72 CRUCIFER^. Nasturtium. 



§ ? (an gen. ?) Silique nearly terete, somewhat torulose ; valves very 

 abrupt or truncate at the summit : style thick : stigma capitate : seeds 

 margined : sepals shorter than the claws of the (violet-purple) petals ; 

 the inner ones slightly gibbous at the base. — Iodanthus. 



3. C. hesperidoides : glabrous ; lower leaves lyrate-pinnalifid ; upper ones 

 ovate-lanceolate, attenuate at the base, unequally and sharply serrate-toothed; 

 pedicels as long as the calyx ; limb of the petals roundish-obovate. — Hespe- 

 ris pinnatifida, Mc/i^. / /. 2. p. 31; Nutt. gen. 2. p. 69; DC. prodr. 1. 

 p. 190. 



p. limb of the petals spatulate. 



Banks of rivers, western part of Pennsylvania to Kentucky (Dr. Short !) 

 and Illinois, Mr. Buckley ! 0. Arkansas, Dr. Pitcher ! May -July — ^ Stem 

 1-3 feet high, angular aud striate, simple or branched. Leaves 2-4 inches 

 long, thin and membranaceous; lower ones usually pinnatifid toward the 

 base, with Avinged petioles ; middle ones sagittate-auricled at the base. — 

 Flowers racemose, the racemes often panicled : pedicels spreading. Sepals 

 ovate-oblong, obtuse, tinged with purple. Siliques about an inch and a 

 half long, narrowly linear, curved upward. Style terete, a line or more in 

 length, in fruit thicker than the depressed-capitate stigma. Seeds roundish- 

 oblong, with a narrow border. Cotyledons o= 



2. NASTURTIUM. R. Br. in hort. Kew. (cd. 2.) i.p. 109; DC. syst. 



2. p. 187. 



Silique nearly terete, sometimes shortened so as to resemble a silicle, usu- 

 ally curved upward. Stigma somewhat 2-lobed. Sepals spreading, equal at 

 the base. Seeds small, irregularly disposed in a double series, not margined^ 

 — Aquatic or subaquatic herbs. Leaves often pinnately divided. Flowers 

 yellow or white. 



§ 1. Petals white : siliques linear : 4 conspicuous glands at the base of 

 the stamens. — Cardaminum, DC. 



1. N. officinale (R. Brown) : leaves pinnately divided ; segments ovate, 

 subcordate, repand ; petals white, longer than the calyx. — DC. prodr. 1. p. 

 137 ; Hook. fl. Bor.-Am. l.p. 39. Sisymbrium Nasturtium, Linn. ; Pursh, 



fi. 2. p. 440? ; Nutt. gen. 2. p. 67. 



Along the Wahlamet River, and in ponds, Oregon, Nuttall; North West 

 Coast, Seoul er ; Southern States, "introduced," Elliott. New England to 

 Virginia, Pursh. — Certainly introduced and scarcely naturalized in the 

 United States. 



§ 2. Petals yellow (rarely white) : siliques commonly short : glands 

 at the base of the stamens small. — Brachylobos, DC. 



2. N. tanacetifolium (Hook. & Am.): leaves pinnately divided; seg- 

 ments sinuate-pinnatifid or toothed; siliques oblong-linear, nearly erect, 

 acute ; style short.' — Hook. ^- Am. ! in jour. bot. 1. p. 190. N. palustre S 

 tanacetifolium, jDC.prorfr. 1. p. 137. Sisymbrium tanacetifolium, Walt. 

 Car. p. 174. S. Walteri, Ell. sk. 2. p. 146. 



Damp soils. South Carolina, East Florida! Louisiana! and Arkansas! 

 March-May. — @ Stem much branched and somewhat decumbent or diffuse, 

 6-12 inches long. Leaves smooth, the ultimate segments obtuse. Flowers 



