38 
Spring Flora of Oklahoma 
of the leaves. Involucre 5-lobed, becoming enlarged and 
reticulate-veined after flowering. Perianth campanulate, 
its tube constricted above the ovary, its limb corolla-like, 
deciduous. Stamens 3-5, generally 3, unequal, hypogy- 
nous. Fruit obovoid or clavate, strongly ribbed, pub¬ 
escent in most species. 
Leaves sessile or nearly so, lanceolate to oblong. 
1. A. albida. 
Leaves manifestly petioled, ovate, often cordate. 
2. A. nyctaginea. 
1. Allionia albida Walt. Pale Umbrella-wort. Stem erect, 
furrowed or striate, 4-sided below, 12'-36' tall, glabrous or short- 
pubescent above, or pubescent to the base, the peduncles and branches 
commonly glandular and viscous. Leaves lanceolate or oblong-lance¬ 
olate, 3-veined from the base, glabrous, pubescent or ciliate. Invol¬ 
ucre much enlarged in fruit, pubescent, ciliate, becoming whitish 
and purple-veined. Perianth pink, white or lilac. Fruit with hispid 
ribs, roughened in the furrows. 
In dry soil. May-August. 
2. Allionia nyctaginea Michx. Heart-leaved Umbrella-wort. 
Stems angled, often 4-sided below, glabrous or slightly pubescent, 
12'-36' tall. Leaves broadly ovate to oblong, acute at the apex, 
cordate, rounded, truncate or narrowed at the base. Peduncles and 
pedicels commonly pubescent. Involucre shorter than the flow T ers. 
Perianth red. Fruit oblong or narrowly obovoid, very pubescent. 
In dry soil. Common. May-August. 
FAMILY 20. AIZOACEiE. Carpet-Weed Family. 
Mostly fleshy herbs, mainly natives of Africa. Stems 
prostrate and branching, with opposite or verticillate 
leaves and solitary, cymose, or glomerate perfect, small, 
regular flowers. Ovary usually free from the calyx, 3-5- 
celled, and ovules numerous in each cell. 
I. MOLLUGO L. 
Low, branching annuals. Sepals 5, greenish outside, 
white inside. Corolla wanting. Stamens 5, alternate with 
