35 2 PATAGONIAN EXPEDITIONS I BOTANY. 



3. POLYGONUM CHILENSE C. Koch. 



Glabrous. Leaves oblong-linear, sessile, thickish, nearly parallel- 

 nerved. Sheaths with oblong, nerved lobes, at length lacerate, about half 

 as long as the leaf. Flowers campanulate, in 3*5, rather long-peduncled. 

 Nutlets shining, smooth. 



(Chili); W. Patagon.; S. Patagon.; RR. Gallegos and Sta. Cruz; 

 Magellan. 



4. P. CONVOLVULUS Linn. 



Glabrous, scurfy, annual, with twining stem, mostly branching. Leaves 

 ovate-sagittate, the upper narrower, long-petioled, acuminate, subciliate. 

 Axillary floral clusters lax. Flowers greenish, on slender pedicels. Calyx 

 5-parted. Stamens 8. Style subentire with 3 stigmas. Achene trigonal, 

 obovoid-pyramidal, black, not shining. 



(Old World, naturalized in N. Amer.); in cultivated lands near Car- 

 men de Patagones. 



5. P. DELFINI Phil. (Avicularia.} 



Stem 20 cm. high. Branches herbaceous, prostrate. Leaves elliptical, 

 concave, glabrous, pinnate-nerved, the lateral nerves obscure. Sheaths 

 bifid, becoming lacerous. Flowers axillary, fascicled. Achenes long, 

 smooth, trigonal at apex. 



Valley of Rio Palena. 



6. POLYGONUM FERRUGINEUM Weddell. (P. spectabile Mart.) 



Perennial, subglabrous, scurfy. Erect, 60-90 cm. ; fleshy base, sparingly 

 branched, with short internodes. Leaves lanceolate, 5-17 cm. long, 

 acuminate both ways, with short hairs on midrib and short petiole. 

 Sheaths cylindric, ciliate when young. Panicle subsimple, ending in 

 linear, spicate racemes. Calyx pink, nerved ; stamens 6-7, included. 

 Style 2-parted to near its base. Achene lenticular, orbicular, biconvex, 

 nearly black, shining. 



(W. Indies and E. Brazil.) 



P. FERRUGINEUM PATAGONICUM Speg. 



Lower than the type, 15-20 cm. high. Primary cauline leaves when 

 young hoary-puberulous on the under surface, then becoming glabrous 



