ML^STAltD FAMILY. 59 



§ 1. Fruit a true pod, opeuiiuj lengthwise by tivo valves, which fall away and leave the 



thin, persistent partition when ripe. 

 * I 'od flattened jiarallel to the partition ; the seeds flat or flatlish ; seed-leaves edgeivise 



to their stem. 

 +- Pod broadly oblong or oval, large and very flat ; seeds -'-i in each cell in 2 rows. 

 1. LUNAltlA. Seeds winged. Large pod stalked in tlie calyx. Flowers purple, rather 



large. 



-!- -(- Pod oblong or linear ; seeds in 1 rotv. 

 ++ Valves nerveless. 



2. LEAVENWORTHIA. Stems scape-like, 1-few-flowered. Seeds winged. Small 

 annuals. 



S. DENT ARIA . Stems naked below, 2-5-leaved above, from a horizontal, fleshy, scaly root- 

 stock. Seeds wingless. 



4. CARDAMINE. Stems leafy, from a fibrous root, or at least not froui a scaly rootstock. 



Seeds wingless. ^^ ^^ Valves with a prominent midrib. 



5. MATTHIOLA. Stigma deeply 2-lobed. Seeds as broad as the partition, winged. 



Flowers large and showy, white to purple. 



6. AKABIS. Stigma only slightly, or not at all, 2-lobed. Seeds -winged or margined. 

 ■>-■*-+- Pod linear, oblong, or even round oval, but the seeds in 2 rows. [See, also, 



Arabis.] 

 T. DEABA. Seeds wingless, numerous. Pods flat, various in shape. Flowers small and 



(in ours) white. 

 6. ALYSSUM. Seeds winged, 2-4. Pods flat, roundish. Flowers small, yellow or white. 

 * * Pod globular, or cylindric, or 4-angled by the prominent mid-nerves ; seeds wing- 

 less. \Matthiola may be sought here.] 

 ~ Pod globular or cylindric. 

 ■^■^ Valves nerveless ; cotyledons accumbent. (Lessons, Figs. 425, 426.) 

 9. LESQUEPvELLA. Pod about 4-st'eded. Low, hoary plants with mostly yellow, 

 small flowers. 



10. AUBRIETIA. Pod many-seeded. Stronger, hoary, with purple, rather large flowers. 



11. NASTURTIUM. Pod many-seeded. Aquatic or marph plants, hairy or smooth, and 



small yellow or white flowers. 



+1--H- talves nerved; cotyledons incumbent. (Lessons, Figs. 427, 428.) 



12. CAMELINA. Pod turgid, obovate, or pear-.shaped. Weed, usually in flax. 



-i- -H Pod linear. 



■H- Cotyledons accumbent. 



(11. NASTURTIUM.) Valves nerveless. .Marsh or aquatic plants. 



13. CHEIRANTHUS. Valves with a strong mid-nerve. Lateral sepals sac-like at base. 



Leaves entire and flowers showy. 



14. BARBAREA. Valves with strong mid-nerve. Sojjals nearly equal and alike. Leaves 



lyrate or pinnatifld. 



■»+ +^ Cotyledons incumbent. (Lessons, Figs. 427, 42S.) 

 = Flowers purple or rose-colored, or, if white, large. 



15. HESPERIS. Stigma with 2 erect blunt lobes. Flowers pink-purple. Hau-s glandular. 

 10. MALCOLMIA. Stigma with 2 pointed lobes. Hairs glandless. 



17. TIIKLYPODIUM. Stigma entire. 



^ Flowers yelloio, or, if white, very small. 

 IS. ERYSIMUM. Stigma rather large and 2-lobed. Loaves simple. 



19. SISYMBRIUM. Stigma small and entire. Leaves twice pinnatifld. 



++++++ Cotyledons conduplicate. 



20. BR.ASSICA. Pod more or less beaked. Flowers yellow. 



