66 LAWSON: EBVISION OF THE 



the same period it was described in the works of Dodonoeus and others as R. tuberosm 

 whilst Tabernœmontanus figured it as R. minus, and Petiver, in the English Herbal, 

 called it " Bulbous Crow-foot." 



The old books contain a double A^ariety (R. htlbosi/s flare plena, C. Bauhin, Piuax, 1*79), 

 which Provancher refers to as the Bouton d'or of French Canadian gardens, R. bulbasus, 

 Lobel, Icônes, 666, f. 2, (1591). 



40. — Ranunculus digitatus. Hooker. 



Acaulescent, glabrous, root a fascicle of 3 to 5 clavate tubers (as in the common Euro- 

 pean R. Ficaria). Leaves few, petiolate, the lamina divided in a digitate manner into from 

 3 to 4 oblong-spathulate lobes. Flowers 1-3, terminal ; sepals spreading or reflexed, half 

 the length of the petals ; petals *7-ll oblong-cuneate, obtuse, yellow, with a nectary-scale 

 at the claw. Stamens numerous. Carpels in a nearly globose head, ovate, compressed, 

 with a subulate very slightly recvirved beak. 



Ranunculus digitatus. Hooker, Jour. Bot. and Kew Gard. Misc. III. (1851), p. 124, t. 4. 

 Walpers, Ann. (Miiller), IV., p. 1*7. Lawson, Eanunc. Canad., p. 43. Watson, King's 

 Reports, V., p. 8. Bibl. Index, VIII., p. 18. 



Rocky Mountains [pro'bably Peace River], Van Express Party, spring of 1854. — 

 Governor McTavish, H. B. Co. Rocky Mountains near Fort Hall [Oregon], Hook. 1. c. 



Ranunculus okthoehynchus, (Hooker), has not, so far as known, been found in 

 British America. It is a slender plant with much divided leaves, the ultimate lobes 

 narrow and linear. Hook., Fl. Bor.-Am., I., p. 21, tab. 9. Oregon. — Douglas. See Gray, 

 Proc. Am. Acad., VIII., p. 3*73. 



Genus VIL— CALTHA, Linnceus. 

 Bentham and Hooker, Genera Plantarum, I., p. 6. 



List of Species : — 



1. C. palustris. 



2. 0. palustris var. Sibirica. 

 •3. C. natans. 



4. C. leptosepala. 



5. C. leptosexîala ? var. billora. 



1. — Caltha palustris, Linnœus. 



Stem thick, hollow. Leaves rounded, reniform, or cordate, lobes rounded, margin 

 crenately notched or nearly entire. 



Caltha palustris. Linn. Sp. Plant., p. '784. Fl. Dan., t. 668. E. B., t. 506. Forst., 

 Trans. Linn. Soc, VIII., p. 323. DC. Syst. Nat., I., p. 308. Michaux, Pursh, &c. Hook., 

 Fl. Bor.-Am., I., p. 22. Torr. and Gr., Fl. N. A., I., p. 26. Gray, Manual, p. 24. Hook, 

 f., Arct. PL, pp. 283 and 312. Lawson, Ranunc. Canad., p. 44, Macoun, Cat., No. 54. 

 "Watson, Bibl. Index, I, p. 8. 



