( 480 .) 
ARRHENATHE'RUM * *. 
Linnean Class and Order. TRiA'NDRiAf, Digy'nia. 
Natural Order . Grami'ne.e, 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. Hibem. p. 294. — Hook. Brit. FI. 
(4th edit.) p. 426. — Gramina, Linn. — Graminales; sect. Ff.s- 
tucin* ; type, Avenace.e; Burn. Outl. of Bot. v. i. pp. 359 
and 369. 
Ge.w Char. Inflorescence panicled. Panicle loose. Spikelets 
(see fig. 1.) 2-flowered ; upper floret perfect, lower with stamens 
only. Calyx (fig. 2.) of 2 unequal, awnless glumes, shorter than 
the paleae, 2-flowered. Corolla (fig. 3.) of 2 unequal palese, the 
larger emarginate, of the staminiferous floret, with a twisted awn 
above the base; of the perfect floret (see fig. 3.) with a short, 
straight bristle below the point ; the smaller narrower, and awnless. 
Nectary (fig. 4.) a cloven, smooth, membranous scale. Filaments 
(see fig. 3.) 3 in each floret. Anthers notched at each end. Styles 
(see fig. 5.) short, widely spreading. Stigmas (see fig. 5.) large, 
feathery. Seed (fig. 7.) coated with the hardened, permanent 
corolla (see fig. 6). 
The loose panicle ; the 2-flowered calyx, of 2 unequal glumes ; 
the lowermost floret with stamens only, and a long twisted awn 
above the base, and the upper one perfect with a short, straight 
bristle below the point ; will distinguish this from other genera in 
the same class and order. 
One species British. 
ARRHENATHE'RUM AVENA'CEUM. Common Oat-like 
Dog -grass. Oat-like Soft-grass. 
Spec. Char. 
Arriienathr'rt.m avena'cecm, Beauvois. — Lindl. Syn. p. 305. — Hook. Brit. 
FI. p. 38. — Macr. Man. Brit Bot. p. 267. —Bab. Prim. FI. Sam. p. 108. — Dick. 
Ft. Abred. p. 23. — Irv. Loud Ft. p. 97. — Luxf. Reig. FI. p. 8 — Leight. FI. of 
Shropsh. p. 61. — Beesley’s Hist, of Banb. p. 591. — Mack. FI. Hibern. p. 302.— 
Arrhenathe rum elatius, Gray’s Nat. Arr. v. ii. p. 132. — Bab. FI. Bath. p. 57. — 
Holcus avenacens, Engl. Bot. t 813. — Knapp’s Gram. Brit. t. 39. — Greaves’ 
Brit. Grasses, t. 48. — Sm. Ft. Brit. v. i. p. 90. ; Engl. FI. v. i. p. 108. — Sibth. FI. 
Oxon. p. 40. — Thomps. PI. of Berw. p. 10. — Davies’ Welsh Bot. p. 9. — Hook. FI. 
Scot. p. 28. — Grev. FI. Edin. p. 18. — Sincl. Hort. Gram. Wob. (3rd edit.) p. 169. 
with a plate. — FI. Devon, pp. 13 & 122. — Johnst. FI. Berw. v i. p 22. — Winch’s 
FI. of Northumb. and Durh. p. 6. — Walker’s FI. of Oxf. p. 21. — Cow. FI. Guide, 
p 34. — Baines’ FI. ofYorksh. p. 119. — Gull. PI. of Banb. p. 2. —Mack. Catal. PI. 
of Irel. p. 13 . — A vena elation Linn. Sp. l’l. p. 117. — Schreb. Gram. v. i. p. 25. 
t. 1. — Curt. FI Lond. t. 191. — Leers’ FI. Herb. p. 40. t. 10. f. 4. — Iluds. FI. Angl. 
(2nd ed. ) p. 53. — Willd. Sp. PI. v. i. pt. i. p. 443. — With. (7th ed.) v. ii. p. 192. — 
Fig. 1. A Spikelet; a, the Calyx; b, the Staminiferous Floret; c, the perfect 
one. — Fig. 2. Calyx — Fig. 3. A perfect Floret. — Fig. 4. Nectary. — Fig. 5. Gcrmen, 
Styles, and Stigmas. — Fig. 6. A Ripe Floret inclosing the Seed. — Fig. 7. A Seed. — 
All a little magnified. 
* From arren, Gr. male; and other, Gr. an awn. 
t See folio 56, note -f. 
