Ordbr 1 3 . — C L ' I VERM 229 



near Boston (Sprague). Sts. ascending from a prostrate base. Fls. rather large 

 and showy. Pet. ^ longer than calyx. Pods nearly £' long, the pedicels rather 

 longer, ascending. Jn., Jl. § Eur. 

 9 N. sinuatum Nutt. Lvs. pinnatified, segm. lance-oblong, nearly entire ; pods 

 oblong, acuta, with a slender style. — Banks of the Miss, opposite St. Louis, southward, 

 W. to Oregon. Glabrous and diffusely branched. Lvs. regularly pinnatified, the 

 terminal segm. often confluent. Pis. rather large and showy. Pods about J' 

 long, slightly curved, the pedicels still longer, spreading or recurved. Jn. 



2. TURRITIS, Dillon. Tower Mustard. (Lat. tarritis, turreted ; 

 from the pyramidal form of the plant.) Sepals erect, converging ; 

 silique long, linear, 2-edged ; valves plain, 1-veined ; seeds in a double 

 row (margined in one species) (0=). — Fls. white or rose-colored. Stem 

 lvs. mostly saggittate-Clasping. 



1 T. glabra L. Fls. (cream-white) erect; siliques long (3'), strictly erect ; stem-lvs. 

 ovate lanceolate. — CD In rocky fields about New Haven (Eaton) and Can. Glabrous. 

 St. round, simple, l-|f high. Radical-lvs. petiolate, dentate ; cauline arrow-shaped 

 and half-clasping at base, smooth, glaucous and entire. Siliques straight and 

 very narrow. May. § Eur. 



2 T. stricta Graham. Fls. (rose-white) erect; silique long (3'), erect, finally ascend- 

 ing, stem-lvs. linear -lanceolate. — @ On rocks, N. Y. (rare), "W. to Or. Plant glab- 

 rous. St. straight, erect, simple, 1 — 2f high. Root-lvs. spatulate, remotely den- 

 ticulate ; stem-lvs. arrow shaped, clasping, erect, nearly entire. Rac. terminal, 

 elongated in fruit. May. 



3 T. brachycarpa Torr & Gr. Fls. (pale-purple) nodding; siliques shorter (V), 

 spreading. — Lake shores Mich. Glabrous and glaucous, often purplish. Stem 

 1 — 2f high. Root-lvs. spatulate, dentate ; cauline linear-lanceolate, sagittate and 

 clasping. Fls. rather large. 



3. IODANTHUS, Torr. & Gray. False Rocket. (Gr. i66rjg violet- 

 colored, dvOog, flower,) Calyx closed, shorter than the claws of the 

 petals ; silique linear, terete, veinless ; seeds arranged in a single row 

 in each cell (0 = ). — Glabrous, with violet-purple flowers in panicled 

 racemes. 



I. pinnatifida Torr & Gr. — % Penn. to 111., S. to Ark. St. slender, furrowed 

 2 — 3f high. Lvs. thin, sharply dentate, 3 — 5' long, i as wide, the lower often 

 lyrate-pinnatifid, those of the stem lanceolate, acuminate, scarcely petiolate. 

 Rac. terminal and axillary. Petals loug-clawed, with an obovate border. Pods 

 torulous, 15 — 20" long; sds. oblong, plano-convex. May, Jn. 



4. MATTHIOLA, R. Br. Stock. (In honor of P. A. Matthioli, 

 physician to Ferdinand of Austria, and botanic author.) Calyx closed, 

 2 of the sepals gibbous at base ; petals dilated ; siliques terete ; stigmas 

 conuivant, thickened or cornute at the back. — Herbaceous or shrubby, 

 oriental plants, clothed with a hoary, stellate pubescence. 



* Perennial or biennial. Stems herbaceous Xos. 1, 2. 



* Perennial. Stems shrubby at base Nos. 8, 4. 



1 M. annuus R. Br. Ten weeks' stock. St. erect, branched ; lvs. hoary- 

 cane-scent, lanceolate, obtuse, subdentate; silique subcylindrical. — CD A fine 

 garden flower from S. Europe: St. 2f high, and, with the leaves, covered with 

 a soft, stellate pubescence. Fls. variegated. Jn.f 



2 M. Graecus R. Br. Grecian Stock. St. erect, branched ; lvs. lanceolate, 

 glabrous; siliques somewhat compressed. — © From Greece. Plant about If 

 high, distinguished from the remainder of the genus by its smooth foliage. Fls. 

 white, appearing all summer. \ 



3 M. incanus R. Br. Purple July Flower. St erect, h-anched; lvs. lance- 

 olate, entire, hoary-canescent ; siliques subcylindrical, truncate and compressed 



