Spring Flora of Oklahoma 
143 
flowers. Calyx 5-lobed or 5-parted, spreading. Corolla 
campanulate or nearly cylindric, usually with 5 minute ap¬ 
pendages on the tube within. Ovary I-celled. Styles united 
below. 
1. Nyctelea Nyctelea (L.) Britton. Nyctelea. Sparingly hir¬ 
sute-pubescent. Stem 4'-12' high. Leaves pinnately divided, 2'-4' 
long, ovate-oblong in outline, the upper alternate, the lower opposite, 
the segments dentate, entire or lobed. Peduncles 1-flowered, op¬ 
posite the leaves. Calyx becoming 8"-14" broad in fruit. Capsule 
globose, 2"-3" in diameter. 
In moist soil. April-July. Oklahoma County. 
III. PHACELIA Juss. 
Annual, biennial or perennial, mostly hirsute or scabrous 
herbs. Leaves alternate, sometimes simple, but in most 
species lobed or divided. Flowers in one-sided clusters, 
often showy. Calyx 5-parted, without appendages. Co¬ 
rolla with 5 spreading lobes. Ovary 1-celled, with narrow 
placentae. 
Appendages of the corolla tube between the stamens 
conspicuous. 
Stamens longer than the corolla. 1. P. intergrifolia. 
Stamens shorter than the corolla. 2. P. brevistylis. 
Appendages of the corolla-tube inconspicuous. 
3. P. dubia. 
1. Phacelia integrifolia Torr. Crenate-leaved Phacelia. An¬ 
nual or biennial. Stem stout, leafy, viscid-hirsute. 6'-24' high. 
Leaves finely strigose-pubescent, ovate-oblong or oblong-lanceolate, 
crenate-dentate. Scorpioid cymes dense, 2'-4' long. Flowers sessile, 
about 4" long. Corolla tubular-campanulate, white or blue. Capsule 
ovoid. 
In saline soil. April-September. 
2. Phacelia brevistylis Buckl. Biennial, softly hirsute below, 
glandular-pilose above. Stems 5'-16' tall. Leaf-blades pinnately di¬ 
vided, the segments coarsely incised or pinnatifid. Corolla 2"-4" 
broad. Filaments pubescent. Capsules depressed, about 2" long. 
On shaded slopes. April-July. 
3. Phacelia dubia (L.) Small. Small-flowered Phacelia. An¬ 
nual, puberulent or glabrate, branched from the base, the branches 
