UANUNCU1.ACE.E. 



toothed, acute, the upper ones linear; stem many-flowered; peduncles 

 terete, not furrowed ; calyx spreading, villous ; carpels roundish, com- 

 pressed, terminated by a short recurved beak. 



Meadows and pastures. Hudson's Bay to Del. W. to Miss. May Sept. 

 7J.. Stem varying much in height, mostly hairy. Flowers bright yellow, 

 shining, about an inch in diameter. Introduced ? Tall Crowfoot. 



10. R. repens Linn. : leaves ternate ; leafets wedgeform, 3-lobed, incisely 

 dentate; central one petiolate ; main stems prostrate, flowering ones erect; 

 peduncles furrowed ; calyx pilose, spreading ; carpels with a straight point. 

 R. nilidus Muhl. R. Marylandicus Pair. 



Wet meadows. Can. to Geor. W. to the Pacific. June Sept. % Pla.nl 

 increasing by runners. Flowering stems erect, 1 2 feet high. Flowers mid- 

 dle sized. Creeping Crowfoot. 



11. R. CLintonii Deck : somewhat hairy ; stems creeping and rooting at 

 each of the joints ; lower leaves on long petioles, ternate ; leafets toothed 

 and incised, cuneate, terminal one petioled ; floral leaves incised or linear ; 

 peduncle 1 3 flowered; petals rounded; calyx spreading; carpels mar- 

 gined, with a short uncinate style. R. prostratus Eat. R. repens Tort: 

 fy Gr. 



Banks of the canal, near Rome, Oneida co., N. Y. June, July. 7J.. Much 

 smaller than R. repens, at least of American botanists, in all its parts except 

 the flower, which is of a bright yellow, and about as large as that of R. acris. 

 Leaves seldom more than 1J inches in length, and about the same in breadth. 

 Stems distinctly creeping like those of R. reptans ; flowering ones 6 8 inches 

 high. Style short and hooked. This species, which was introduced into the 

 1st edition, I still believe to be distinct. Clinton's Crowfoot. 



12. R. Mspidus Mick.: erect, branched; stem and petioles with stiff 

 spreading hairs; leaves ternate or 3-parted; leafets or segments acutely 

 lobed ; pubescence of the pedicels appressed ; calyx hairy, at length reflexed ; 

 carpels in a globose head, margined, compressed, smooth ; style short and 

 straight. R. Pennsylvanicus Pursh. 



Wet grounds. Can. to Car. N. to lat. 67 ; and from Hudson's Bay to the 

 Pacific. June Aug. 1\.. Stem 18 inches high, very hairy ; Lower leaves on 

 long petioles ; upper ones nearly sessile ; leafets nearly all petioled, 3-cleft or 

 3-parted, attenuate at base. Flowers about the size of R. acris. 



Hairy Crowfoot. 



13. R. Pennsijlvanicus Linn. : stem erect and with the petioles covered 

 with stiff spreading hair's ; leaves ternate, villous ; segments subpetiolate, 

 acutely 3-Iobed, incisely serrate ; calyx reflexed, longer than the small pe- 

 tals; carpels with a short oblique style, collected into an oblong head. 

 R. hispidus Pursh. 



Wet meadows. From the Arctic regions to Geor. July, Aug. If. Stem 

 1 2 feet high, usually much branched. Flowers small, pale yellow. Carpels 

 viscid. Distinguished from R. hispidus, by its oblong heads of carpels, and by 

 its shorter style. Pennsylvanian Crowfoot. 



14. R. recurvatus Pursh. : stem erect and with the petioles covered with 

 spreading hairs; leaves 3-parted, hairy; segments oval, subincised, the 

 lateral ones 2-lobed ; calyx reflexed ; petals lanceolate ; carpels crowned 

 with a sharp hooked style. 



Shady woods. Throughout the IT. S., and from Labrador to the Columbia 



1* 



