SYSTEMATIC INDEX. 327 



Class GLUMIFLORiE. 



GRAMiNEyfi. — Series EURYANTHiE. Flos sub anthesi patens; styli 

 breves, stigm. basi exserta. — A. Hordeacese. Spicatse ! Triticum. 

 a. Cerealia. T. vulgare : turgidum. b. Agropyrum. T. junceum : 

 repeus : caninum. Secale cereale. Hordeum. a. Cerealia *. H. 

 vulgare : hexastichum : distichum. b. Campestria. H. murinum : 

 pratense. Lepturus incurvatus. Lolium perenne. Brachypodiutn 

 silvaticum. — B. FestucaceSB. Glumae flore proximo breviores. ft, 

 Festucea, palea; inf. nervi convergentes omnes mediive in aristam con- 

 fluentes. Cynosurus cristatus. Dactylis glomerata. Festuca gi- 

 gantea : elatior : pratensis : loliacea : rubra : duriuscula ; ovina : bro- 

 moides. Bromus racemosus : mollis. Sehedonorus asper : sterilis. 

 Poa pratensis : compressa : trivialis : Balfourii : annua. Briza media. 

 Glyceria fluitans : plicata : maritiraa : rigida. Molinia cjerulea. 

 Catabrosa aquatica. — C. AvenaceSE. Glumse spiculam aequantes. 

 a. AirecB, palea inf. dentic. Triodia deeumbens. Au-a csespitosa : flex- 

 uosa. Arrhenatherum avenaceum. Avena. a. Annuee, panicula 

 aequalia . A. sativa : nuda : fatua. b. An. panicula secunda. A. ori- 

 entalis. c. Perennes. A. pratensis : pubeseens. Airopsis caryophyl- 

 laea : prsecox. Trisetum flavescens. Koeleria cristata. Holcus 

 lanatus : mollis. Melioa nutans : uniflora. — D. AgrostideSB. Rachi- 

 ola abortiva. a. ArundinetB. Phragmites communis, b. AgrostetE. 

 Ammophila arenaria. Calamagrostis lanceolata. Agrostis alba : vul- 

 garis. — Series CLISANTHEjE. Flos clausus, styli elongati, stig- 

 mata ex apice exserta. A. Alopecurese. Alopecurus pratensis : ge- 

 niculatus. Phleum pratense : arenarium. — B. Fhalandese. Digra- 

 phis arundinacea. Anthoxanthum odoratum. — C. KardeSB. Nardus 

 stricta. 



IIETERONEMEiE. 



Class FILICES. 



PoLYPODiACE/B. — Poly})odium vulgare : phegopteris : dryopteris. As- 

 pidium aculeatum : lobatum : angulare : thelypteris : oreopteris : 



* " It is a remarkable fact that we are still in uncertainty whether the 

 different kinds of grain still grow wild in the old world, and if so, in what 

 region this occurs. Even the authors of antiquity were at variance as to 

 whence wheat and barley, the chiefly-used grain at that time, had been de- 

 rived, and in the various statements less regard seems to have been paid 

 to actual facts, than to the fertility of the countries, and the desire to secure 

 for the native land of the writer the honour of having furnished so great a 

 gift to mankind. The same uncertainty still prevails respecting these two 

 kinds of grain, and the same is true of oats and I'ye. It was supposed 

 that the rye had been found wild upon the Caucasus, but late observations 

 have shown that this wild plant is different from the cultivated, particularly 

 in having the central stem of the ear so brittle that it cannot be threshed. 

 A wild rye is also found in Sicily, but this too has characteristics by which 

 it differs from the cultivated kind. When plants are met with, in a wild 

 condition, exactly like our kinds of grain, it is usually in places which have 

 been cultivated at a former period, and thence it is probable that they are 

 only outcasts, and not wild aborigines." Scliouw. The Earth, Plants, and 

 Man, p. 138. 



