184 Cruciferaceae 
4 
dentate or nearly entire. Flowers large, yellow, in elongated racemes. Sepals equal or 
* 

one pair saccate at base. Pod linear, sessile, terete or somewhat 4-sided, not stipitate; 

beak conical or flat; valves |—3-veined. Seeds in | row, globose, not margined. (The 
v 
Latin name of the cabbage.) 
A.  Stem-leaves auriculate and clasping at the base. W. E. 
B. campestris L. (Turnip) " 
AA.  Stem-leaves not auriculate nor clasping. 
B. Pod-beak less than 14 as long as the fertile part, terete; pod glabrous. W. E. 
B. nigra Koch (Black Mustard) 
BB.  Pod-beak 2/3—11/y times as long as the fertile portion, flat or 2-edged. 
C. Pod-beak somewhat 2 edged but not flat; pod glabrous. W. E. 
B. arvensis Kuntze (Wild Mustard) 
CC. Pod-beak flat; pod hairy. W. 
B. alba Boiss. (White Mustard) 
RAPHANUS RADISH 
Annual or biennial, coarse, branching. Leaves pinnatifid, lyrate. Flowers white 
or purple or yellow or pink, showy. Lateral sepals somewhat saccate. Petals large, 
clawed. Pod linear to lanceolate, attenuate upward to a distinct beak, indehiscent, trans- 
versely divided by several false partitions, coriaceous, fleshy or corky. Seed spherical or 
nearly so. (Gk. ra=quickly, phaino=to appear; referring to the rapid germination. ) 
‘A. Flowers white or yellow; dry pod grooved lengthwise; seeds 2-10. E. 
R, raphanistrum L. (Wild Radish) 
AA. Flowers white or pink or purple; dry pod not grooved lengthwise; seeds usually 
Den NY Ee R. sativus L. (Garden Radish) 
BARBAREA (Campe) WINTER-CRESS 
Biennial or perennial, glabrous, erect, branching; stems angled. Leaves entire or 
pinnatifid. Flowers yellow. Sepals often colored, the lateral pair often saccate at base 
and slightly united on the back near the apex. Petals spatulate or clawed. Stamens 
free. Style short; stigma 2-lobed. Pod linear, elongate, somewhat 4-angled. Seeds in | 
row in each cell. (Honor of St. Barbara, who used them medicinally.) 
A. Pod ascending, 2.5—3 cm. long; flowers racemose even when opening. FE. (C- 
barbarea; B. americana.) B. vulgaris R. Br. (Winter Cress) 
AA. Pod appressed, 1—1.5 cm. long; flowers corymbosely aggregated when opening. 
W. B. stricta, Anderz. 
RORIPA (Nasturtium, Radicula) CRESS 
Annual or biennial or perennial, branching: Leaves simple to pinnately compound, 
rarely entire. Flowers white or yellow. Sepals greenish-yellow. Petals short-clawed. 
Stamens |—6. Stigma 2-lobed or nearly entire. Pod short or elongate, terete or nearly 
so, not stipitate; valves usually |-veined, sometimes veinless. Seeds minute, turgid, wing- 
less, in 1—2 rows in each cell. (Said to be from Celtic ros—dew, ripa—a bank; refer- 
ring to the habitat of some species.) 
A. Flowers white; leaves either pinnately divided or else very large. 
B. Leaves all pinnate; basal leaves 7.5—15 cm. long; pod linear; roots with mild 
radish taste. W.E. (Nasturtium officinale.) 
R. nasturtium Rus. (Water-cress) 


