182 DECANDRIA — TRIGYNMA. [Arenaria. 



12. Arenaria. Lhm. Sandwort. 

 * Stipules none. 



1. A. pephides, lj.(Sea-side Sandwort); glabrous, leaves ovate 

 acute fleshy, calyx obtuse ribless. E.Bot.t. 189. — Adenarium, 

 lid fin. 



On sandy sea-shores, frequent. Fl. July. H. — Root lona: and creep- 

 ing, slender. Sterns decumbent at the base : branches erect, leafy, up- 

 wards. Leaves large, decussate, connate, fleshy, shining, a little recurved. 

 Flowers solitary or 2 — 3 together, in the axils of the upper leaves, nearly 

 sessile, closing in the shade. Petals white, small, scarcely longer than 

 the calyx, distant, broadly ovate, shortly clawed. Surroiniding the ger^ 

 men are 10 glands, alternating with the stamens. Capsule large, round- 

 ish, 3 — 5-valved, with comparatively few, large, and black seeds. — Tlie 

 habit of this is very different from the rest of the Genus, and it is said 

 that the flowers are dioecious. It is certain that very extensive patches 

 of the jjlant have abortive flowers. 



2. A. trinervis, L. (^three-nerved Sa?idivort); leaves ovate acute 

 petiolate 3-(rarely 5-) nerved ciliated, flowers solitary, calyces 

 rough on the keel with 3 obscure ribs, JE. Bat. t. 1483. 



Shady woods and moist places. Fl. Ma3^ 0. — Slems 1 foot high, 

 much branched, pubescent. Upper /eaves sessile. Flowerstalks an inch 

 or more long, from the forkings of the extremities of the stem ; \n fruit 

 spreading, the upper part deflexed. Petals oblongo-obovate, white, 

 scarcely longer than the acute segments of the calyx. 



3. A. serpyllifolia, L. (thyme-leaved Sa?idwort); leaves ovate 

 acute subscabrous sessile, calyx hairy its outer leaves 5-ribbed. 

 E. Bot. t. 923. 



Walls and dry waste places, frequent. Fl. June. 0. — 2 — 6 inches 

 in length, erect or procumbent, much branched, pubescent. Leaves 

 small, rather rigid. Flowers white, on short stalks, from the forkings of 

 the upper part of the stem or the axils of the leaves. Petals as long as the 

 calyx. — Mr W. Wilson finds a var. at Bangor, with five stamens, and 

 the petals only \ as long as the calyx, which has prominent ribs. 



4. A. cilidta, L. (fringed Sandivori); rigid, leaves spatbulate 

 rougbish ciliated, stems much branched procumbent downy, 

 brancblets I — 2-flowered, calyx-leaves half as long as the co- 

 rolla lanceolate acute with 3 — 5 prominent ribs. E. Bot. t. 1745. 



Mountains in Ireland, rare. Limestone clift's, near Ben Bulben, a 

 mountain in Sligo ; Mr J. T. Machay. FL Aug. Sept. If.. 



5. A. Norvegica, Gunn, (Norioegian Sandu-ort) ; leaves spatb- 

 ulate flesliy glabrous as well as the much branched procumbent 

 stems, brancblets 1 — 3-flowered, calyx-leaves half as long as 

 cor. ovate acute with 3 — 5 obscure ribs. Fl. Dan. t. 1269. — 

 A. ciliata, [3. Willd. 



Unst, in the Shetland islands, first discovered by Mr Thomas Ed- 

 monstone, Jun. an enthusiastic naturalist onl^- eleven years of age, and 

 ascertained to be new to Britain, by Dr M'Nab, on his visit to 

 those islands in 1837. Fl. July. y.. — A plant with altogether the mode 

 of growth and general aspect of .4. ciliata; but the leaves are succu- 



