MACLOSKIE: REVISION OF FLORA PATAGONICA. 53 



ATROPIS Rupr. 



Add Mad, p. 220: . 



A. AIROIDES Hack. 



Poa airoides Nutt.; Thurb. sub Glyceria. 



Root fibrous, cespitiferous ; culm jointed from base, erect, 10-15 cm - 

 with valve and sheaths striate, glabrous ; ligule ciliolate, leaves narrow- 

 linear, plane, scabrid, 3 cm. Panicle spreading, rays irregularly in 2's, 

 3's or more: upper one solitary. Spikelets lanceolate, small; lower 

 flowers shortly pediceled ; glumes minute ; valvules 3~5-nerved, acutish ; 

 seeds oblong, rufescent, apiculate. 



S. Patagonia, Lago Argentine on watery argillaceous ground; western 

 part of the United States. Very rare, previously not noticed from Pata- 

 gonia. D. 



Add Macl., p. 221 : 



A. PRESLII Hack, subsp. BREVICULMIS Hack. Apud Skottsb. Flor. 



Feuerl., p. 7. 



Differt a typo culmo plerumque in caespite innovationum occulto (pani- 

 cula tantum exserta), toto vaginato, ligula brevi obtusa, spiculis viridibus ; 

 glumis sterilibus quam fertiles superpositae ^ brevioribus, fertilibus obtu- 

 siusculis, apice integris interdum mucronem brevissimum latum exhiben- 

 tibus, antheris minutis (0.3 mm. longis), in anthesi intra glumas retentis. 

 A subspecie pusilla differt etiam panicula condensata, spiculis contiguis 

 vel imbricatis. 



Forsitan species propia habenda? (Hackel.) 



S. Fuegia, Ushuaia; Observatory I. near Staaten I.; Falkland Ids. 



Add Macl., p. 221 : 



DACTYLIS GLOMERATA Linn. Cock's-foot Grass. 

 Panicle with secondary branches short, dense, subsecund. Spikelets 

 compressed, flowers perfect, 3-4. Glumes shorter than florets, unequal, 

 outer one keeled. Outer glumelle keeled and ciliate dorsally, 5-nerved, 

 lanceolate, a bristle near its summit enclosing the grain. 

 Falkland, introduced. 



POA L. Macl., p. 221. 

 P. ANNUA L. Macl., p. 223. 



Sown on the Beagle Canal, Fuegia, by Mr. Bridges, from English seed, 

 it has won lerfully flourished in the region, spreading over the prairies, 



