Myosurcs. RANUNCULACEiE. 25 



41. R. parviflorus (Linn.): villous; leaves somewhat orbicular, 3-lobed or 

 ternate ; stem subdocuinbent ; calyx equalling the petals, at hiii^th rellexed ; 

 carpels roundish, (granulated and hispid ; style short, straicht, or slightly 

 hooked. — DC. proflr. 1. ]>. 42. R. trachyspermus, Eli.! sk. 2. p. G5. 



p. leaves 3-lobed, with the lobes iucisely and acutely toothed. 



y. leaves cleft to the base or ternate ; leallets cuneiform, 3-lobed. 



Virginia, North Carolina! /?. Georgia!). California, Dovgla.'i! — (J) ! Stem 

 6-15 inches high, slender. Leaves less than an inch in diameter. Flowers 

 small. Petals 3-4-5. Carpels with a thin acute margin ; beak scarcely one 

 third the length of the carpel. 



X Doubtful species. 



42. R. Ilornemanni (Schlecht.): leaves ternate, hirsute ; leaflets 3-lob"d ; 

 calyx reflexed, pilose; peduncles sulcate. DC. prodr. 1. p. 44; Schlecht. 

 animad. bot. 2. p. 36. — Allied to R, Philonotis. DC. 



43. R. CJiiJensis (DC): stem procumbent, and with the petioles hispid; 

 leaves somewhat villous, roundish-cordate, 2-3-cleft; lobes coarsely dentate; 

 calyx very villous. DC. syst. 1. p. 286 ; Ilook. ^ Am. in bot. Beechey,p. 

 4. t. 3. 



Cahfornia? Hook. ^ Am. (1. c.) The plant may have been introduced by 

 mistake among the Californiaa collections of Beechey's voyage. 



44. R. sepientrionalis (Poir.) : smoothish ; leaves membranaceous, gla- 

 brous, 3-foliolate ; leaflets somewhat 3-lobed, incised, acute ; stem and base 

 of the petioles hirsute ; peduncles about 2-flowered; calyx reflexed. Poir. 

 diet. 6. p. 125 ; Pursh, fi. 2. p. 395. 



De Candolle refers Poiret's plant to his R. Carolinianus ; but it can hardly 

 be that species. 



R. Robini, Raf. Jl. Liidov.=K. Flammula. 



R. meganthusj Raf. 1. c. 



R. polypetaluSj Raf. 1. c. 



R. leptopetalus, Raf. 1. c. 



R. obtusiusculus, Raf.; DC. prodr. 1. p. 43. 



6. MYOSURUS. DHL; Linn. ; DC. syst. 1. p. 231. 



Sepals 5, produced downward at the base beyond their insertion. Petals 

 5 ; the claw filiform and tubular. Stamens 5-20. Achenia triquetrous, very 

 closely spicate on a much elongated torus. Seed suspended. — A minute 

 annual, with linear entire radical leaves. Scapes 1-flowered; flower mi- 

 nute. 



M. minimus (Linn.) — DC. prodr. 1. p. 25; Ell. sk. I. p. 582. M. 

 Shortii, Raf. ! in Sill. jour. 1. p. 379 ; DC. I. c. 



Rocky borders of the Wahlamet, Oregon: and in alluvial situations in 

 Arkansas, Nnttall ! Georgia and Louisiana, Z>r. /yeare??7/-or?/i .' Kentucky, 

 Short ! April. — Leaves 1-2 inches long, less than a line in breadth. Scape 

 1-4 inches high. Flowers pale yellow. Spike of carpels terete, tapering, 

 resembling the tail of a mouse : — hence its vulgar name-'Motise-tail. 



4 



