MACLOSKIE : GRAMINE/E. 225 



P. BERGII CHUBUTENSIS Speg. 



Differs from the species by lower stature, 3-nerved glumes, 5(-y)-nerved 

 Palece and spikelets scarcely 9-1 1 mm. long. 



N. Patagon., Chubut, common in dry meadows by Cabo Raso. 



6. P. BONARIENSIS (Lam. sub Festucd] Kunth. 



Culms slender, 60-90 cm. tall, weak, glabrous; leaves long, filiform, 

 glaucescent, hairy at the opening of the sheaths. Panicle oblong, shin- 

 ing, its rays appressed. Spikelets compressed, 3-flowered ; glumes acute, 

 subvillous. 



(Argentina) ; S. Patagon., N. and E. Fuegia. (Dusen.) In sandy 

 places. 



7. P. CHILENSIS Trin. 



(Dioicopoa. Dioecious, but the sexes not otherwise differentiated.) Root 

 fibrous, often stoloniferous. Culm 20-45 cm - ta ^- Leaves convolute, 

 the lower plane, 25 cm., the ligules somewhat produced. Panicle com- 

 pact or lobed, its rays in 3's or 5's, spiculiferous from the base. Spikelets 

 3-flowered, short-pediceled ; flowers obscurely nerved, lanceolate, acutish. 

 Puerto Madryn ; (Chili). 



8. P. CHUBUTENSIS Speg. 



Dioecious. Robust, densely cespitose, green-glaucescent. Leaves pli- 

 cate, with scabrid margins, callous-mucronate and pungent; ligules 

 short, truncate, scarious. Panicle large, secund, at length nutant; rachis 

 not scabrous ; rays not scabrous, naked below, above their middle spar- 

 ingly branching and densely spiculiferous. Pedicels short; spikelets 

 2-flowered, lanceolate ; glumes obtusely keeled, not rough, i- and 3-nerved. 

 Flowers carinate, dorsally scabrid ; lower floriglume 5-nerved, submucro- 

 nate ; palea as long, hyaline. Squanmlce rather large, basally villous, the 

 upper with a short, smooth pedicel. (Only female specimens seen.) 



Chubut, in rocky elevations near Teka-choique. 



9. P. COMMERSONI Franchet. 



Cespitose, glabrous. Cttlms to 30 cm. tall, erect, apex scabrid. Leaves 

 convolute, strict, rough-margined, striate. Panicle crowded, oblong, with 



