52 
Spring Flora of Oklahoma 
1. Draba caroliniana Walt. Carolina Whitlow-grass. Winter 
annual. Flowers white. Petals entire. Pods linear, longer than the 
ascending pedicels. Flowering stems l'-5' high. Leaves obovate and 
entire, clustered at the base, or only a short distance up the stem, 
beset with stellate pubescence. 
In sandy fields. March-June. Common. 
2. Draba cuneifolia Nutt. Wedge-leaved Whitlow-grass. Flow¬ 
ers white. Petals emarginate. Pods oblong-linear, minutely hairy, 
longer than the horizontal pedicels. Flowering stems 4'-8' high, 
branching and leafy below. Leaves obovate, cuneate, or the lowest 
spatulate, dentate toward the summit. 
In fields. February-April. Common. 
3. Draba brachycarpa Nutt. Short-fruited Whitlow-grass. 
Flowers yellow. The oblong pods l"-2" long. Basal leaves 4"-6" 
long, ovate or obovate, stem leaves oblong and entire. 
Dry hills and fields. March-May. Common. 
II. LESQUERELLA S. Wats. 
Low, annual or perennial herbs, with stellate pubescence, 
simple leaves, and racemose, mainly yellow, flowers. Petals 
entire. Pod generally inflated, globose or oblong. Valves 
nerveless. Seeds few or several, in 2 rows, flat. Cotyle¬ 
dons accumbent. 
Annual. 
Filaments more or less dilated below; foliage hispidly 
stellate. 1. L. densiflora. 
Filaments very slender or linear-subulate; foliage 
compactly canescent or scaly-stellate. 
2. L. gracilis. 
Perennial. 3. L. ovalifolia. 
1. Lesquerella densiflora (A. Gray) S. Watts. Densely canes¬ 
cent annual. Stem branched at base, 4'-12' long. Leaf blades spatu¬ 
late to lanceolate or oblong, entire or repand, the lower with petioles, 
the upper sessile. Corymbs rather densely flowered. Pedicels 3"-5" 
long, ascending. Petals broadly spatulate, 4"-5" long. Filaments 
slightly dilated for 1-3 their length. Pods sub-globose, 2" in diameter, 
glabrous. 
In dry soil. May-June. Southern. 
2. Lesquerella gracilis (Hook.) S. Watts. Slender Bladder-pod. 
Slender, sparingly stellate-pubescent annual, much branched, 10'-24' 
tall. Leaves linear or oblanceolate, the lower slightly petioled, the 
