1908] HOLM—ALPINE GRAMINEAE 429 
In the Alps of Switzerland the tribe Festuceae is the best repre- 
sented, according to Heer.’ There are four species of Festuca 
(F. ovina L., F. pumila All., F. pilosa Hall. fil., and F. Halleri Vill.) 
and five of Poa (P. alpina L., P. caesia Sm., P. laxa Hnke., P. minor 
Gaud., and P. annua L.). Koeleria hirsuta Gaud., Sesleria coerulea 
L., and SS. disticha Pers. also are present. Four Aveneae occur 
here (Avena distichophylla Vill., A. versicolor Vill., Deschampsia 
caespitosa Beauv., and Trisetum subspicatum Beauv.); two small 
species of Agrostis (A. rupestris All. and A. alpina Scop.) represent, 
with Phleum alpinum L., the Agrostideae; while Nardus stricta L. is 
the only member of Hordeae, observed so far, in'these regions. Of 
these species Sesleria disticha and Poa laxa have been recorded from 
the highest elevation (3000). 
In the Pyrenees‘ the genera are about the same, with the addition 
of Holcus caespitosus Boiss. (Aveneae), Molinia coerulea Moench., 
and Nardurus Lachenalii Godr. (Festuceae).. The Festuceae are 
here also best represented, numbering 17 species, among which the 
following are known also from Switzerland: Sesleria disticha, Festuca 
Halleri, F. pumila, Poa laxa, P. caesia, P. minor, and P. alpina. 
Among the Agrostideae, Agrostis rupestris and A. alpina are here 
accompanied by three other species: A. setacea Curt., A. mevadensis 
Boiss., and A. capillaris L., while Phleum alpinum is only known 
from the subalpine region of these mountains. The Aveneae are 
Tepresented by Deschampsia flexuosa, while D. caespitosa occurs only 
at lower elevations; also by Avena albinervis Boiss., A. Scheuch- 
zerti All., Holcus caespitosus Boiss., Trisetum flavescens Beauv., fT; 
velutinum Boiss., T. glaciale Boiss., and T. Gaudinianum Boiss., 
while 7. subs picatum does not reach the alpine region in these moun- 
tains. The Hordeae are also here only represented by Nardus stricta, 
In the mountains of Norway’ the alpine Gramineae number only 
8 species: Phleum alpinum, Aira alpina L., Trisetum subspicatum, 
Catabrosa algida F r., Poa laxa, P. stricta Lindeb., P. flexuosa Wahl., 
and P. alpina, all of which extend to the arctic region. 
* HEER, O., Ueber die nivale Flora der Schweitz. 1883. 
4D. Mariano pet Amo y Mora, Flora Fanerogdmica de la Peninsula Iberica. 
Granada 1:2. 1871. 
‘Biyrr, M. N., Norges Flora. Christiania. 1861. 
