Ranunculus. RANUNCULACEaE. 19 



"Margin of ponds throughout the upper and western part of Missouri; 

 likewise in Arkansas, collected by Dr. Pitcher." Nullall ! — Dislin<,nii-hed 

 iroin R. abortivus, which it much resembles, by the constant hairiness of the 

 stem, calyx, and petioles, as will as by the very ditlerenl form of the primary 

 leaves. " From R. ovalis it dillers in the flower being less than half as large, 

 and also by the shorter radical leaves with much fewer serraturcs." Niui. 



/?. '? Cidifurnkiui : stem very short; leaves much crowded; primary 

 ones reni form-cordate, cauiine trifoliolate ; the leaflets on long petioles, 2-|j 

 lobed. 



California. DoHcrlas ! — Stem short and thick, scarcely 2 inches high. 

 Leaves nearly glabrous, except a little hairiness on the margin, the petioles 

 pubescent. Flower subsolitary, as large as in R. abortivus. — We have but a 

 solitary and rather imperfect specimen of this plant, and are therefore unable to 

 determine whether it is a distinct species, or a mere variety of R. micranthus. 



•15. R. glahervimus (Hook.) : leaves all (except the uppermost) petioled ; 

 radical ones roundish, entire or coarsely 3-toothed ; cauiine ones somewhat 

 cuneiform, 3-cleft ; petals twice as large as the oval spreading sepals ; heads 

 of caqiels globose. Hook. Jl. Bor.-Am. 1. p. 12. t. 5. A ; Nuit. ! in jour, 

 acad. Philad. 1. p. 7. 



Rocky Mountams near perpetual snow, Douglas ; WallaAvallali River, &c. 

 Nuttall ! — Roots fibrose-fasciclcd. Whole plant very glabrous, somewhat 

 succulent. Stem a span high, 1-3-flowered. Cauiine leaves 3-cleft ; seg- 

 ments lanceolate, obtuse, entire. Corolla half an inch in diameter. Petals 

 5, oval, twice the length of the calyx. 



16. R. abortivus (Linn.) : glabrous and very smooth ; radical leaves peti- 

 oled, reniform or broadly ovate and subcordate, crenate, sometimes 3-cIeft ; 

 cauiine ones 3-5-parted, with linear-oblong nearly entire segments ; sepals 

 reflexed, longer than the petals ; head of carpels globose or ovate. — Willd. 

 sp. 2. p. 1334 ; Pnrsh ! fl. 2. p. 392 ; DC. prodr. 1. p. 34 ; Hook. Jl. Bor.- 

 Am. 1. Tj. 14. (excl. /?.) R. nitidus, ^YaU. Car. p. 159?; Pursh ! I. c. 



Newfoundland, and Canada lat. 57°, to S. Carolina ! west to Arkansas ! 

 and the Rocky Mountains ; in rocky woods. April-June. — Root fibrose- 

 fascicled. Stem simple or branching. Flowers 2-3 lines in diameter. Se- 

 pals oval, obtuse, colored. Petals pale yellow, with a conspicuous truncate 

 scale. Carpels roundish, margined, with a very short straight style (or some- 

 times with a long and stout recurved miicro. Hook.) — Near R. auricomus, 

 but a smoother plant with much smaller flowers. Var. P. of Hooker is per- 

 liaps a form of that species. 



17. R. sceleratus (Linn.) : glabrous ; leaves petioled, 3-parted ; radical 

 ones with the divisions 3-lobed and obtusely incised ; the upper cauiine ones 

 Aviih oblong-linear nearly entire lobes ; sepals reflexed, about equal to the 

 petals ; camels minute, disposed in oblong-cylindrical heads. — WUJd. sp. 2. 

 p. 1315 ; Pursh ! fl. 2. jj. 293 ; DC. prodr. 1. p. 34 ; Ell. sk. 2. p. 59 ; Hook, 

 fl. Bor.-Am. l.p. 15. 



p. midtijidus (Nntt.lmss.): "leaves much divided ; flowers larger ; headof 

 carpels ovate, thick." 



In ditches, &.c. Canada! (lat. 67°) to S.Carolina, p. Ponds of the Platte, 

 Nuttall ! — Stem thick and succulent, fistulous, very leafy. Flowers small, 

 pale yellow. Carpels very numerous, scarcely pointed. /?. About a span 

 high, more slender ; the head of carpels much shorter and thicker. 



IS. R. Pnrshii (Richardson): submerged leaves filiformly 2-3-choto- 

 mously dissected, with the segments flat ; emersed ones reniform, 3-5-parted, 

 the lobes variously divided ; petals twice as large as the reflexed sepals ; car- 

 pels in globose heads, smooth, with a short and straight ensiform style. — 

 Hook. ! fl. Bor.-Am. 1. p. 15. 



a. leaves all filiformly dissected (flowers as large as in R. acris) ; stem fis- 



