UUDRJI 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. 

 *ith a stalk. Seed-stalk adhering to the partition. Foreign, ornamental 

 plants. 



L. redivi'va. Perennial S. Pods lanceolate, narrowed to each end. Lvs. sharp 

 toothed. ~n. 



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

 toothed. @ 



3. CAPSEL'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? g-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 two ear-shnped stem-clasping lobes 

 at base. Flowers very small, in racemes which become very long, and arc 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 lobcd. Pods round. Gardens. July. 



2 L Virginicum. Tbnffvt-frou. Pods round, wingless. Stem leaves toothed. 



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



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



5. SEXEBIE'RA. Swine Cress. 



Silicle 2-lobed, appearing double. Valve somewhat turgid and indo 

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

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



