348 PATAGONIAN EXPEDITIONS I BOTANY. 



A2. Hermaphrodite ; leaves not hastate. 



b. Fruiting calyx entire. Leaves usually petiolate. 



c. Leaves narrow-spatulate, basi-attenuate. Outer fruiting sepals with large callus. 



crisparia. 

 c2. Leaves oblong-lanceolate, basi-cordate, wavy. Fruiting sepals broad. 



crispus. 

 c$. Leaves obovate to cuneate-oblong. Fruiting sepals elliptical. Racemes terminal 



leafless. cuneifolius. 



4. Leaves oblong-linear, acuminate, runcinate. mafftHanifUS (Cusp.), 



^5. Leaves lanceolate, attenuate upwards, rounded at base. magellanicus (Gris.). 



b2. Fruiting calyx toothed or lacerate. 



c. Leaves narrow-lanceolate. Pedicels slender. Long, setaceous teeth from fruiting 



calyx. maritimus. 



c2. Lower leaves cordate-oblong, upper narrow. 



d. Fruiting sepals cordate, unequally enlarged. Inflorescence leafless. 



pratensis. 



d2. Fruiting sepals large and veiny. Uppermost leaves linear, pulcher. 

 b$. Prostrate from thick taproot. Radical leaves narrow-linear. decumbens. 



i. RUMEX ACETOSA Linn. 



Stem 30-90 cm. tall. Basal leaves few, long-petiolate ; upper leaves 

 subsessile, 3-12 cm. long, oblong-hastate. Sepals in fruit oblong-cordate. 

 (Eurasia and temperate N. Amer. Fig. in Brit. & Br. i, p. 548.) 

 Falklands (introduced). 



2. R. ACETOSELLA Linn. Sheep-sorrel. 



Glabrous, annual or perennial herbs, with slender, erect stem, creeping 

 rootstock, and dioecious flowers. Leaves narrow, hastate, 3-10 cm. long, 

 obtuse or acute, petioled, the auricle entire or toothed ; or upper leaves 

 without auricle. Sheath silvery, soon lacerate. Sepals i mm., achene 

 2 mm. long. Foliage often of reddish hue. 



(Eurasia, and through temperate and warm parts of N. Amer. Fig. in 

 Brit. & Br. i, p. 547.) 



Falklands. Punta Arenas (J. B. Hatcher). "This and the R. acetosa 

 L., included in Gaudichaud's list, I consider undoubtedly as introduced 

 plants, of which the seeds, being eaten by the birds, are by their agency 

 transported to otherwise inaccessible cliffs." (J. D. Hooker.) 



3. R. CRISPISSIMUS O. Ktze. 



Low, glabroiis, blackish herb, with ascending stems, to 10 cm. high. 

 Leaves narrow-spatulate, obtuse, attenuate to a long petiole (blade over 3 



