218 



CRUCIFER.E. 



upper side adherent to the midrib, the lower lobe free; upper leaves 

 mostly toothed, or with a few small lateral segments; flowers 8 or 9 

 lines broad, purple or white; pod thick, spongy at maturity, 3 to 4 

 lines broad, 1 to 3 in. long, with one to several constrictions, or the 

 body of the pod globose and 1-seeded. 



Common weed of waste places in towns and villages about San 

 Francisco Bay; less frequent in the interior. Naturalized. 



2. R. Raphanistrum L. Jointed Charlock. Plants 1£ to 2 

 ft. high, almost glabrous throughout; lower leaves deeply lyrate- 

 pinnatitid, 4 to 7 in. long, the upper less lobed; flowers 6 to 9 lines 

 broad, yellow or white; pods 1 to in. long, 6 to 10-seeded, strongly 

 constricted between the seeds, longitudinally grooved. 



Introduced from Europe but very rare and scarcely established: 

 San Francisco; Berkeley. 



7. ERYSIMUM L. Wall Flower. 

 Erect stoutish biennials or perennials, simple or with few branches. 

 Leaves narrow, entire, dentate or lobed. Flowers large, orange to 

 light yellow. Sepals narrow, equal at base or the lateral saccate. 

 Petals with slender claws and obovate blades. Pod linear, flattened, 

 with 1-nerved valves, or quadrangular. Seeds in 1 row, numerous, 

 not margined. (Greek name of a garden plant.) 



Flowers orange ; pod 4-sided; montane species 1. E. asperum. 



Flowers cream-color or yellowish; pod flattened parallel to the partition; 

 littoral species 2. R. capitatum. 



1. E. asperum DC. Western Wall-flower. Herbage sca- 

 brous-pubescent, hairs stellately 3-parted; stems erect, simple or 

 branching above, 1} to 1\ ft. high, rather densely clothed with 

 leaves below; leaves narrow (2 to 6 lines wide and 3 to in. long, or 

 the uppermost shorter), entire or sharply dentate, the lower slender- 

 petioled; flowers orange, 10 lines in diameter; blade of petal broadly 

 elliptic; sepals narrow, with a longitudinal dorsal ridge; pods 

 4-sided, ascending or widely spreading, commonly 3 to 4 in. long, 

 1 line wide, beaked with a stout style; seeds oblong, often slightly 

 winged at one end. — (E. Californicum Greene.) 



Common on rocky hills in the mountains of the Coast Ranges ami 

 Sierra Nevada. Mar.-Apr. 



2. E. capitatum (Dougl.) Greene. Stout and low, erect, \ to \\ 

 ft. high, leafy, finely pubescent; leaves narrow, entire or repand- 

 dentate; flowers cream-color to yellowish, rarely white, at first sub- 

 capitate, the axis elongating in fruit and becoming a short raceme; 

 pods \\ to 2^ in. long, \\ lines wide, abruptly short-pointed; valves 

 flattish, 1-nerved; seeds brown, sometimes margined but not winged — 

 (E. grandiflorum Nutt. ) 



Vicinity of the ocean along the California coast. 



8. ARAB IS L. Hock Crkss. 

 Ours erect and tall annuals or biennials, or cajspitose perennials. 

 Flowers rose-purple, white or yellowish white. Sepals greenish or 



