RANUNCULACE^E. 11 



of its leaves, which are however always much more compound 

 than is usual in this genus. 



18. R. marylandicus Poir. : stem erect, somewhat branched and with 

 the petioles soft hairy ; leaves smoothish, ternate ; leafets 3-lobed ; 

 lobes oblong, acute, incisely toothed ; calyx smooth, spreading, shor- 

 ter than the petals ; pericarps compressed, with a straight acuminate 

 style. 



HAB. Woods. Penn. to Virg. May July. L. Flowers pale 

 yellow. Pursh. 



19. R. bidbosus Linn. : hairy ; radical leaves ternate, on long peti- 

 oles ; leafets petiolate, 3-cleft, the segments narrow, incisely toothed ; 

 stem erect, bulbous at the base ; calyx reflexed, hairy ; petals obcor- 

 date, shorter than the sepals. 



HAB. Meadows. May Aug. 2_- Stem 8 15 inches high. 

 Flowers large, bright yellow. Medicinal. See Big. Med. BoL 

 iii. 61. Buttercups. 



*** Carpels aculeate or tuberculate. 



20. U. hirsutus Curt. : leaves ternate or 3-lobed ; lobes obtuse, in- 

 cisely-toothed, middle one pedunculate ; calyx reflexed ; stem not bul- 

 bous at the base ; carpels with a single row of small tubercles on their 

 margins. R.philonotis Pursh. 



HAB. Wet fields. Conn, and Penn. June Oct. If .This has 

 probably been confounded with some other species ; but it dif- 

 fers from all our northern ones, by its tuberculate carpels. 



7. CALTHA. Linn. 



Calyx coloured, with 5 roundish sepals resembling petals. 

 Petals none. Stamens numerous. Capsules 5 10, com- 

 pressed, spreading, 1 -celled, many-seeded. 



Polyandria. Polygynia. 



1. C. paLustris Linn. : stem succulent, erect ; leaves cordate, subor- 

 bicular, obtusely crenate, petiolate ; flowers large, pedunculate ; se- 

 pals ovate. 



HAB. In bogs. N. S. and Can. Labrador to the Columbia ri- 

 ver. April, May. Zf. Stem afoot high, dichotomous. Leaves 

 large and shining. Flowers peduncled, large yellow. 



Marsh Marigold. 



2. C. integerrima Pursh : stem erect, corymbose ; leaves orbicular- 

 cordate, very entire, with the sinus closed ; floral ones sessile, reni- 

 form, obsoletely crenate at the base ; sepals oval, obtuse. 



HAB. Boggy meadows. N. S. May July. 2f . Flowers co- 



ay 

 Sepals 



rymbose, smaller than No. 1. Sepals very obtuse 



3. C. parnassifolia Raf.: stem erect, 1-flowered, 1-leaved; radical 

 leaves petiolate, lanceolate-cordate, obtuse, many-nerved ; sepals 

 elliptical. C.Jicaroides Pursh. Ranunculus Jtcaria, Walt. 



