RANUNCULACE^E. (CROWFOOT F ,-iLY.; 41 



Var. terr^stris, which differs from the ordinary emersed forms hy the 

 stems ascending from the base and paniculately several-flowered at the summit, 

 where the leaves are reduced to oblong or linear bracts ; no immersed dissected 

 leaves. — Ann Arbor, Michigan, on muddy banks, Miss Clark. 

 ■*- -i- Terrestrial but qrowing in very wet places, glabrous or nearly so : root peren- 

 nial : leaves all entire or barely toothed, all or else all but the lowest lanceolate or 

 linear ; carpels forming a globular head. (Spearwort.) 



4. R. alisni88f61ius, Geyer. (Water Plantain Spearwort.) Stems 

 hollow, ascending (l°-2° high), often rooting from the lower joints; leaves 

 lanceolate or the lowest oblong, mostly denticulate (3' -5' long), contracted 

 into a margined petiole which expands into a membranaceous clasping base ; 

 petals 5-7, bright yellow, much longer than the calyx (3" -4" long); carpels 

 flattened, large, pointed with a long and straight narrow subulate beak. — Common, 

 especially northward. June - Aug. — Intel-mediate in appearance between R. 

 Flammula and Lingua, and has been confounded with both, but most resembles 

 the latter. 



5. R. Flammula, E. (Smaller Spearwort.) Stem reclining or 

 ascending, rooting below ; leaves lanceolate or linear, or the lowest oblong- 

 lanceolate, entire or nearly so, mostly petioled (l'-2' long) ; petals 5-7, much 

 longer than the calyx, bright yellow ; carpels flattish but turgid, mucronate with 

 a short abrupt point. — Shore of L. Ontario and northward : rare, and only a 

 small form (var. intermeditjs) met with in this country, a span high, with 

 flowers 3" in diameter, passing into 



Var. reptans. (Creeping S.) Small, slender, the filiform creeping stems 

 rooting at all the joints (3'- 6' long; leaves linear, spatulate, or oblong (| ; -'l' 

 long). — Gravelly or sandy shores and inundated banks; very common north- 

 ward. June- Sept. (Eu.) 



6. R. oblongifblius, Ell. Stem erect or ascending, often pubescent 

 below, slender (1° high), diffusely branched above and many-flowered; leaves ser- 

 rate or denticulate; the lower long-petioled, ovate or oblong (^'-1|' long) ; the 

 uppermost linear; flowers 3" -5" broad; petals 5, twice the length of the calyx, 

 bright yellow ; stamens numerous ; carpels minute, almost globular, tipped with a 

 very small sessile stigma. (R. pusillus, var. Torr. Sr Gr. Fl. R. Texensis, 

 Engelm.) Wet prairies, Salem, Illinois, Belib, and in S. States. June. 



7. R. pusillus, Poir. Stem ascending, weak, loosely branching (6 ; -18 

 long) ; leaves entire or obscurely denticulate ; the lowest round-ovate or heart- 

 shaped (£' long), long-petioled, the upper oblong or lanceolate (l'-l^' long) ; 

 flowers very small; petals 1-5, yellowish, scarcely exceeding the calyx and the 3- 

 10 stamens; carpels very turgid, tipped with a minute sessile stigma. — Wet 

 places, S. New York and southward along the coast. June -Aug. 



-1- -i- -t- Terrestrial, with annual root, spreading by runners, glabrous: leaves all 

 rounded and undivided but coarsely crenate : carpels in fruit forming an oblong 

 head. 



8. R. Cymbalaria, Pursh. (Sea-side Crowfoot.) Flowering stems 

 leafless (3' -6' high), 1 - 7-flowered ; leaves clustered at the root and on the 

 joints of the long rooting runners, roundish-heart-shaped or kidney-shaped, 



L & M— 22 



