40 PATAGONIAN EXPEDITIONS: BOTANY. 



denticulate-carinate ; fertile glume a little shorter than the empty glumes, 

 excepting the pilose callus, glabrous, 5-nerved, the medial nerve evan- 

 escent near the end, truncate, 4-mucronulate ; palea very small, rotundate. 

 Near to Agrostis montevidensis Spr., which differs by larger flowers, 

 larger awn, glabrous callus and acute fertile glume. D. 



Add to Macl., p. 189: 



AGROSTIS MAGELLANICA Lam. var. COGNATA Steud. 

 Syn. Agrostis cognata Steud. (in Macl., p. 156). 



Magellan. 



According to Steud. Syn. Glum., I, pp. 421-422, A. cognata is closely 

 allied to and, may be, separated only as a variety from A. magellanica. 

 Steudel says it differs from the last named species by "valvula solitaria" 

 and my examination of a specimen in Stockholm Herbarium of A. cognata 

 numbered 1 123 in W. Lechler Plantce Magellanica confirms his statement- 



In outer appearance A. cognata coincides with A. magellanica, and the 

 only difference between them is that the latter has a rudimentary palea, 

 whilst A. cognata has none at all. This slight disparity is not sufficient 

 for separating them specifically, and I, therefore, place A. cognata as a 

 variety of A. magellanica. D. 



Add Macl., p. 192: 



A. VULGARIS With. 



Root fibrous, subrepent, with capillary fibres. Culm erect, 30-90 cm., 

 leafy, the leaves narrow, acute, long-sheathed, ligule short, erose, muticous. 

 Panicle erect, spreading, semiverticillate ; rays divaricate, flexuous di-tri- 

 chotomous ; glumes subequal, lanceolate, acute, purplish ; valvules whitish, 

 outer as long as glume, inner half as long, and awned. 



Magellan, Punta Arenas; Falkland Is., Port Stanley. Certainly not 

 indigenous. D. 



Add Macl., p. 189: 



A. MONTEVIDENSIS Spr. var. SUBMUTICA Doell. in Flora Bras., 



Fasc. 79, p. 22. 



Root fibrous; culms numerous, ascending, 30-45 cm., simple or below 

 floriferous, branching, with glabrous nodes, and the sheaths exceeding the 

 internodes. Lower leaves filiformly involute ; upper leaves flat. Panicle 



