Spring Flora of Oklahoma 
13 
crown connecting the lower parts of the fila¬ 
ments. II. Hymenocallis. 
Bulbless herbs, with rootstocks or corms. 
Tall, fleshy-leaved; anthers versatile. 
III. Manfreda. 
Low, linear-leaved; anthers not versatile. 
IV. Hypoxis. 
I. COOPERIA Herb. 
Perianth tube very long and slender, the limb wide¬ 
ly spreading, 6-parted, the short stems borne on the 
throat. Spathe single, membranaceous. Capsule depressed- 
globose. Seeds numerous. Leaves grass-like from a tuni¬ 
cate bulb. 
1. Cooperia Drummondii Herb. Drummond’s Cooperia. Scape 
slender 8'-20' high. Perianth white or rose-tinged, the stalk-like 
tube often 4' in length. 
On prairies. Collected by Stemen and Myers in Oklahoma and 
Comanche counties. April-July. 
II. HYMENOCALLIS Salisb. 
Capsule thin, 2-3-lobed. Seeds usually 2 in each cell, 
basal, fleshy, often like bulblets. Scapes and leaves from 
a coated bulb. Flowers white, fragrant, large, and showy, 
sessile in an umbel-like head or cluster, subtended by 2 
or more scanous bracts. 
1. Hymenocallis oecidentalis (LeConte) Kunth. Hymenocallis. 
Bulb large. Leaves linear-oblong, narrowed at each end, fleshy, 
glaucous, 12'-24' long, 9"-2' wide. Scape stout, equaling or 
longer than the leaves. Bracts linear-lanceolate, XW long. 
Umbel several flowered. Crown funnel-form, narrowed below, its 
margins entire, erose or 2-toothed between the filaments. Filaments 
adnate to the perianth tube. Ovary 3-celled. Ovules 1 or 2 in each 
cavity. 
In moist soil. McCurtain County. May-September. 
III. MANFREDA Salisb. 
Fleshy herbs with bulbiferous rootstocks and bracted 
