202 DECANDKIA TR1GYNIA. [CL. X. 



serrate ; petals inversely heart-shaped ; calyx ribless, much shorter 



than the petals. Stems from one to two feet high, very slender 



and decumbent at the base, square, erect, panicled at the top : 

 flowers large, pure white. Perennial : flowers in May and June : 

 grows in woods and hedges : common. Eng. Bot. vol. viii. pi. 511. 

 JEnff. Fl. vol. ii. p. 301. 673. 



4. S. graminea. Lesser Stitchwort. Leaves between linear and 

 lance-shaped, not serrate ; panicle terminal, spreading ; calyx 



three-ribbed, nearly as long as the petals. Stems very weak 



and brittle, supporting themselves by the surrounding plants, from 

 one to three feet long: flowers with white petals. Perennial: 

 flowers in May, June, and July : grows in grassy or bushy places : 

 common. Eng. Bot. vol. xii. pi. 803. Eng. Fl. vol. ii. p. 302. 674. 



5. S. glauca. Glaucotts Marsh Stitchwort. Leaves between linear 

 and lance- shaped, not serrate, glaucous ; flowers upon long solitary 



axillar stalks ; calyx three-ribbed, half as long as the petals. 



Intermediate between S. holostea and S. graminea, but easily dis- 

 tinguished from either : stem about a foot high. Perennial : grows 

 in marshy places : flowers in June and July. Eng. Bot. vol. xii. 

 pi. 825. Eng. Fl. vol. ii. p. 303. 675. 



6. S. uliginosa. Bog Stitchwort. Leaves between lance-shaped 

 and elliptical, entire, with the tip callous ; flowers irregularly pa- 

 nicled, lateral or terminal ; petals shorter than the calyx. 



Smooth, pale, and somewhat glaucous : stems weak, square, about 

 a foot high : flowers small, white. Annual : flowers in June : 

 grows in rivulets, ditches, and boggy places : common. Eng. Bot. 

 vol. xv. pi. 1074. Eng.Fl. vol. ii. p. 303. 676. 



7. S. scapigera. Many-stalked Stitchwort. Leaves between lance- 

 shaped .and linear, rough on the margin ; stem shorter than the 

 flower-stalks ; leaves of the calyx three-ribbed, as long as the pe- 

 tals. Stem erect, very short, angular: leaves crowded: flowers 



small, white. Perennial : flowers in June : said to have been 

 found on the higher mountains of Scotland, by the late Mr. Don. 

 No other botanist has found it in Britain. Eng. Bot. vol. xviii. pi. 

 1269. Eng.Fl. vol. ii. p. 304. 677. 



8. S. cerastoides. Alpine Stitchwort. Leaves between oblong and 

 elliptical, bluntish, smooth ; stems two-flowered, with a lateral 



hairy line ; flower- stalks downy ; leaves of the calyx with a single 



downy rib. Stems spreading, three or four inches long : flowers 



erect, terminal : petals nearly twice the length of the calyx, cleft 

 nearly half-way down. Perennial: flowers in June: grows on 

 Ben Nevis, Ben-na-muic-dui, Loch-na-gar, and other high moun- 

 tains in Scotland. Eng. Bot. vol. xiii. pi. 911. Eng. Fl. vol. ii. p. 

 305. 67 . 



12. ARENA'RIA. SANDWORT. 



Calyx inferior, of five oblong, pointed, permanent leaves. 

 Petals five, egg-shaped, or lance-shaped, undivided, withering. 

 Nectaries five or ten glands at the base of the stamens. Fila- 

 ments awl-shaped, five rather shorter ; anthers roundish. Ger- 

 men egg-shaped, superior. Styles three, short, spreading ; 

 stigmas downy. Capsule egg-shaped, covered by the calyx 

 and corolla, one-celled, . three-valved. Seeds numerous, kid- 

 ney-shaped.- Named from arena, sand. 232. 



