Davis: RANUNCULI OF NORTH AMERICA. 503 



ers small, yellow, one to several on scape-like stems ; sepals 

 often 5, deciduous; petals 5-12, pit at base small; stamens 

 many : akenes compressed, somewhat swollen, thin-walled, 

 striate with simple or branched nerves : head of fruit oblong or 

 oval. Several species, but the following only is found in 

 America. Section HALODES, Gray, Proc. Am. Acad. 21 : 

 366, under Ranunculus. 



0. Cymbalaria PRANTL, in Engl. & Prantl, Nat. Pfl. Fam. 



3: Abt. 2, 63. 1891. 



^Ranunculus salnginosus PALL. Reise. 3 : 263. 1776. 

 R. Cymbalaria PURSH, Fl. 2: 392. 1814. 

 R. halophilus SCHLECHT. Animad. Ranunc. i: 23. t. 4. 



/. /. i8iQ. 



R. tridentatus H.B.K. Nov. Gen. & Sp. PL 5 : 42. 1821. 

 R. Cymbalaria var. alpmus HOOK. Fl. i: n. 1833. 

 Cyrtorhyncha Cymbalaria BRITTON, Mem. Torr. Club, 



5: 161. 1894. 



Leaves orbicular to ovate, cordate or truncate at base, one 

 inch long or even much less : scapes short ; receptacle elongat- 

 ing in fruit : akenes minutely sharp-pointed. Summer. Shady 

 shores and moist saline or salt grounds. Arctic sea coasts to 

 New Jersey, west to Minnesota, thence south and west. Also 

 Mexico, South America, Greenland, Asia. 



INDEX TO NAMES OF RANUNCULUS. 

 (References to other genera are indicated by their initials.) 



aborti-vus Hook., 35. affinis Torr., 49. 



abortivus Linn., 32. affinis var. cardiophyllus, 42. 



abortivus var. australis, 32. affinis var. lasiocarpus, 42. 



abortivus var. encyclus, 32. affinis \a.r.'leiocarpus, 42. 



abortivus var. grandiflorus, 32. ajfinis var. micropetalus, 42. 



abortivus var. Harveyi, 32. affinis var. validus, 42. 



abortivus var. micranthus, 10. alceus, 6. 



aconitifolius, 73- alisnuzfolius Benth., 79- 



acris Hook., 29. alismcEfolius Geyer, 81. 



acris Linn., 40. alismcefolius var. alismellus, 82. 



acris var. Deppii, 30. alismcefolius var. calthceflorus, 



acriformis, 29. Si. 



adoneus, 58. alismcefolius var. montanus, 82. 



ajfinis R. Br., 42. alismellus, 82. 



