544 



CYir. GRAMiNEiE. \_Arrhenatherum. 



nate, awn of barren floret included within the glumes at len^rth' 

 curved glabrous except near the end, no tuft of hairs at the 

 joints, root fibrous. E. jB. t, 1169 : Parn. Gr. t. 21. 



Meadows, pastures, and woods, common, 1/.. 6,7. Much 



resembling the last in general appearance, but clothed with a softer and 

 more abundant pubescence. 



20. Arrhenatherum Beauv, Oat-like Grass. 



(Tab. VII. f. 18.) 



Panicle lax. Spihelets laterally compressed, 2-flowered, with 

 an upper rudimentary neuter one. Glumes 2, nearly equal, 

 membranaceous, as long as the florets. Lower floi^ethvivv^n^ tri- 

 androus ; glumellas 2 ; outer one with a long twisted geniculate 

 awn above the base. Uvvei 



/' 



gla-^^ 



melius 2 ; outer one with a short straight bristle below the 

 point. — Named from apprjVy male^ and a9r]p^ an awn. This genus 

 has altogether the habit oi Avena^ from which it differs iu the 

 number and structure of its florets. 



1. A. avendceum Beauv. {common Oat-like G,); leaves flat. 

 Holcus avenaceus Scop,: E. B, t, 813. Avena elatior i. 

 a. root fibrous, nodes of the culm usually glabrous. Parn, Gr. 

 t. 25. — /3. root knotted, nodes of the culm downy. Parn. Gr, 

 t. 26. 



Hedges and pastures, frequent. If.. 6, 7. — The Avena precaioria 

 of Thuill., Avena nodosa of CuUum, Arrh. hulhoaiim Dunal and Lindl,, 

 are but varieties, with a knotted or tuberous base to the culm. 



Culm 2 



3 feet high. 



Panicle long, loose. Spihelets greenish-brown. 

 The only other species of this genus is A, pallens, a Portuguese and 

 very little known plant, with convolute leaves. 



. 21. HiERocHLOE GmeL Holy-grass. (Tab. VII. f. 19.) 



■ 



Panicle mostly lax. Spihelets laterally compressed, 3-flowered, 

 without neuter florets. Glumes 2, nearly equal, membrana- 

 ceous, about as long as the spikelet. Central floret perfect, 

 diandrous; glumellas 2, permanently membranaceous. Lateral 



florets 



Caryopsis free. — Named from Ifpoc, 



sacred^ and xXoa, or x^^??, a grass : so called by Gmelin, be- 

 cause, in some parts of the Prussian dominions, it is dedicated 

 to the Virgin Mary, and strewed before the doors of the 



churches on festival-days, as the Sweet-sedge (Acorus Calamus) 

 still is at Norwich, 



1. H. boredlis R. et S. (Northern H.); panicle subsecund, 

 peduncles glabrous, florets awnless, outer glumellas ciliated at 

 the margin. Hook, in E. B. S. t. 2641 : Parn. Gr. t. 31. 

 Holcus odoratus Linn. : Sm. Hole, borealis Schrad. 



\i 



