June, 1913 .] 
Caryophyllaceae of Ohio. 
177 
12. Petals unappendaged; styles opposite, alternate with the leaf-like 
calyx-teeth. Agrostemma. 
12. Petals often appendaged; styles alternate with them; calyx-teeth 
short. Lychnis. 
13. Petals appendaged at the base of the blade, calyx terete. Saponaria. 
13. Petals not appendaged, calyx 5-angled, enlarged in fruit. Vaccaria. 
Sagina L. 
Low, tufted, matted herbs with subulate leaves. Flowers 
white; petals 4 or 5, entire, emarginate, or none; sepals 4 or 5; 
stamens 4 or 5 or 8 or 10; styles of the same number, arranged 
alternately. 
1. Plant depressed-spreading; petals present. 5. procumbens. 
1. Plant erect; petals minute or none. 5. apetala. 
1. Sagina procumbens L. Procumbent Pearl wort. Annual 
or perennial; branching, decumbent or spreading; smooth or some¬ 
what downy-matted, to inches high; leaves linear, subulate, 
connate at the base; flowers arranged on capillary peduncles 
which are often reflexed in fruit; sepals and stamens 4 or rarely 
5; petals sometimes absent. Lake, Gallia. 
2. Sagina apetala Ard. Small-flowered Pearlwort. Erect 
or ascending, annual, glabrous, filiform, about SjA inches high; 
leaves linear-subulate, smooth or slightly ciliate, J4 inch long; 
flowers on long peduncles; petals none or four very minute ones; 
sepals 4, ovate or oval, obtuse. Lawrence County. 
Arenaria L. 
Tufted herbs with sessile leaves. Flowers white, in cymes, 
heads, or rarely solitary; petals 5; sepals 5; stamens 10; styles 
generally 3. 
1. Plant pubescent, leaves ovate-acute, cymes leafy. A. serpyllifolia. 
1. Plant glabrous, leaves subulate. 2. 
2. Perennial; leaves in groups at the nodes or axils, rigid. A. michauxii. 
2. Annual; leaves opposite, soft. A. patnla. 
1. Arenaria serpyllifolia L. Thyme-leaf Sandwort. An¬ 
nual, somewhat pubescent, branched, 5p2 to 14 inches high; 
leaves ovate, acute; flowers numerous, arranged in cymose panicles; 
sepals ovate, acute; petals obovate or oblong, usually shorter. 
General in Ohio. 
2. Arenaria michauxii (Fenzl.) Hook. Rock Sandwort. 
Perennial, tufted, glabrous, dark green, 7 to 15 inches high; leaves 
subulate or filiform, 1-ribbed arranged in fascicles in the axils, 
34' inch long; calyx ovoid-oblong in fruit; sepals lanceolate or 
ovate-lanceolate, acute, one half the length of the petals. Ottawa, 
Erie, Cuyahoga, Clarke, Franklin. 
3. Arenaria patula Mx. Pitcher’s Sandwort. Annual, glab¬ 
rous, very slender, 8 to 10 inches high; leaves soft, linear-filiform, 
to 1 inch long; flowers in cymes, sepals lanceolate, acuminate, 
about one-half the length of the emarginate petals. Montgomery 
County. 
