Oedek 13.— the CRUCIFERS. 165 



2. LUNA'RIA. Satin-flower. 



Sepals somewhat 2-lobed at base of the flower. Petals nearly entire. 

 Stamens without teeth. Silicle oval or lanceolate, flat, usually very large, 

 with a stalk. Seed-stalk adhering to the partition.— Foreign, ornamental 

 plants. 



L. rediviVa. Perennial S. Pods lanceolate, narrowed to eaeli end. Lvs. Hliarp 



toothed, n. 

 Ik bien'nis, Biennial S. Pods broad-oval, rounded at each end. Lvs. bhmt- 



toothed. @ 



3. OAPSEL'LA. Shepherd's-purse. 



Calyx equal at base. Silicles triangular, wedge-shaped at base, notched 

 at top, compressed laterally, that is, contrary to the narrow partition. 

 Valves boat-shaped. Style short. Seeds 00, oblong, small. — A common 

 weed, with white flowers. 



C. Bursa-Pasto'ris. Shepherd^ s-purse. Found everywhere, in fields, pastures, and 

 road-sides. Stem growing to a foot in height, hairy below, branching. Root 

 leaves many (when the plant has room), half a foot long, deeply-lobed and 

 toothed. Stem leaves much shorter, with tv\^o ear-shaped stem-clasping lobea 

 at base. Flowers very Bmall, in racemes which become very long, and are suc- 

 ceeded by the little purse-shaped pods. Apr-Sept. (See Fig. 331.) 



4. LEPID'IUM. Pepper-grass. 



Sepals ovate. Petals ovate, entire. Silicles roundish or oval, notched 

 at the end, flattened contrary to the very narrow partition. Cells 1 -seed- 

 ed. Valves boat-shaped, dehiscent. Flowers white, racemed, numerous. 



1 Stem leaves undivided. Flowers from June to Sept 2 



1 L sativum. Leaves all divided and lobed. Pods round. Gardens. Juli/. 



2 L Virginicum. Tongue-grass. Pods round, wingless. Stem leaves toothed. 



3 L rudera'le. Pods roundish-oval, wingless. Petals 0. Stem leaves entire. W, 



4 L campes''tre. Pods ovate, winged, rough-scaly. Leaves arrow-shaped. W. 



5. SENEBIE'RA. Swine Cress. 



Sihcle 2-lobed, appearing double. Valve somewhat turgid and inde 

 hiscent. Cells each with 1 roundish and 3-cornored seed. Flowers 

 white, in short racemes which stand opposite to the leaves. 



