2 
CLAYTONIA 
British species of ^Claytonia 
1. # C. alsinoides (see below). Laminae of the stem-leaves suborbicular. Corolla pink or 
pale pink, at least twice as large as that of C. perfoliata. Fruit about half as long as the calyx. 
2. # C. perfoliata (see below). Laminae of the stem-leaves connate and perfoliate. Corolla 
white, small. Fruit about as long as the calyx. 
I. *CLAYTONIA ALSINOIDES. Plate i 
Claytonia alsinoides Sims in Bot. Mag. no. 1309 (1810); Baxter Brit. Bot. iv, 253 (1839) ; Limnia 
alsinoides Haworth Syn. PI. Succul. 12 (1812); C. sibirica N. E. Brown in Eng. Bot. ed. 3, suppl., 50 (1891) 
non L. 
leones '.—Bot. Mag. t. 1309; t. 2243, as C. sibirica ; Baxter op. cit. t. 253; N. E. Brown in Eng. Bot. ed. 3, 
suppl., t. 260 a, as C. sibirica. 
Camb. Brit. FI. iii. Plate /. (a) Plant in flower, (b) Petal. (c) Flower. ( d ) Pistil (enlarged), (e) Fruit 
with persistent sepals (one enlarged). (/) Fruit (enlarged). Hort., Devonshire (E. W. H.). 
Exsiccata: — Funston (Yakutat Bay, Alaska), 42, as C. sibirica. 
Annual. Shoot rather succulent, about 2 — 3 dm. high. Ground-leaves with petioles about 2 — 4 
times as long as the laminae. Stem-leaves sessile, about 3 — 4 cm. long and 2 — 3 broad. Bracts 
small, oval to linear. Flowers 1 '2 — 2’o cm. in diameter; April to July. Pedicels slender, about 
2 ’5 cm. long at maturity, about four times as long as the sepals. Sepals broadly oval, persistent, 
enlarging a little in fruit. Petals pink or pale pink, oblong, emarginate or bifid, 2 — 3 times as 
long as the sepals. Stigmas 3, nearly as long as the style. Capsule about half as long as the 
calyx. Seeds 1 — 3, dark brown, punctulate. 
The plant named C. sibirica in the Linnaean herbarium has much broader leaves than any plant we have 
seen naturalised in Great Britain, and belongs, we believe, to a different species. 
Writing of the naturalisation of the plant in a Renfrewshire station, Mr J. R. Lee (in litt .) states: — “The wood 
in which the plant grows is of the 1 mixed ’ type, with a good deal of self-sown birch [Betula] and rowan [ Pyrus 
aucuparia\ ; and so profuse is the growth of the Claytonia that it far outnumbers the other ordinary herbs of the 
plant-carpet which it appears to be ousting at this place.” 
Naturalised in woods and plantations, chiefly on siliceous soils in northern England and central Scotland ; 
Flintshire, Herefordshire, Derbyshire, Cheshire, West Riding of Yorkshire, Lancashire, Cumberland, Northumber- 
land, Ayrshire, Renfrewshire, Forfarshire, Perthshire, Orkney, and perhaps elsewhere ; no record for Ireland. 
Western North America (e.g., Oregon, Vancouver, Columbia, Alaska). 
2. ^CLAYTONIA PERFOLIATA. Plate 2 
Claytonia perfoliata [Don Hort. Cantab. 25 (1796) nomen;] Willdenow Sp. PI. i, 1186 (1798); Hussey 
in Phytol. i, ser. 2, 389 (1856); Syme Eng. Bot. ii, 137 (1864); Montia perfoliata Howell in Erythaea i, 38 (1893); 
Robinson and Fernald in Gray’s New Man. ed. 7, 388 (1908). 
leones: — Bot. Mag. t. 1336; Syme Eng. Bot. ii, t. 260. 
Camb. Brit. FI. iii. Plate 2. (a) Plant in flower. ( b ) Petals with stamens attached (enlarged). ( c ) Flower 
(enlarged), (d) Pistil (enlarged). ( e,f ) Capsules, one exploded (enlarged). Surrey (A. R.). 
Exsiccata : — Abrams, 3296, as Montia perfoliata. 
Annual. Shoot succulent about 2 — 3 dm. high. Ground-leaves forming a rosette, with petioles 
about 4 — 6 times as long as the laminae ; laminae broadly rhomboidal. Stem-leaves connate and 
perfoliate, the two about 4 cm. long and 3^5 broad. Inflorescence with 1 — 3 basal flowers, and many 
flowers above. Bracts ovate, about twice as long as the sepals. Flowers about 6 — 8 mm. in 
diameter; April to June. Petals white, oval, entire or emarginate, a little longer than the sepals. 
Stigmas 3, nearly as long as the style. Capsule subglobose about as long as the calyx. Seeds 1 — 3, 
lenticular, shining, black, punctulate. 
On the light sandy soils of the “ breck ” country in western Suffolk, this plant now is locally very abundant, 
frequently growing under the planted pine trees along the road-sides. 
Naturalised, chiefly on light sandy or gravelly soils; Cornwall, Dorset, Hampshire, Sussex, Surrey, Kent, 
Essex, Suffolk, Norfolk, Cambridgeshire, Berkshire, Oxfordshire, Herefordshire, Lancashire, and perhaps else- 
where; ? Scotland; no record for Wales or Ireland. 
Western North America (e.g., California). Naturalised in Denmark, Germany, and Belgium. 
