38 MR. F. N. WILLIAMS ON THE GENUS SILENE. 
Subgenus I. GASTROSILENE. 
Calyx 10-vel 20-nervius, nervis reticulato-venosis, vesicarie 
inflatus et post anthesin semper ampliatus, fructifer a capsula 
remotus. Species perennes. 
I. Petala, unguibus superne dilatatis vel auriculatis, bifida 
rarius emarginata vel subintegra. 
A. Calyx 10-nervius. 
a. Folia subulata pungentia. 
1. Sivene poncEns, Boiss., Diagn. Pl. Nov. Or., Ser. 1. i. p. 32 5 
Rohrb., Monogr., p. 77. 
Hab. Turkish Armenia; Mt. Olympus, and Mt. Tech-Dagh, 
near Erzeroum; also near Erzinghan, westward of Erzeroum 
(Sintenis, It. Orientale, 1889). 
b. Folia mutica. 
a, Caules florigeri e basi rosule foliorum terminalis lateraliter 
edentes. 
2. S. oponropetaLa, Fenzl, Pugill. Pl., p. 9, n. 28 (1842); 
Rohrb., Monogr., p. 78. 
a, GENUINA, Rohrb., l.c. 
Caules humiles, interdum foliorum rosulam vix excedentes, 
cum calyce glanduloso-pubescentes. Folia lanceolata vel lineari- 
lanceolata acuminata scabrida vel glandulosa. Flores pauci 
interdum solitarii. 
B. CERASTIIFOLIA, Boiss., Fl. Orient., i. p. 626. 
y. LATIFOLIA, Botss., lc. 
Syn. S. physocalyx, Ledeb., Fl. Ross., i. p. 321. 
S. odontopetala var. physocalyx, Rohkrb. 
6. CONGESTA, Boiss., l.c. 
Syn. 8. Sinaica, Boiss., Diagn. Pl. Nov. Or., Ser. I. i. p. 25. 
S. odontopetala var. sinaica, Rohrb. 
S. Raddeana, Trautv. in Act. Hort. Petrop., ii. (1873) 
p. 472. 
Geogr. limits—N. The Western Caucasus (var. +). 
S. St. Catherine’s Peak, on Mt. Sinai (var. 6). 
EE. Mt. Elburz, in N. Persia (var. +). 
W. Mt. Ak-Dagh, in Anatolia (var. B). 
