MUSTARD FAMILY. 193 



reticulate, the teeth at the apex short and obtuse; fruiting pedicels ascending, 

 scarcely exceeding % line. — (L. menziesii of Bot. Cal.) 



Common in hard beaten soil, by paths and waysides, throughout California. 

 Naturalized from South America. 



4. L. latipes Hook. Long-winged Pepper-grass. Stems several from 

 the base, very thick and stout, 1 to 2 in. long, recurved-prostrate ; herbage 

 slightly pubescent; leaves pinnatifid with few linear often toothed segments, 

 3 to 5 in. long, the rachis ligulate, 2 lines broad, often dilated into a terminal 

 lanceolate lobe; segments remote, 5 to 6 lines long; racemes very dense and 

 often capitate, % to l 1 /^ in. long; petals broadly spatulate, greenish, rounded 

 at the apex, 1 line long, much exceeding the short sepals; silicles broadly 

 oblong or oval, 3 lines long, 2 lines broad, strongly reticulated, sparingly pubes- 

 cent, winged at apex with two broad acute teeth nearly as long as the body, 

 the sinus between the teeth or wings a narrow cleft. 



Beds or margins of winter pools on the plains or in alkaline flats: Willows; 

 College City; Round Valley; St. Helena; Elmira; Martinez; Hollister and 

 southward to Southern California. Mar. -May. 



5. L. dictyotum Gray. Branches several from the base, decumbent, or 

 at length ascending, 1 to 2 in. long; leaves pinnatifid, the segments few, linear 

 and remote; petals little exceeding the sepals or wanting; silicles \y 2 lines long, 

 broadly elliptic, finely reticulated, pubescent, with short obtuse wings or teeth 

 at the summit, the sinus narrow; pedicels ascending, flattened. 



Alkaline soils from Alameda (ace. to Greene) and Livermore southward 

 to Southern California. Mar.-Apr. 



6. L. strictum Rattan. Branching from the base, the branches compara- 

 tively simple, suberect or diffuse, 4 to 12 in. high; leaves with few pinnate 

 segments or entire; stamens 4; silicles glabrous, lightly reticulated, 2 to 2% 

 lines long, with 2 widely divergent lanceolate wings or teeth at apex often y 2 

 as long as the elliptic body; pedicels flattened, in fruit rather shorter than the 

 pod. 



Lower San Joaquin Valley and the Montezuma Hills. 



7. L. oxycarpum T. & G. Very slender, branched from the base, the 

 branches elongated, erect or ascending, 4 to 6 in. long, bearing flowers more 

 than half their length; leaves narrow, linear and subentire, or pinnatifid with 

 a few acute linear segments ; sepals very unequal, caducous, y 2 line long ; petals 

 none; stamens 2; silicles roundish, glabrate, finely reticulated, iy± lines long, 

 tipped with 2 very short and acute widely divergent teeth; pedicels widely 

 spreading or retrocurved, very slender, flattened, \y 2 lines long. 



19. CORONOPUS Gaertn. 



Prostrate annuals (exhaling a heavy-scented odor), with pinnatifid leaves and 

 short racemes of minute greenish white flowers. Sepals oval, equal at base, 

 spreading. Stamens often only 2 or 4. Silicle small, more or less didymous, 

 flattened contrary to the narrow partition, the surface strongly wrinkled or 

 tuberculate ; valves of the pod falling away at maturity from the persistent 

 axis as closed or nearly closed nutlets. Cotyledons incumbent. (Greek 

 korono, crow, and pous, foot, because of the shape of the leaves.) 



Fruit notched at summit and at base, strongly didymous, wrinkled 1. C. didymiis. 



Fruit not notched above, obscurely didymous, strongly roughened and cristate-muricate 



2. C. ruellii. 



1. C. didymus (L.) Smith. Wart-cress. Herbage heavy-scented, sparse- 



