6 
Spring Flora of Oklahoma 
I. YUCCA L. 
Plants with woody and leafy stems, or short caudex. 
Leaves linear or lanceolate, usually rigid and sharp- 
pointed, bearing long, marginal thread-like fibers. Flow¬ 
ers large, bracted, nodding in terminal raceme or panicle. 
Perianth bell-shaped, or nearly globular, greenish-white, 
6 ovate or ovate-lanceolate separate segments. Stamens 
hypogynous, shorter than the perianth, filaments thick¬ 
ened above, often papillose. Anthers small. Ovary 
sessile, 3-celled, or becoming 6-celled, 3-angled, many- 
ovuled. Fruit an oblong, 3-angled, many seeded, dehis¬ 
cent capsule. 
1. Yucca glauca Nutt. BIear-grass. Soapweed. Leaves very 
stiff, and sharp-pointed, l°-3° long, 3"-6" wide, margin fibers fili¬ 
form. Raceme mostly simple, l°-6° long. Flowers 1*4'-3' broad. 
Stigmas green, shorter than the ovary. Capsule 6-sided, 2'-3' long, 
about 1' thick. 
In dry soil. Common. May-June. 
II. ALLIUM (Tourn.) L. 
Flowers perfect, umbellate. Style single, long. Flow¬ 
ers white, pink, purple, or greenish. Perianth of 6 sepals, 
often becoming dry and persistent. Leaves and scape 
rising from a coated bulb; leaves linear, lanceolate- 
oblong, or lanceolate. In one species flowers replaced 
by bulblets (A. Canadense ). Plants with the odor of 
onions. 
Bulb-coats membranous, not fibrous-reticulated. 
1. A. stellatum. 
Bulb-coats fibrous-reticulated. 
Capsule not crested. 
Flowers mostly replaced by bulblets; scape 8'-24' tall. 
2. A. canadense. 
Flowers rarely replaced by bulblets. 
Scape 12'-24' tall; pedicels 8"-12" long; perianth- 
segments thin. 3. A. mutabile. 
Scape 4'-8' tall; pedicels 4"-6" long. 
Bulbs usually solitary; perianth-segments ovate, 
acute or acuminate. 4. A. Nuttallii. 
