Cardamine. CRUCTFER.^. . 85 



Swamps, Arctic! and N. W. Anierica, to the western part of New York ! 

 April-May. — U Stern 12-lS inches hisli. Lower leaves on lone l>etioles, 

 »])e leaflets i)etiolulate, sparingly toothed or entire; those of the upper leaves 

 sometimes almost tiliform. Flowers lartje, white or rose-color. Silitjues 

 erect, an inch lon^: ; the style short and thick, or rather slender : stigma capi- 

 tate or somewhat 2-lobed. 



7. C. hirsuta (Linn.) : leaves pinnate or lyrately pinnatifid ; leaflets of 

 the radical leaves roundish, of the cauline ones oblong or linear, toothed or 

 entire; petals (small) oblong-cuneiform; style short or none; stigma minute; 

 siliques vrect— DC. prodr. I. p. 152; Hook. If. Bor.-Am. 1. p. '45; Darlmgt. 

 Jl. Cest. ed. 2. p. 385. C. Pennsylvanica, Muhl. ! cat. p. 63 ; Willd. sp. 3. 

 p. 486 ; DC. prodr. I. c. ; Ell. sk. 2. p. 144. 



P. acuniinata (Nutt.l mss.): "stem somewhat hirsute; pedicels half as 

 long as the conspicuously acuminate silique." 



J', parvi flora (Nutt. ! mss.): " someAvhat hirsute; stem nearly naked; 

 siliques very long, fastigiately corymbcd." 



(5. Virginica: leaflets with a single tooth on one or both sides: petals 

 scarcely twice as long as the calyx ; racemes strictly erect : stigma sessile. — 

 C. Virginica, Linn.7; Mich.r. ! fl. 2. p. 29 ; DC. I. c. 



Wet places (<5. often on dry rocks), Arctic ! and N. W. America ! to 

 Georgia! /?. British America, y^/c/irtrf/soj?.; Oregon, Nutt all .' May-June. 

 y. Oregon, Nuttall! <5. Connecticut! to Kentucky! (2) Stem 4-18 inches 

 liigh, glabrous or sparingly hirsute. Leaflets often petiolulate, repandly tooth- 

 ed, incised, or entire. Flowers about one-third of an inch in diameter, in 

 y. and L nmch smaUer. Sepals ovate, obtuse. Petals obovate-spatulate, 

 white. Siliques about an inch long. — This plant varies extremely in dif- 

 ferent seasons of the year and in different situations. We follow Sir W, 

 Jackson Hooker, in considering all the forms described above as mere varie- 

 ties of C. hirsuta, Linn. Mr. Nuttall, however, inclines to the opinion that 

 C. Pennsylvanica is distinct from the European plant; and our 5. Virginica 

 should perhaps rank as a separate species. 



8. C. oligosperma (Nutt.! mss.): "somewhat hirsute; leaves pinnate, 

 petiolate ; leaflets reniform or obovate, conspicuously petiolulate, lobed or 

 or toothed ; the central segment often 3-lobed (flowers minute) ; siliques in 

 terminal fascicles, broadly linear, acute, erect, few-seeded; pedicels about 

 one-sixth as long as the siliques. 



" Shady woods of the Oregon.— (J) or (5) About a foot high, Avith a few 

 short axillary branches ; pubescence spreading, simple. Leaflets nearly or- 

 bicular with 3-5 teeth or lobes. Flowers scarcely 2 lines long, Avhite, in 

 very short racemes. Sepals oblong. Petals obovate-cuneiform at the base, 

 but scarcely unguiculate. Siliques about an inch long and nearly a line in 

 breadth; each cell containing from 6 to 8 rather distant seeds.— A Carda- 

 mine, apparently identical Avith this, but Avith shorter siliques, groAvs in Cali- 

 fornia, near St. Barbara. A nearly allied allied species Avas collected in 

 Chili by Dr. Styles (C. macrocarpa, NiUt. mss.) It is somewhat hairy ; the 

 leaflets broadly ovate and sinuately toothed ; the flowers larger (white); the 

 siliques scattered, and longer, with 15 to 18 seeds in each cell ; and the 

 pedicels elongated." Nutt. 



9. C. Ludoviciana (Hook.): stems branching from the base, erect or 

 diffused; leaves pectinately pinnatifid ; segments oblong or linear, toothed; 

 siliques rather erect, broadly linear ; style none ; seeds orbicular, margined ! 

 —Hook.! in jour. hot. 1. p. 191. C. Virginica, Muhl. cat. p. 63. f ft. 

 Lancast. ined. 1. p. 476. Sisymbrium Ludovicianum, Nutt.! mss. in herb, 

 acad. Philad. 



Georgia! to Kentucky! Louisiana, and Arkansas. — (T) Stem 4-10 inches 

 long. Radical leaves rosulate in the young plant; segments 7-10 pairs. 



