MACLOSKIE I RANUNCULACE^E. 405 



fa. Nectary with a scale. 



c. Leaves entire or dentate, smooth. 

 d. Flowers opposite the leaves. 



e. Leaves orbicular, basi-cordate. flagelliformis. 



e2. Leaves ovate, or lance-ovate (in Argentina). bonariensis. 



CT,. Leaves small, ovate, tridentate. obtusatus. 



d2. Flowers axillary. Petals 7 or more. 



e. Sepals 3. uniflorus. 



ez. Sepals 5. Leaves fasciculate at the nodes, thick, ovate-elliptical. 



bovei. 

 cz. Leaves ternately parted, the divisions mostly stalked and pinnatifid. Sepals reflexed. 



Bulb. bulbosus. 



c^. Leaves reniform to round-cordate, the upper 3 -parted. Fruit-head rough with curved 



beaks. muricatus. 



C4. Leaves all radical, subpeltate or obovate. Achenes 3-5, only i maturing, hooked. 



oligocarpus. 



c 5. Leaves palmately divided, hairy. Ovaries smooth. 

 d. Ovaries with 3 dorsal nerves. 



e. Sepals 3; petals 8- 10. c/iilensis. 



ez. Sepals 3 ; petals 3 or none. minutiflorus. 



eT,. Sepals 5. 



/. Petals 5, slightly exceeding the sepals. valdivianus. 



f2. Petals 10-15, twice as long as the sepals. Radical leaves trifid, and again 



trilobate. Pedicels elongated. peduncularis. 



dz. Ovaries with only i dorsal nerve. savatieri. 



A$. Aquatics. 



b. Leaves floating and submerged, not dissected. Peduncles long, emerging, fuegianus. 

 bz. Leaves floating, entire, in fascicles of 2 or 3. Flowers axillary, yellow, small. 



hydrop/iilus. 

 3. Stout with rooting flagella, having long-stalked, subpeltate leaves and solitary flowers. 



potamogetonoides. 

 A6. Nearly stemless. 



b. Leaves erect, long-petioled, reniform-rotundate, 3-lobed and toothed. Sepals villous. 



maclovianus. 

 bz. Radical leaves stellately spreading, round-reniform, cleft, covered with yellow silk. 



sericocepJialus. 

 A-j. Radical leaves long-petiolate, 3-cleft, and the segments 3~5-lobed ; the lobes gland-tipped. 



glandtiliferus. 



AS. Erect. Radical leaves 3-lobed; the segments 3-cleft, etc. Stem simple, i -flowered and 

 naked, or 2-flowered with bracts. patagonicus. 







i. RANUNCULUS ALBOFFII Macl. (Alboff sine nomine]. 



Rhizome fibrilliferous. Stem erect, 30 cm. high, its apex blackish, fork- 

 ing, 2-flowered. Leaves pubescent; the radical leaves long-petioled, 



