9. Draba Le 
Low herbs with entire or toothed leaves. Flowers white or yellow. 
Filaments not toothed. Capsule commonly oval or oblong, flattened, the 
valves plane or slightly convex, nerveless. Seeds several or numerous in 
&@ rows in each chamber, neither margined or winged. 
0 Anmals with a small tap root; leaves in a rosette at 
the base, flowering stems naked or with a few leaves 
7 ee the lower parts 
2 Leaves wholly in a basal rosette; pods oval, 6=7x2.5 
6. mm.,glabrous$ flowers white 1.D- verna 
7, Leaves largely basal but some in the lower nodes of 
the flowering stems 
4 Flowers and fruit disposed chiefly toward the 
G (apex of the stems; pods oblong, 12-15x2 TM 4 
ee eece. flowers white Ze De caroliniana 
4 Flowers and fruit distributed throughout the 
¢ stems; pods oblong, 6-12x1.5-2.5 mm. glabrous 
or pubescent; flowers yellow 
Pp 
( Pods glabrousj91.5 mne wide; leaves chiefly stenoloba 
Ww . /oO basal Se De iteindeivabge 
6 Pods hairy, 1.5-2.5 mn. wide; leaves more — 
/o>commonly cauline 4, D. nemorosa 
O Perennials, caespitose, the leaves imbricated in dense 
«j tufts 
& Pods 1.5 mn. wide, more or less twisted Se De lonchocarpa 
Pods 3 mm. wide, plane» 6, D. laevicapsula 
1. De vérna Le Whitlow Grass. Low anmals, 3=fem. tall, the 
leaves in a dense rosette, oblanceolate to spatulate, less frequently oval, 
ra cme long, entire or with one or two obscure teeth, both surfaces rough with 
a stellate pubescence; flowering stems Simple ,5=10 cm. long, glabrous except 
at the base; flowers white, 3 mm. in diameter, sepals thinly hirsute, scariouse =i 
margined, the petals deeply 2-cleft, somewhat exserted; pods 6-7 mn. long, 
2eD MMe wide, oval or elliptical, glabrous, tho persistent Style scarcely 
evident, on slender, ascending pedicels 8=15 mn, long; seeds neither margined 
nor winged. 
a 
-~ <i 
Gravelly prairies at low elevations, \Probably’ our plant is\ var. 
aestivalis Lejeune (cf. Rhod. 36: 370e .1934.), 4 
I nt ent eT 
W | 
a) 
