i8o The Ohio Naturalist [Vol. XIII, No. 8, 



5. Cerastium arvense webbii Jennings. Plant more or less 

 viscid-pubescent, 12 to IS inches high. Lower leaves oblong- 

 lanceolate, upper ones ovate-lanceolate, 13'4 to 2 inches long; 

 flowers arranged in strict c^-mes. Cuyahoga. 



Spergula L. 



Annual herbs. Leaves sul^ulate, stipulate, arranged in 

 fascicles in the axils; flowers white, in terminal cymes; sepals 

 5; petals 5; stamens 10 or 5; styles 5, alternate with the sepals. 



1. Spergula arvensis L. Corn Spurry. Glabrous or finely 

 pubescent, 9 or 10 inches high. Lea\'es linear or subulate; 

 stipules small, connate; pedicels slender, divaricate. Lake County. 



Tissa Adans. 



Low herbs with fleshy, linear, or setaceous leaves; often ar- 

 ranged in fascicles in the axils; stipules scarious; flowers pink or 

 white in terminal cymes; sepals 5, petals 5, rarely fewer or none, 

 entire, stamens 2 to 10. 



1. Tissa rubra (L) Britt. Sand-spurry. Annual or perennial, 

 depressed or ascending, leafy, glabrous or glandular-pubescent 

 above; 5 to 7)4 inches high; leaves linear, X inch long; flowers 

 bright pink; stipules ovate-lanceolate, acuminate; sepals ovate- 

 lanceolate, somewhat acute. Lake County. 



Agrostemma L. 



Annual or biennial, pubescent or wooly herbs. Lea^'es oppo- 

 site, linear or linear-lanceolate, acute or acuminate, sessile ;flowers 

 red or white, solitary; petals 5, shorter than the sepals, unap- 

 pendaged, emarginate; calyx oblong, wooly, 10-ribbed; sepals 5, 

 linear, elongated and foliaceous, stamens 10, styles 5, opposite the 

 petals. 



1. Agrostemma githago L. Corn Cockle. Plant erect, 12 to 

 40 inches high, covered with long, whitish, appressed hairs; leaves 

 linear-lanceolate; calyx ovoid, sepals exceeding the i:)etals and 

 deciduous in fruit; flowers red, petals slightly emarginate, obovate- 

 cuneate. General. 



Lychnis L. 



Mostly mere or less pubescent herbs. Sepals 5, petals 5, entire, 

 2-clcft or laciniatc, generally crowned; stamens 10; st\'les 5, rarel>' 

 4; calyx ovoid, tubular or inflated, 10-nerved. 



1. Plant entirely pubescent, viscid. 2. 



1. Plant having viscid-pubescent bands on the stems. L. viscaria. 



2. Calyx-teeth twisted; plant densely white-wooly. L. coronaria. 



2. Calyx teeth not twisted; only ordinarily jmbescent; u.sually diecious. 3. 

 .3. Flowers white or pink; calyx teeth attenuate. L. alba. 



3. Flowers red; calyx teeth triangular-lanceolate, acute. L. dioica. 



