426 



CRUCIFERAE (MUSTARD FAMILY) 



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



5. L. CAMpESTRE (L.) R. Br. Minutely soft doivny ; 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. DrAba L. Perennial, obscurely hoary ; 

 leaves oval or oblong, the upper with broad clasp- 

 ing auricles ; flowers corymbose ; pods heart- 

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

 style. — \yaste places and cultivated grounds ; not common. 

 (Nat. from Eu.) Fig. 747. 



746. L. campestre. 

 Part of fruiting 

 raceme x %. 



747. L. Draba. 

 Part of fruiting 

 raceme x %. 



748. 0. didymus. 

 Leaf and pod x 2%. 



8. COR6nOPUS Ludwig. Wart Cress. Swine Cress 



Pod flattened contrary to the narrow partition ; the two 

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

 Cotyledons narrow and incunibently folded transversely. — 

 Diffuse or prostrate fetid annuals or biennials, with minute 

 whitish flowers. Stamens often only 2. (Name from KopLbvif), 

 crow, and ttoi^s, foot, from the deeply cleft leaves.) Sene- 

 BiERA Poir. 



1. C. DfDYMus (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 Gilibcrt. Leaves less di- 

 vided, with narrower lobes ; pods not notched 

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

 Senebiera Coronopus Poir.) — Ballast, infrequent, 

 much rarer than the preceding species. (Adv. 749. C procumb. 

 from Eu.) Fig. 749. Pod x 22/3. 



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, 

 l'.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., Wye, and Cal. ; local. Aug., Sept. 

 (Eu., Siber.) 



10- CAPSELLA Medic. Shepherd's Pdrse 



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

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

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



1. C. Bursa-past6ri8 (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 ; valvea 

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

 FJowei-s small, yellow. (Name from xaM«^> dwarf, and \Lvov, flax.) 



