412 PATAGONIAN EXPEDITIONS I BOTANY. 



21. RANUNCULUS POTAMOGETONOIDES Speg. 



Stout, glabrous, flagelliferous, the flagella rooting, their apex fascicu- 

 late-leafy; the leaves long-petiolate, entire, subpeltate, orbicular-ovate, 

 obtuse, the base rounded-subcordate, narrowly peltate-marginate. Flowers 

 solitary, peduncles shorter than the leaves. Achenes in a globose head, 

 numerous, elliptico-obovate, longitudinally striate. 



Rio Sta. Cruz, in flowing water at Orr-aike. 



22. R. SAVATIERI Franch. 



Stiffly pilose. Stems 60-90 cm. long, prostrate, bearing at the nodes a 

 fascicle of leaves or branchlets. Leaves long-petioled, reniform-cordate, 

 trisect, the segments obovate-cuneiform, 3~5-lobed. Peduncles 25 mm. 

 long, slender, from the nodes. Flowers scarcely 4 mm. diameter : sepals 

 broad-ovate ; petals as long, narrow. Achenes 1.5 mm., dorsally subacute, 

 ovate-rounded ; style infra-apical, slightly incurved. 



Patagon., at Punta Arenas. 



23. R. SERICOCEPHALUS Hook. f. 



Depressed, stemless ; densely covered by yellow, silky hairs. Leaves 

 radical, stellately spreading, round-reniform, irregularly 3-7-cleft, their 

 lobes coarsely crenate-toothed. Peduncles very short ; flowers small, in- 

 conspicuous. Petals narrow, spatulate, yellow. Achenes silky ; style 

 hooked. 



Falklands, Fuegia, at Ushuaia ; here caulescent and larger. 



24. R. TRULLIFOLIUS Hook. f. 



Glabrous. Stem short, sarmentose. Leaves radical, obovate-cuneate, 

 entire, apically 3-5-toothed ; petioles long, thick, attenuate upwards. Pe- 

 duncles shorter than the petiole. Flowers inconspicuous. Sepals broad- 

 ovate-rounded. Petals shorter. Achenes large (/-/, Fig. 69, p. 409). 



(Kerguelen) ; Falklands, in freshwater ; Magellan, E. and S. Fuegia ; 

 not rare by streams near Punta Arenas. 



7. HAMADRYAS Comm. 



Dioecious, the scape bearing one male, or two female flowers, with rudi- 

 ments of suppressed organs. Low herbs from perennial caudex, with 



