38 CRUCIFER^E. (MUSTARD FAMILY.) 



eral, flat. Cotyledons uciumbent. Filaments toothless. Low herbs, pubes- 

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

 a bladder, from the inflate 1 pods.) 



1. V. Siiortii, Torr. & Gray. Annual, decumbent, slender, sonuwhat 

 hoary; leaves oblong, entire or repand ; raeeme 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.? Lcscurii, 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 lait/th of the his- 

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

 cell. Hills near Nashville. Tennessee, Leo Lest/uerenx. April, May. Flow- 

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

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



14. CAMEL.INA, 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 ^ ^ dwarf, and AiVoi>, 

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



1. C. SAT!VA, Crantz. Leaves lanceolate, arrow-shaped; pods margined, 

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



15, L<E PIDIUM, 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 accumbcnt ! Flowers small, 

 white. Stamens often only two ! (Name from Xenioiov, a little scale, alluding 

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



i- 1" Virgiiiicum, L. (WILD PEPPERGUASS.) Pods orbicular, vnnn- 

 kss, notched ; cotyledons acctaribcnt ; upper leaves lanceolate, toothed or incised- 

 the lowest pinnatilid ; prials 4; stamens 2. Road-sides. June -Sept. A 

 weed which has immigrated from farther South. 



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

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

 south west ward. 1'ctals often thrice the length of the calyx. 



3. L. RUDKI:.\I.K, L. Pods oral and smaller; cotyledons hcnmbcnt ; p<1ah 

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

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



4. I.. CAMPESTRE, L. Pods ovate, n-in<ja1, rough with minute scales, notched 

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

 chusetts to Delaware. (Adv. from Eu.) 



