50 
CERASTIUM 
(ft) var. hirsutum forma nemorale Druce in Moss Camb. Brit. FI. iii, 50 ; C. triviale var. nemorale 
Uechtritz in Oesterr. Bot. Zeit. xviii, 73 (1868); Rouy et Foucaud FI. France iii, 207 (1896); non C. nemorale 
Bieberstein. 
4 
Shoot robust, 30 — 50 cm. Leaves larger, more or less hairy, sometimes with glandular hairs. 
Peduncles , pedicels , and calices usually with glandular hairs. Capsule rather longer than the calyx. 
A plant collected by Sir J. D. Hooker in 1904 at “the Camp, Sunningdale, not on made ground, which was 2 feet 6 inches 
[75 cm.] high,” in Herb. Kew, should be placed here. 
The var. elongatum Grenier Monogr. Cerast. 39 (1841) appears to differ chiefly in its larger petals. 
Fen banks, alluvial meadows, damp sandy-peaty soils; locally common. 
Europe. 
(7) var. hirsutum forma glandulosum Druce in Moss Camb. Brit. FI. iii, 50 ; C. viscosum var. glandulosum 
Boenninghausen Prodr. FI. Monast. 13 (1824); C. triviale var. glandulosum Reichenbach FI. Germ. Excurs. 796 
(1833); C. vulgatum var. glandulosum Grenier Monogr. Cerast. 39 (1841); C. vulgare subsp. triviale forma 
glandulosum Murbeck in Bot. Notiser 253 (1898). 
Exsiccata : — von Hayek (FI. Stir.), 333, as C. caespitosum var. glandulosum ; Druce herb, x, 63. 
Shoot 1 — 3 dm. Leaves oblong. Bi'acts with a narrow, scarious margin. Peduncles , pedicels , 
and sepals with gland-tipped hairs. Petals 5'o — 6*5 mm. Seeds cr6 mm. 
A smaller, more slender, and less diffuse plant than forma nemorale. Possibly a hybrid of C. viscosum and C. vulgatum. 
On the Coralline Oolite, Headington and near Wheatley in Oxfordshire. 
Austria. 
(8) var. hirsutum forma obtusum Druce in Moss Camb. Brit. FI. iii, 50 ; C. vidgatum var. obtusum Druce 
in Bot. Exch. Club Brit. Is. Rep. for 190J, 256 (1908). 
Shoot rigid, tall, 30 — 35 cm. Inflorescence dense. Sepals very short, obtuse. Capsule short, 
6 mm. Seeds light brown, o '6 mm. 
St Aubyn’s, Jersey, in dry places, growing with the typical form of var. hirsutum. Not known elsewhere. 
C. vulgatum occurs in pastures and meadows, by tidal streams, on sea-shingle and sand-dunes, 
on grassy chalk downs, on maritime and mountain cliffs and talus, on walls, among mine refuse, in 
arable and fallow fields, by waysides and in waste places, preferring well-drained soils ; a ubiquitous 
species common throughout the British Islands, ascending to nearly 1200 m. in Scotland and over 
1000 m. in Ireland. 
Faeroes, Iceland, Scandinavia, Denmark, Germany, Holland, Belgium, France, central Europe 
(ascending to 2550m. in Switzerland), Russia, southern Europe; Asia; Africa; America (not in- 
digenous). 
C. alpinum x vulgatum (p. 47) ; C. arcticum x vulgatum (p. 48). 
Series ii. Viscosa 
Viscosa Moss Camb. Brit. FI. iii, 50; Fugacia Fenzl in Ledebour FI. Ross, i, 403 (1842); Annuae 
Schultz in Arch. FI. i, 24 (1842). 
For characters, see page 44. 
British species of Viscosa 
5. C. viscosum (p. 51). Inflorescence more or less densely crowded. Bracts all herbaceous. 
Pedicels erect, shorter than the calyx. Flowers usually pentamerous. Petals a little longer than the 
sepals, narrow, hairy at the base. Stamens 10. 
6. C. tetrandrum (p. 52). Inflorescence rather lax. Bracts all herbaceous. Pedicels usually 
erect, longer than the calyx. Flowers pentamerous or (usually) tetramerous. Petals rather narrow, 
about as long as the sepals, glabrous. Stamens 5 or (usually) 4. 
7. C. pumilum (p. 53). Inflorescence rather lax. Upper bracts with narrow, scarious margins. 
Pedicel about as long as the calyx, reflexed between flowering and fruiting. Petals rather deeply 
notched, glabrous. Stamens 5. 
8. C. semidecandrum (p. 54). Inflorescence rather lax. Upper bracts with broad scarious 
margins. Pedicels 1*5 — 4 times as long as the calyx, reflexed between flowering and fruiting. 
Petals narrower and less deeply notched than in C. pumilum, glabrous. Stamens usually 5. 
