88 CRUCIFEB^E. (MUSTARD FAMILY.) 



eral, fla;. Cotyledons accumbent. Filaments toothless. Low herbs, pubes- 

 cent or hoary with stellate hairs. Flowers mostly yellow. (Name from vesica, 

 a bladder, from the inflated pods.) 



1. V. Shoifii, Torr. & Gray. Annual, decumbent, slender, somewhat 

 hoary ; leaves oblong, entire or repand ; raceme loose ; style filiform, longer than 

 the (immature) small and canescent spherical pod; seeds not margined, 1 -2 in each 

 cell. Rocky banks of Elkhorn Creek, near Lexington, Kentucky, Short. 



2. V. 1 Lescurii, n. sp. Somewhat pubescent, but green ; stems diffusely 

 ascending from a biennial root : leaves oblong or oval, sparingly toothed, those 

 of the stem half-clasping by a sagittate base ; racemes elongated, many-flowered ; 

 pedicels ascending ; filaments inflated at the base ; style half the length of the his- 

 pid orbicular or broadly oval flattened pod; seeds wing-margined, 1-4 in each 

 cell. Hills near Nashville, Tennessee, Leo Lesquereux. April, May. Flow- 

 ers golden yellow. Pods so fiat that, as far as they are concerned, the species 

 hould rather belong to Alyssum. Plant to be sought in Southern Kentucky. 



14. CAME LIN A, Crantz. FALSE FLAX. 



Pouch obovoid or pear-shaped, pointed, turgid, flattish parallel to the broad 

 partition : valves 1 -nerved. Seeds numerous, oblong. Cotyledons incumbent. 

 Style slender. Flowers small, yellow. (Name from x a P- a ^ dwarf, and \ivovj 

 flax. It has been fancied to be a sort of degenerate flax.) 



1 . C. SAxirA, Crantz. Leaves lanceolate, arrow-shaped ; pods margined, 

 large. Flax-fields, &c. A noxious weed. (Adv. from Eu.) 



15. l/EPIDIVIfl, L. PEPPERWORT. PEPPERGRASS. 



Pouch roundish, much flattened contrary to the narrow partition, usually 

 notched at the apex ; the valves boat-shaped and keeled. Seeds 1 in each cell, 

 pendulous. Cotyledons incumbent or in No. 1 accumbent! Flowers small, 

 white. Stamens often only two ! (Name from Xerrio'ioi', a little scale, alluding 

 to the small flat pods.) Ours are annuals or biennials. 



1. It. Virginiciim, L. (WILD PEPPERGRASS.) Pods orbicular, wing- 

 less, notched ; cotyledons accumbent ; upper leaves lanceolate, toothed or incised ; 

 the lowest pinnatifid; petals 4; stamens 2. Road-sides. June - Sept. A 

 weed which has immigrated from farther South. 



2. It. intermedium, Gray. Cotyledons incumbent ; upper leaves linear 

 or lanceolate, entire: otherwise like No. 1. From Michigan northward and 

 southwestward. Petals often thrice the length of the calyx. 



3. It. RUDEK\LE, L. Pods oval and smaller; cotyledons incumbent; petals 

 none ; stem? diffusely much branched : otherwise much as in No. 1 . Road- 

 Bides, near towns ; sparingly. (Adv. from Eu.) 



4. It. CAMPESTRE, L. Pods ovate, winged, rough with minute scales, notched ; 

 leaves arrow-shaped, toothed, downy ; stamens 6. Fields, sparing from Massa- 

 chusetu to Delaware. (Adr. from Eu.) 



