MUSTARD FA.MIIA'. U.'> 



small, white, honey-.scented, in at length elongated racemes, the round 

 little pods with a single seed in each cell. A variety much used for 

 borders has paler and white-edged leaves ; tlowers all summer in gardens, 

 or in the greenhouse in winter. ® 



A. saxdti/e, Linn. Hock A. Low, hoary-leaved, with abundant bright yel- 

 low tlowers, in spring ; a variety with white-edged leaves is also grown. ^ 



9. LESQUERELLA. (For the late Leo Lesquereiix.) (l) (2) or ^ 

 with stellate hairs or scales, and globular, inflated pods. 



L. globdsa, Wats. ® or @ Stems spreading ; petals bright yellow ; 

 style longer than the pod. Ky., Tenn., Mo. Two other species occur in 

 our territory W. and S. W. 



10. AUBRIETIA. (For Anhriet, a French botanical draughtsman.) 

 11 Pods eylindric, inflated ; seeds globular. Flowers purple. 



A. deltoidea, DC. Leaves rhombic, with 1 or 2 large teeth. Kacemes 

 few-Howered. A pretty plant from S. Eu. for rockeries. Several garden 

 varieties. 



11. NASTURTIUM, WATEK CRESS, H(1RSE-RADISH, etc. (Latin: 

 mtitus toHuK, convulsed nose, from the pungent qualities.) Fods short- 

 ish or short (from oblong-linear to almost spherical). Here -are com- 

 bined a variety of plants, widely different in appearance. The following 

 are the commonest : 



* Petals vliUe, twice length of calyx; leaves pinnate. H Nat from Eu. 

 N. officinale, li. Br. Water Cress. Planted or run wild in streamlets, 



spreading and rooting, smooth ; leaflets 3-11, roundish or oblong; flowers 

 all summer ; pods broadly linear, slightly curved upwards on their spread- 

 ing pedicels. Young plants eaten. 



* * Petals ijeUov, little exceeding the calyx; leaves pinnatifid. ® (|) 



N. sessilifl6rum, Nutt. Leaves obtusely incised ; flowers minute, 

 nearly sessile ; pods oblong. Common from Illinois S. 



N. obtilsum, Nutt. Leaves pinnately parted or divided ; flowers 

 minute ; ]io(ls longer than the short pedicels. 111., S. and westward. 



N. paliSstre, DC. M.vrsh Cress. Erect, l^-o^ high, with pinnatifid 

 or lyrate leaves of several oblong, cut-toothed leaflets ; small yellowish 

 flowers ; and small oblong or ovoid pods, mostly shorter than the pedicels. 

 A very connnon homely weed in wet places. 



* * * Petals u-hite, much longer than the calyx ; leaves nndivided or the 



hiircr pinnatifid. 21 



N. laciistre, Gray. Lakk Chess. Acjuatic ; immersed loaves di.ssected, 

 others entire, serrate, or pimiatifid. Lakes and rivers, X. V. to Minn., 

 and S. W. Detached leaves produce new plants, like leaf -cuttings. 



N. Armoracia, Fries. Hokse-r.\i)isii. Leaves very large, oblong, or 

 lanceolate, chiefly from the ground, crenato, rarely cut, or pinnatifid ; 

 pods globular, but seldom seen. Plaiiird or run wild in nuiist snii. The 

 long deep root is a familiar condimenl. 



12. CAMELINA, FALSE FLAX. (Greek: dwarf flax ; the C(nnmon 

 species was fancied to be a degenerate flax.) 



C. sat)ifa, Crantz. Common F. 1°-2- high ; leaves lanceolate, the 

 upper ones sagittate and clasping the stem ; the small pale yellow flowers 

 followed by obovate turgid pods in a long loose raceme ; style conspicu- 

 ous. A weed in jirain and flax fields. 



