426 



CRUCIFERAE (MUSTARD FAMILY) 



* * Stem-leaves with a sagittate partly clasping base, rather crowded. 



5. L. CAMPESTRE (L.) R. Br. Minutely soft downy ; leaves 

 arrow-shaped, somewhat toothed ; pods ovate, winged, rough, 

 the style longer than the narrow notch. 



Fields, roadsides, etc. , becoming common. (Nat. 

 fromEu.) FIG. 746. 



6. L. DR\BA L. Perennial, obscurely hoary ; 

 leaves oval or oblong, the upper with broad clasp- 

 ing auricles ; flowers corymbose ; pods heart- 

 shaped, wingless, thickish, entire, tipped with a conspicuous 

 style. Waste places and cultivated grounds ; not common. 

 (Nat. from Eu.) FIG. 747. 



746. L. campestre. 



Part of fruiting 



raceme x %. 



747. L. Draha. 

 Part of fruiting 

 raceme x *' t . 



748. C. didymus. 



8. COR6NOPUS Ludwig. WART CRESS. SWIVE CRESS 



Pod flattened contrary to the narrow partition ; the two 

 cells indehiscent, strongly wrinkled or tuberculate, 1-seeded. 

 Cotyledons narrow and incumbently folded transversely. 

 Diffuse or prostrate fetid annuals or biennials, with minute 

 whitish flowers. Stamens often only 2. (Name from /coptfvi;, 

 crow, and a-ofa, foot, from the deeply cleft leaves.) SENE- 

 BIERA Poir. 



1. C. DfDYMtrs (L.) Sm. Leaves 1-2-pinnately parted; 

 pods notched at the apex, rough-wrinkled. (Senebiera Pers.) 

 Waste places, chiefly near ports. (Adv. from the Old 

 World and now widely distributed as a cosmo- 

 politan^ weed.) FIG. 748. 



2. C. PROCUMBENS Gilibert. Leaves less di- 

 vided, with narrower lobes ; pods not notched 

 at the apex, tubercled. (C. Coronopus Karst. ; 

 Senebiera Coronopus Poir.) Ballast, infrequent, 



much rarer ^.han the preceding species. (Adv. 749. C. procumb. 



Leaf and pod x 2%. from Eu.) FIG. 749. 



Pod x 2%. 



9. SUBULARIA L. AWLWORT 



Pod ovoid or globular, with a broad partition ; the turgid valves 1 -nerved. 

 Seeds several. Cotyledons long and narrow, incumbently folded transversely, 

 i.e. , the cleft extending to the radicular side of the curvature. Style none. 

 A dwarf stemless perennial, aquatic ; the tufted leaves awl-shaped (whence the 

 name). Scape naked, few-flowered, 2-8 cm. high. Flowers minute, white. 



1. S. aquatica L. The only species. Margins of lakes and slow streams, 

 Nfd. to B.C., south w. to centr. N. E., Wyo., and Cal. ; local. Aug., Sept. 

 (Eu., Siber.) 



10. CAPSELLA Medic. SHEPHERD'S PURSE 



Pod obcordate-triangular, flattened contrary to the narrow partition ; the 

 valves boat-shaped, wingless. Seeds numerous. Cotyledons incumbent. 

 Annuals; petals small, white. (Name a diminutive of capsa, a box.) 



1. C. BURSA-PASTORIS (L.) Medic. Stem-leaves arrow-shaped, sessile. 

 (Bursa Britton.) Common weed; Apr.-Sept. (Nat. from Eu.) Extremely 

 variable in foliage and outline of pod. Upon these characters Almquist has 

 proposed sixty-three forms or elementary species. 



11. CAMELINA Crantz. FALSE FLAX 



Pod obovoid or pear-shaped, pointed, margined ; partition broad ; valves 

 1-nerved. Seeds numerous, oblong. Cotyledons incumbent. Style slender. 

 Flowers small, yellow. (Name from x a A"*'i dwarf, and \lvov, flax.') 



