CRUCIFEE^. 253 



Flowers rose-color or purple. Calyx nearly equal at base. Petals 

 entire, unguiculate. Pod broadly linear or ensiform, acuminate, nearly 

 flat; valves with a prominent nerve. Seeds rather few, margined or not 

 so; cotyledons various. 



1. P. Meuzlesii, Greene. Hook. Fl. i. 60 (1830), and Bot. Beech. 322. 

 t. 75, under Jlesperis. Phivnicaulis cheiranlhoides, 'Nntt.; T. & G. Fl. i. 

 89 (laSS): P. ]\Ienziesii, Greene, Bull. Torr. Club, xiii. 143 (1886). Cheir- 

 authus Menziesii, Wats. Bot. King, 14 (1871). Caudex branching, partly 

 subterranean and densely clothed with the persistent petioles of former 

 seasons : radical leaves broadly oblanceolate or narrowly obovate, obtuse 

 or abruptly acute, entire, 2 — 4 in. long, canescent with a stellate pubes- 

 cence: cauline reduced to bracts: scape-like stems several from each 

 branch of the caudex, decumbent, 6 — 10 in. high: calyx 2 lines long: 

 corolla 4—5 lines, bright red-purple: anthers oblong: pods 1 — 2 in. long, 

 broad, not carinate, narrowed to the slender style : seeds oval, margin- 

 less. — In the Sierra, northward chiefly. Apr., May. 



10. ARABIS, Linnxus. Sepals erect, equal, or two of them slightly 

 saccate at base. Petals white or purple, with narrow claw and flat blade. 

 Stamens tetradynamous; anthers short, straight, ovate or oblong, scarcely 

 emarginate at base. Stigma entire or 2-lobed. Pod linear, compressed; 

 valves nerveless or lightly 1-nerved. Seeds in 1 or 2 rows, flattened, 

 often winged; cotyledons accumbent. — As received, this is an altogether 

 conventional genus embracing plants very diverse in aspect, the groups 

 probably without real congeneric affinity. 



* Biennials; pods linear, ascending or erect. 



1. A. glabra, Weinm. Cat. Dorp. 18 (1810); Linn. Sp. PI. ii. 666 (1753), 

 under Turrilis: A. perfoliala, Lam. Encycl. i. 219 (1783). Stout, usually 

 simple, 2 — 5 ft. high; lowest leaves and base of stem hirsute or hispidu- 

 loiis, the plant otherwise glabrous, glaucous: lower leaves spatulate, 

 2 — 4 in. long, sinuate-pinnatifid or toothed, ciliate at least on the petioles; 

 cauline ovate or ovate-lanceolate, entire, clasping by a sagittate base: 

 petals dull-white or greenish-white, 2 — 3 lines long, little exceeding the 

 sepals : pods erect, usually even appressed to the stem, 2 — 4 in. long, less 

 than a line wide, straight on pedicels 3—4 lines long: style short: seeds 

 in 2 rows, narrowly winged or wingless. — Common, and of rank growth 

 in western California; of wide distribution both in Europe and N. America. 



2. A. repanda, Wats. Proc. Am. Acad. xi. 122 (1876). Stem stout, 

 2 ft. high, with few-spreading somewhat flexuous branches; pubescent 

 with coarse and loose branched hairs: leaves obovate to oblanceolate, 

 obtuse, 3 -4 in. long, coarsely sinuate- or repand-toothed, narrowed to a 

 broad petiole: calyx !}{ lines long, little surpassed by the pinkish 

 petals: pods ascending, 3 in. long, 1 — IJa lines wide; style very short: 



