90 



214. Phragmites communis Trin. 



vSyd.: on a rock-lcdge at Frodebo (R.). vStcrile. 



215. Poa alpina L. 



Rather common on thc hills and oftcn in low-lying regions in 

 damp ravines. Always viviparous. 



216. P. annua L. 



Common in enclosed fields and near liouscs, and on inliabited sea- 

 shores, but never far from houses. 



217. P. glauca M.Vahl; P. caesia Sm. 



Common on rock-ledges in low-ljång regions and frequcnt on 

 the hills. 



218. P. nemoralis L. f. glaiicantha Gaud. 



Rather common on rock-ledges together with the preceding and 

 sometimes not to be distinguished from it; does not, however, grow 

 far up the hills. 



219. P. pratensis L. var. hiimilis Ehrh. 



Common in low-lying regions, often found in abundance on roofs 

 of houses. 



220. P. trivialis L. 



Common in enclosures at inliabited piaces, espccially in recently 

 cultivatcd fields, but does not seem to spread bcjond the enclosed land. 



A form with pale yellow spikelets and altogcther of a light colour 

 (f. pallida!) occurred at Frodebo on Syd. mixed with normal, violet 

 specimens. 



221. Psamma arenaria (L.) R. & S. 



Onl}' found on the downs at Sands on Sando (R., !). 

 FL end of July, no fr. end of August. 



222. Sieglingia decumbens (L.) Bernh.; Triodia Beauv. 



Rather common beyond enclosed fields on peatj^ soil, occurs doubtless 

 on all the istands. 



Fr. immature in the beginning of August. 



f Triticum vulgare Vill. f. aestiim (L.). 



Accidentally introduced; Str.: on heaps of coal at Vestmanhavn (R.); 

 Vaago: solitary piants on the sea-shore at Sandevaag (!). 

 Fl. end of August. 



Order XLV. IRIDACEAE. 



223. iris Pseudacorus L. 



Mentioned by Landt as occurring at Yaag on Syd., where we also 

 found it widely dispersed in damp piaces in enclosed fields, but flowering 



