218 



CEUCIFERiE. 



uppei- 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 IJ to 2 

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

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

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

 constricted between the seeds, longitudinally grooved. 



Introduqed from Europe but very rare and scarcely established: 

 San Francisco; Berkeley. 



7. ERYSIMUM L. Wall Flowek. 

 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. E. capUatum. 



1. E. asperum DC. Westbkn Wall-flowbk. Herbage sca- 

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

 branching above, IJ to 2J ft. high, rather densely clothed with 

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

 the uppermost sliorter), 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 Eanges and 

 Sierra Nevada. Mar.-Apr. 



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

 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 IJ to 2J in. long, IJ 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. ARABIS L. KocK Ckess. 

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

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



