178 The Ohio Naturalist. [Vol. XIII, No. 8, 



Moehringia L. 



Low perennial herbs. Leaves oblong, ovate-lanceolate or 

 linear, sessile or with short petioles; flowers white, solitary or in 

 cymes; sepals and petals 4 or 5, stamens 8 or 10. 



L Moehringia lateriflora (L.) Fenzl. Blunt-leaf Moehrin- 

 gia. Stems finely pubescent, 6 to 14 inches high; leaves thin, 

 oval or oblong, obtuse, the margins and nerves ciliate; flowers 

 arranged in cymes or solitary; petals twice as long as the sepals. 

 Ottawa, Auglaize, Darke, Morrow, Franklin, Perry. 



Holosteum. 



Annual or biennial, erect herbs with acute, ovate-lanceolate 

 leaves. Flowers white, arranged in long terminal peduncles in 

 umbellate cymes; petals 5, sepals 5, stamens 3 to 5, rarely 10. 



1. Holosteum umbellatum L. Jagged Chickweed. Gla- 

 brous or somewhat glandular, 3 to 7 inches high, pubescent above 

 and a little hairy below. Basal leaves spreading, oblanceolate or 

 oblong; stem leaves oblong, sessile; flowers arranged 3 to 8 in an 

 umbel; pedicels erect in flower, reflexed in fruit; sepals obtuse, 

 shorter than the petals. Hamilton County. 



Alsine L. 



Tufted herbs with white flowers arranged in cymes. Sepals 

 5 rarely 4; petals of the same number, 2 cleft, 2 parted, or emar- 

 ginate, rarely none; stamens 10 or fewer; styles usually 3, rarely 

 4 or 5, generally opposite the sepals. 



1. Styles 5; leaves ovate, pointed. A. aqiiatica. 



1. Styles 3, rarely 4. 2. 



2. Leaves linear or lanceolate, not pubescent. 3. 



2. Leaves ovate-pubescent. 4. 



3. Leaves acute at each end; seeds smooth. A. longifolia. 



3, Leaves broadest near the base; seeds rough. A. graminea. 



4. Petals shorter than the calyx; lower leaves petioled. A. media. 



4. Petals longer than the calyx; lower leaves rarely petioled. A. piibera. 



1. Alsine aquatica (L.) Britt. Water Chickweed. Perennial, 

 usually glandular-pubescent above, ascending or decimibent, 

 about 13 inches high. Leaves ovate or ovate-lanceolate, acute; 

 the upper ones sessile, the lower petioled, rounded at the base, 

 ^ to lyz inches long; flowers solitary, in the forks of the stem, or 

 in C}nries; pedicels longer than the calyx in fruit, deflexcd; calyx 

 campanulate, sepals about half as long as the 2-cleft petals; 

 stamens 10. Guernsey County, 



2. Alsine media L. Common Chickweed. Annual; tufted 

 and much branched, decumbent or ascending; 4 to 14 inches 

 high; glabrous, except the line of hairs along the stem and branches, 

 the pubescent sepals and ciliate petioles; leaves oval or ovate, 

 usually acute; flowers in terminal, leafy cymes or solitary in the 

 axils. General. 



