404 PATAGONIAN EXPEDITIONS '. BOTANY. 



Species 9, Central Asia and N. Amer., and the following. 



OXYGRAPHIS CYMBALARIA (Pursh, sub Ranunculus] Prantl. 



Glabrous, scapose, spreading by long rooting runners. Leaves long- 

 petioled, clustered at the nodes, round-cordate to reniform, crenate, fleshy. 

 Scapes i-y-flowered. (Fig. in Brit. & Br. ii, 86.) 



(N. Amer.) ; Patagon., wet places near Rio Gallegos, Rio Chico, and 

 Carmen de Patagones. 



6. RANUNCULUS Linn. Crowfoot, Buttercup. 



Herbs, with simple or variously divided, alternate leaves, and yellow or 

 rarely white, regular flowers. Sepals mostly 5. Petals 5 or more with a 

 pit or nectary at the base. Stamens numerous. Carpels numerous, not 

 united, i-ovuled. Achenes in a head or spike, each tipped by its style. 



Species 200, in temperate and cold regions ; also in Himalaya, and by 

 Abyssinia to Madagascar and Mauritius ; in Peru and Chili ; thence to 

 Patagon., and the Falklands. 



KEY TO THE SPECIES. 



A. Corolla white. Leaves floating or dissected. Petals 5-8. 



b. Upper leaves semiorbicular, lobed or wanting. Lower leaves filiformly dissected- 



Aquatics. aquatilis. 



b2. Leaves all semiorbicular, lobed. biternatus. 



b^. Leaves all submerged, capillary multifid. fluitans. 



A2. Corolla white, but with yellow claws. Leaves reniform. Creeping scions, hederaceus. 

 A$. Corolla white to flesh-colored. Leaves 5-lobed, basally auricled. Cauline leaves narrow. 



Achenes smooth. apiifolius. 



A^.. Corolla yellow. 



b. Nectary abortive or foveolate. Leaves glabrous. 



c. Creeping. Flowers opposite to the tripartite leaves. 



d. Lateral leaf-segments orbicular, dentate ; mid-segment bifid. litoralis. 



d2. Leaf-segments cuneate, 2-3 -lobed; the lobes narrow, dentate, montteanus. 

 c2. Creeping or ascending. Flowers axillary. Leaves entire or 3-parted. 



d. Sepals 3 ; petals 3. Leaves obovate-cuneate, apically 3 -toothed, trullifolius. 

 d2. Sepals 3 ; petals 5. Leaves linear, or broader, equally 3-lobed. ccespitosus. 

 d$. Sepals deciduous ; petals 5. Radical leaves orbicular, trisect and again trifid. 



alboffii. 



d^. Sepals reflexed ; petals 4-6. Fleshy plant. crassipes. 



dftj. Sepals and petals 5. 



e. Achenes numerous. Plant small. minutus. 



e2. Ripe achenes 15-18, turgid. Leaves cuneate, apically tridentate. 



monanthos. 



