84 
Spring Flora of Oklahoma 
8"-10" long. Petals rose-purple or white, 3 times as long as the 
sepals. Capsule ovoid, 2" in diameter. 
In woods and open places. May-June. Common. 
II. XANTHOXALIS Small. 
Low herbs, with horizontal rootstocks sometimes bear¬ 
ing fusiform tubers. Stem erect or decumbent. Leaves 
alternate, palmately 3-foliolate. Leaflets broadly obcordate, 
usually inequilateral. Corolla yellow, sometimes with a 
darker eye. Stamens 10. Filaments glabrous, or the longer 
ciliate. Capsule elongated, 5-celled. 
Stem appressed-pubescent; not creeping. 1. X. stricta. 
Stem loosely pubescent; a plant with creeping stems. 
2. X. corniculata. 
1. Xanthoxalis stricta (L.) Small. Upright Yellow Wood-sor¬ 
rel. Plants low, and erect, pale green. Stem branched at the base. 
Leaflets closing when touched. Flowers yellow, fragrant, in umbel¬ 
like cymes. Pedicels at length reflexed. Petals 4"-5" long, com¬ 
monly red at the base. Capsule 8"-15" long. 
In woods and fields. April-August. Common. 
2. Xanthoxalis corniculata (L.) Small. Yellow or Procum¬ 
bent Wood-sorrel. Stem branched at the base, the branches creep¬ 
ing, somewhat pubescent. Leaflets obcordate, wider than long. Peti¬ 
oles slender, dilated at the base. Flowers yellow, 2"-6" long, ap- 
pressed pubescent. 
Waste places. February-November. Oklahoma County. 
FAMILY 42. LINACEiE. Flax Family. 
Annual or perennial herbs, with alternate or opposite 
leaves, sessile leaves and perfect flowers. Stipules small 
or none. Sepals 5. Petals of the same nufnber as the 
sepals and alternate with them. Stamens of the same 
number, alternate with the petals. Filaments monodel- 
phous at the base. Ovary 2-5-celled, or by false septa 4- 
10-celled. 
Flowers blue; stigmas introrse, more or less elongated, 
sepals glandless. I. Linum. 
