CEEASTIUM. — MOENCniA. 61 



** Root truly perennial, loith prostrate leafy shoots. Pet. much 

 longer than the calyx. 



6. C. arven'se (L.) ; st. ascending prostrate below, I. linear- 

 lanceolate, fl. many, sep. and iracfalanceolate slightly acute with 

 membranous margins and tips, caps, at last longer than the calyx, 

 seeds small acutely tubercled.^St. long. Fl. 7 — 14, in forked 

 panicles. Fruitstalks erect, bent just under the calyx. Stand 

 1. hairy or glabrous. — In sandy, aravelly and chalky places, rare. 



7. C. Iatif6lium (L.) ; pubescence short, st. prostrate ccespitose, 

 1. elliptic or lanceolate, fl. 1 — 3, sep. blunt with membranous 

 margins, bracts herbaceous, caps, slightly narrowing straight, 

 seeds large rugose, fruitstalks obliquely patent. — Pubescence 

 short, rigid, yellowish. Barren shoots usually long. L. vari- 

 able in shape. — ^. Edmonstonii (Wats.) ; 1. roundish-ovate dark 

 green, st. short densely leafv. — Alpine parts of Wales and 

 Scotland. /3. Unst, Shetland." P. V. E. S. 



8. C. alpinum (L.) ; hairy, st. ascending, 1. ovate ovate-ob- 

 long or lanceolate, fl. few, sep. bluntish with membranous mar- 

 gins, bracts herbaceous their margins often narrowly membra- 

 nous, caps, nearly cylindrical curved at the end, seeds sm/zU 

 acutely tuhercled, fruitstalks obliquely patent. — Pubescence long, 

 simple. St. much branched below, then simple, elongated, 

 prostrate or ascending. Fl. ■ 1, 2 or .? together, in a forked 

 panicle, shorter than their stalks. — ^Alpine parts of Scotland and 

 the North of England. P. VI.— VIIL E. S. 



9. C. trigynum (Vill.) ; st. decumbent loilh an alternate hairy 

 line, 1. eUiptic-oblong, ped. pubescent 1 — 3 flowered terminal, 

 bracts herbaceous, styles mostly 3, caps, rather longer than the 

 calyx. — Sfellaria cerastoides L. — St. 4—8 in. long, slender, leaf- 

 less and much branched below. L. light green, glabrous (or 

 hairy in C. nioale Don), subsecund and subfalcate. Fl. large, 

 white. Teeth of caps. 6 — 10.— Highland mountains. P. VIE. 

 VIIL S. I. 



16. Moen'chia Ehrh. 



1. M. erec'ta (Sm.) ; stam. 4.— It. v. 227.— Glaucous. St. 

 erect, glabrous, 1^4 in. high. L, opposite, linear-lanceolate, 

 acute, rigid. Sep. with broad white membranous margins, 

 acute. — Dry graveUy and sandy places. A. V. VI. E. I. 



