214 PATAGONIAN EXPEDITIONS: BOTANY. 



ghimes smooth, carinate, acute, as long as the 5-flowered spikelet. Floral 

 glumes smooth with long, white villi. 



This with Sieglingia antarctica and Festuca erecta make a cespitose and 

 tenaceous mass, 3 dm. deep, covering half of the Falkland Islands. 

 Patagonia, by Lago Maravilla. 



"Rachilla pilose." (F.Kurtz.) 



42. SIEGLINGIA Bernh. (Triodia^. Br.) 



Leaves narrow, and panicles contracted or open. Spikelets having 2 to 



several flowers, all perfect or the upper staminate. Glumes 5-many, the 



lowest 2 empty, shorter than the spikelets, keeled; the floral glumes not 



keeled, their 3 nerves pilose and excurrent as points. Styles short. 

 Grain dorsally compressed, enclosed but free. 



Species 30, in temperate regions ; also in trop. Amer., Afr. and 

 Austral. 



S. ANTARCTICA (Hook. f.). 



Small, densely cespitose, very leafy, glabrous ; leaves not rigid, nearly 

 equalling the culm, long-sheathed, setaceous, the margins involute. 

 Panicle spike-like ; spikelets short-pediceled, 3-flowered ; glumes sub- 

 equal, lanceolate ; floral glume broad-ovate, 5-nerved, acute, minutely 

 trifld. See note on Gynerium pilosum. 



Magell., Fuegia, Mts. of Hermite I., Falkland Is. 



43. DIPLACHNE Beauv. (or sub Leptochloa}. 



Cespitose, mostly tall, with narrow, plane leaves, and very slender 

 spikes, erect on a long axis, or rarely i terminal spike. Spikelets mostly 

 linear along the rachis, erect, subsecund, many-flowered, sessile or nearly 

 so, their rachilla articulate above the lower glumes. Flowers hermaphro- 

 dite, or the uppermost male. Empty ghimes 2, carinate, unequal, 

 i-nerved, not awned. Floral glume slightly larger, i-3-nerved, 2-toothed, 

 with a short median awn. Grain enclosed but free. 



Species 14, in warm climates. 



D. MENDOCINA (Phil. sub. 



Panic led spikes numerous, spreading with an open angle. Spikelets 

 many-flowered, distichous along the rachis. Rachilla articulate between 

 the flowers. Lower empty glume lanceolate, upper ovate, larger. Floral 



