3 eer 
inequality of the segments of the calyx, and their great length 
in relation to that of the ovate capsule, together with the 
different foliage, afford abundant characters for distinguish- 
ing the present from the preceding species. 
Tas. CVII. Fig. 1. Flower. Fig. 2. Stamens and pistil. 
Fig. 3. Capsule, surrounded by its floral coverings. Fig. 4. 
Capsule, with its valves burst. Fig. 5. Section of do. Fig. 6. 
Seed. Fig.'7. Section of do. Fig. 8. Leaves. Fig. 9. Sec- 
tion of the stem :—all, more or less, magnified. 
[TAB. CVIIL anp CIX: 
ON 
CARDAMINE RHOMBOIDEA AND C. ROTUNDI- 
FOLIA OF NORTH AMERICA. 
Having fallen into an error in the Flora  Boreali- Americana, 
in considering the Cardamine rotundifolia of Michaux? and 
Dec., and C. rhomboidea Dec. ( Arabis rhomboidea and tuberosa, 
Pers.) the same species, I gladly avail myself of the pages of 
the Botanical Miscellany to correct this mistake, and to ac- 
knowledge my obligations to Dr. Darlington of New Chester, 
Pennsylvania, for directing my attention to the subject, which 
he has done in the 18th vol. of Silliman's American Journal of 
Science, p. 356: where, likewise, that accurate Botanist has 
clearly defined the essential characters of the two plants. 
The following remarks and the accompanying figures, will, 
I trust, still further assist in elucidating the subject. — 
Although, however, I am quite satisfied that L have in- 
cluded the synonyms of the two species in the Flora just 
mentioned; yet the specific character exclusively applies to 
one, the C. rhomboidea, Dec., which alone, as far as I know, is 
a native of British N. America: and I must confess myself to be 
still in doubt whether this may not be the original rotundifolia of 
Michaux. The character given by that author (Fl. Am. v. 2. 
