42 
Spring Flora of Oklahoma 
Pedicels much longer than the calyx. 
1. C. longipedunculatum. 
Pedicels sh6rter than or but little exceeding the calyx. 
2. C. brachypodum. 
1. Cerastium longipedunculatum Muhl. Nodding Chickweed. 
Annual, stem weak, reclining or ascending, diffusely branched, 6'-24' 
long, striate, finely clammy-pubescent to glabrate. Lower and basal 
leaves spatulate, obtuse, petioled, y^-V long, those of the middle 
part of the stem lanceolate or oblong. Inflorescence loosely cymose. 
Flowers 2"-3" broad. Pods nodding, 5"-9" long, curved upward, much 
exceeding the calyx. 
In moist, shaded places. April-June. 
2. Cerastium brachypodum (Engelm.) Robinson. Short-stalked 
Chickweed. Annual. Stems 3'-10' high, clammy-downy. Lower 
leaves oblanceolate or spatulate, the upper ones linear to lanceolate. 
Pedicels shorter or not much longer than the calyx. Petals longer 
than the sepals. Capsule straight or slightly curved upwards. 
In dry soil. Mareh-July. Common. 
III. SAGINA L. 
Tufted, matted, low annual or perennial herbs, with sub¬ 
ulate leaves, and small, pedicelled, whitish flowers. Sepals 
4 or 5. Petals of the same number, entire, emarginate or 
none. Stamens of the same number, or fewer, or twice as 
many. Ovary 1-celled, many ovuled. Styles as many as 
the sepals and alternate with them. Capsule 4-5-valved, the 
valves opposite the sepals. 
1. Sagina decumbens (Ell.) T. & G. Decumbent Pearlwort. 
Annual. Stems decumbent, erect or ascending, 2'-4' long, glabrous 
or minutely glandular-pubescent above. Leaves narrowly linear, 
sometimes bristle-tipped, 3"-5" long. Peduncles filiform, 3"-15" long. 
Flowers 1"-1%" broad. Sepals, petals, and styles 5. Pod ovoid- 
oblong, nearly twice as long as the calyx. Seeds with resinous glands. 
In dry soil. March-May. Common. 
IV. ARENARIA L. 
Annual or perennial, mainly tufted herbs, with sessile 
leaves, and terminal, cymose, or capitate, rarely axillary, 
and solitary, white flowers. Sepals 5, petals 5, entire or 
scarcely emarginate, rarely none. Stamens 10. Styles gen- 
