128 
Spring Flora of Oklahoma 
1. Androsace occidentalis Pursh. Androsace. Smooth annual. 
Scapes diffuse, l'-3' long. Leaves oblong or spatulate, entire, sessile. 
Calyx-tube obpyramidal in fruit. Corolla very small, white, shorter 
than the calyx. 
In dry soil. April-May. Common. 
II. SAMOLUS (Tourn.) L. 
Annual or perennial, glabrous herbs, with alternate, 
entire leaves, or the basal ones rosulate. Flowers small, 
white, in terminal racemes or panicles. Calyx-tube ad- 
nate to the ovary below, its limb 5-cleft. Corolla perigyn- 
ous, sub-campanulate, 5-lobed or 5-parted. Stamens 5, 
inserted on the corolla, opposite its lobes, alternating 
with as many staminodia. Ovary partly inferior. Cap¬ 
sule globose or ovoid, 5-valved from the summit. Seeds 
minute. 
Racemes sessile or nearly so; staminodia at the sinuses 
of the corolla. 1. S. floribundus. 
Racemes long-peduncled; staminodia wanting. 
2. S. ebracteatus. 
1. Samolus floribundus H. B. K. Water Pimpernel. Erect, 
branched, 6'-18' high. Leaves membranous, l'-3' long, obovate, the 
basal often in a rosulate tuft. Flowers less than a line broad, in 
panicled racemes. Pedicel filiform, bracteolate near the middle. Cap¬ 
sule 1"-1 in diameter. 
In swamps and brooks. May-September. Payne, Lincoln and 
Cleveland counties. 
2. Samolus ebracteatus H. B. K. Stems solitary or tufted, often 
branched. Leaves alternate, spatulate or obovate, sessile or with 
short winged petioles. Flowers in racemes. Calyx campanulate. 
Corolla pink, 3"-4" broad, densely glandular at the base. Capsule 
sub-globose, about 2" in diameter. 
In saline soil along the Cimarron. May-September. 
III. DODECATHEON L. 
Glabrous, scapose, perennial herbs, with entire or re- 
pand basal leaves. Flowers involucrate umbels terminat¬ 
ing scapes. Calyx deeply 5-lobed. Corolla 5-parted, the 
lobes reflexed. Stamens 5, inserted on the throat of the 
corolla. Filaments monadelphous, connivent into a cone, 
