SYSTEMATIC INDEX. 32/ 



Class GLUMIFLOR.E. 



Gramine^e. — Series EURYANTHiE. Flos sub anthesi patens; styli 

 breves, stigm. basi exserta. — A. Hordeaceae. Spicatae ! Triticum. 

 «. Cerealia. T. vulgare : tiu-gidura. b. Agropyrum. T. junceiim : 

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

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

 pratense. Leptmiis incurvatus. Lolium perenne. Brachypodium 

 silvatieum. — B. FestllcaceSB. Gluma; floie proximo breviores. a. 

 FestucecB, palese iuf. nervi convergentes omnes mediive in aristam con- 

 fluentes. Cynosurus cristatus. Dactylis glomerata. Festuca gi- 

 gantea : elatior : prateusis : loliacea : rubra : duriuscula : ovina : bro- 

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

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

 Glyceria fluitans : ])licata : maritima : rigida. Molinia cserulea. 

 Catabrosa aquatica. — C. Avenaceffi. Gluma; spiculam aequantes. 

 a. AirecB, palea iuf. dentic. Triodia decumbens. Aira caspitosa : flex- 

 uosa. An-heuatherum avenaceum. Avena. a. Anniue, panicula 

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

 entalis. c. Perennes. A. prateusis : pubescens. Airopsis caryophyl- 

 laea : praecox. Trisetum flavescens. Koeleria eristata. Holcus 

 lauatus : mollis. Melica nutans : uuiflora. — D. AgTOStldeSB. Rachi- 

 ola abortiva. a. Arundinece. Pbragmites communis, b. Agrostece. 

 Ammopbila arenaria. Calamagrostis lanceolata. Agrostis alba : vul- 

 garis. — Series CLISANTHE^E. Flos clausus, styli elongati, stig- 

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

 niculatus. Phleum pratense : arcnarium. — B. PhalandeSB. Digra- 

 pliis arundiuacea. Anthoxanthum odoratum. — C. NardeSB. Nardus 

 stricta. 



HETERONEMEiE. 



Class FILICES. 



PoLYPODiACE^. — 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-iised 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 fm-nished 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 rye. It was supposed 

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

 have shown that this wild ])lant 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 

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

 onlv outcasts, and not wild aborigines." Schouw. The Earth, Plants, and 

 Man, p. 138. 



