312 PATAGONIAN EXPEDITIONS: BOTANY. 



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exceeding the involucre, naked. Outer tepals obovate-spatulate, not 

 emarginate, serrulate, pink, their base and center white ; the inner larger, 

 purple-lined, yellow in the center; the lowest shorter, spotless. 

 (Amer.); Patagon., Chubut, in dry sandy hills. 



3. A. LIGTU Linn. 



Scape 45-60 cm. Leaves 20-30, thin, ascending, linear or lanceolate, 

 5-7 cm. long, .5-1 mm. broad. Umbel 3-8-rayed, rays often forked, 

 5-7 cm. long ; bracts several, linear, 25-35 mm. long. Perianth 35 mm. 

 long; the outer segments obovate, unguiculate, obtuse or cuspidate, 12 

 mm. broad, whitish or pale lilac or pale red, with oblique, purple streaks, 

 the inner segments narrower and more acute. Stamens shorter than the 

 segments. 



Patagon., meadows near Lago Nahuel-huapi ; along Rio Chubut. 



4. A. PATAGONICA Phil. 



Low, i -flowered. Leaves linear, narrowed at base, acute, undulate. 

 Flower 18 mm. long, its outer leaves spatulate, mucronate, yellow inside, 

 pinkish halfway on outside ; inner perianth-leaves narrower, purple-spotted 

 to the middle. Stigmas revolute, elongate, broad, margined. Leaves more 

 numerous and narrower than A. Pygmcea, and inner tepals red-spotted. 



Near Lago Sta. Cruz, Patagon. ; S. Patagon., on high dry pampas 

 near Coy Inlet (Hatcher) ; "yellow, with dark spots on the corolla." 



5. A. PYGM^EA Willd. (A. ligtu Pygmcea O. Ktze.) 



Underground stem 5-10 cm. long, sending up a dense tuft of linear or 

 lanceolate leaves, 12-25 mm - \ on g- Flower solitary, sessile amid the 

 leaves ; its perianth-leaves oblanceolate, unguiculate, whitish, unspotted, 

 1 2- 1 8 mm. long, 2-3 mm. broad. Stamens as long. " Flower unspotted." 



(Peru and Bolivia to 4,000 meters) ; Gregory Bay, Fuegia, by R. O. 

 Cunningham ; N. Fuegia, near sea-coast, Dusen. 



Family 20. IRIDACE^E. Iris Family. 



Perennial herbs, with narrow mostly equitant, distichous leaves, and 

 perfect, mostly regular, showy flowers in spathes. Perianth 6-parted, in 

 2 series, its tube adhering to the inferior 3-locular ovary. Stamens 3, on 

 the base of the outer tepals ; anthers extrorse. Style 3-cleft, its branches 



