. — Irv. Lond. FI. p. 102. — Baines’ FI. of Yorksh. p. 116. — Mack. Catal. 
of PI. of Irel. p. 16. ; FI. Hibern. p. 317. — Ophiurus incurvatus, Beauv. — 
Gray’s Nat. Arr. v. ii. p. 87. — Lindl. Syn. p. 295. — Lepturus incurvatus, Macr. 
Man. Brit. Bot. p. 277. — Bab. Prim. FI. Sam. p. 116. — JEgilops incurvata, Linn. 
Sp. PI. p. 1490. — Lightf. FI. Scot. v. ii. p. 632. — Gramen parvum marinum, 
spied loliaceu, John. Ger. p. 30*. n. 8. — Ray’s Syn. p. 395. — Gramen loliaceum 
rnaritimum, spicis gracilibus articulatis recurvis, Moris, v. iii. p. 182. sect. 8. 
t. 2. f. 8 . — Gramen loliaceum rnaritimum, scorpioides, Skerardi, Scheuchz. 
Agr. p. 42. t. 2. f. 1. a. b. 
Fig. 1. A Spikelet; a, (on the left-hand side,) the two, combined. Glumes; 
b, and a, (on the right-hand side,) the two Paleae. — Fig. 2. Germen, Styles, and 
Stigmas. —Fig. 3. A joint of the Rachis, showing the cavity in which the spikelet 
is embedded before and after it has flowered. 
* So named by the younger Linnievs, In memory of Christian Fries Rott- 
eoell, a Professor of Botany at Copenhagen. f See fol. 36, note rj\ 
