970 BRASSICACEAE 
Pod with a very short stout beak: leaves with many small . 
SE p-toothed or angulate segments. 2. L. uniflora. 
Pod with a long slender beak, 1-3-seeded, elliptic or linear- 
elliptic 3. L. stylosa. 
Pod narrowly linear, torulose. 4. L. torulosa. 
E ud x Leaf- cd ais few blunt-lobed d pong pedicels be- 
ming 3 ong: sepal mm. long: petals 5—7 mm. long, white or 
purplish, Eno the yellow dd a linear 
2—2.5 em. long: seed with a eie Sa radicle, 
= Rocks, often NA patient various provin 
N of Coastal Plain, Ala. to Tex., Ark., and 
Tenn. 
2. L. uniflora (Michx.) Britton. Leaf- 
] etals 
long, white with a nd dd Or porous 
ded linear-elliptic, 2.5 long: s 
an oblique radicle. AL. Michaunxit 
To: ES —Dry soil or ii rocks, often cal- 
eareous, various provinces N of Coastal 
Plain, Ala. to Ark., Mo., “and Ind. 
3. L. stylosa A. Gray. E blades with 3-7 entire or _angled di i 
pedicels becoming 3-15 em. long: petals yellow: pod ellip tic, 12 mm. lon 
Cedar glades, on Boso. rocks, Interior Low Plateaus, Tenn. 
L. torulo osa A. Gray. Leaf-blades with entire angled or lobed d gh 
vodiocls becoming 9—20 em. long: petals purplish with a yellow base: pod n 
rowly linear, 2—5.5 em. long —Moist Cedar Er Interior Low Plateaus, N 
Al enn., and Ky. 
28. ARABIS L. Annual or perennial herbs. Leaf-blades entire, toothed, 
or te Sepals 4, erect, broad or narrow. Petals 4, white, pink, purple, 
or yellowish, as long as the sepals or much longer. Stamens 6: pose ovoid 
to ellips seid or sagittate. Style very short or obsolete. Pod elongate.—A bout 
120 species, natives of the Northern Hemisphere.—Spr._sum.—R0OCK-CRESSES. 
SPIKED-CRESSES. 
Seed winged, sometimes only so at the a 
Pods erect, ascending, or Bniaadine. P raight. I. VIRGINICAE. 
Pods recurved, nodding, or drooping, curved. II. LAEVIGATAE. 
Seed wingless III. LYRATAE 
I. VIRGINICAE 
Low plants, ultimately much-branched at the base and diffuse: 
lower leaves B deeply pinnatifid blades 1. A. virginica. 
Taler plants, ple or sparingly br ached ‘at the base, erect or 
nearly 25s SONET leaves with merely bu blades 
Stem and leaves P ide d pubescent: pod Sp cadino: 
sepals becoming long: BEI. broadly spatulate. 2. A. patens. 
Stem ed leaves Inconspicuouets pubescent: pod erect: sepals 
ec 
becoming 2 long: petals narrowly spatulate 
Petals fully twice as long as the sepals: anthers sagit- 
tate: pod 4.5 em. long or more: style 1 mm. long. 3. A. georgiana. 
Petals less than twice as long as the sepals: anthers 
ovoid: pod 4 em. long or less: style obsolete. 4. A. ovata. 
II. LAEVIGATA 
Outer sepals narrow, linear » elliptietinear: iene glabrous, 
mostly glaucous: pod 1-2 wide. 
Se a PO R broadly winced all around: petals 6-8 
. long. 5. A. Burkii. 
