306 PATAGONIAN EXPEDITIONS I BOTANY. 



3. TRISTAGMA Poepp. 



Corm globular, truncate. Leaves few, radical, linear. Scape simple, 

 leafless, bearing a few-flowered umbel, with scarious, involucral bracts. 

 Perianth salver-shaped, with a cylindrical tube and 6 subequal, spreading 

 lobes ; mostly scales in the throat. Filaments short, inserted in the throat. 

 Ovary ovoid ; seeds numerous. 



Species 3, Chili ; Patagon. 



1. T. AMEGHINOI Speg. 



Staminal series unequal. Bulb ovate, 3.5-5 mm. diameter, 3-5 cm. in 

 length. Leaves linear, plane, apically obtuse, Scape as long or shorter, 

 erect, glabrous, slender, i -flowered, 2-bracted. Flowers with rather long 

 tube, their segments narrow-linear, thickish, velvety-papillose, olivaceous. 



Patagon., in sandy meadows by Golfo de San Jorge. The cylindraceous 

 floral tube and naked throat make this resemble Brodicea ; but the short 

 style and the lobes being shorter than the tube place it in Tristagma. 



2. T. AUSTRALIS Neger. 



Bracts broad, lanceolate. Leaves obtuse, narrowing downwards. Ped- 

 icels only 2-5 mm. long. Perianth-titbe ventricose, the lobes short, linear, 

 with crown of 3-6, partly connate scales. Involucre 2-bracted, the bracts 

 connate. 



S. Patagon., Rio Guillermo. (O. Nordenskjold.) 



3. T. EREMOPHILA*Speg. 



Greenish, glabrous ; the synanthous leaves linear, obtuse, plane, equal- 

 ling or exceeding the narrower scape. Spathe basally connate-tubular, 

 long-bifid upwards, the lobes narrow, hyaline to reddish. Flowers 2-5, 

 with very short or long pedicels, erect or subcernuous ; the perigon cyl- 

 indrical to sublageniform, 6-lobed, the lobes narrow-linqar, fleshy, acutish, 

 slightly shorter than the dark-purplish tube ; olivaceous, with naked throat. 



Chubut ; in rocky hills by Carren-leofu. 



4. T. NIVALIS Poepp. 



Bracts very narrow, almost linear. Pedicels 1030 mm. long, differing 

 in the same umbel. Perianth-tiibe cylindrical. Leaves very narrow. 



