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MR. F. N. WILLIAMS ON THE GENUS SILENE. 101 
170. Sirenr tazica, Boiss., Diagn. Pl. Nov. Or., Ser. I. i. 
p. 35; Rohrb., Monogr., p- 142. 
Hab. Turkish Armenia. 
Rohrbach’s next series, viz., Polyschemone, includes only one species, 
S. nivalis. As has been pointed out in the Introduction to this revision, 
T have considered it to be better to exclude from the genus those species 
which have 5 styles, in which, of course, the capsule is 5-septate at the 
base, and to distribute them if possible among allied genera. Some 
botanists, especially those with analytical bias, would prefer to maintain 
Schott’s original genus, and to consider Polyschemone nivalis as the type of 
the genus, of which Schott gives a very complete description in Analecta 
botanica, i, p. 56 (1854). The plant was first described as a Lychnis by 
Kitaibel in 1814, and in the most recent floras is included in Melandryum. 
Series 3. Nanosilene. 
Species nang uniflore : calyx campanulatus. 
171. S. acautts, Linn., Sp. Plant., ed. II. (1762) p. 603; Sp. 
Plant., ed. I. p. 415 (Cucubalus) ; Reichb., Ic. Fl. Germ. Helv., 
n. 5084; Rohrb., Monogr., p. 148. 
a. GENUINA, 
Calyx umbilicatus. Petala profunde emarginata. Capsula 
oblongo-cylindrica e calyce lonye exserta. Semina parva. 
Adde syn. S. alpina, S. F. Gray, Nat. Arr. Brit. Pl., ii. p. 643. 
Forma suBACAULESCENS, mihi :—subacaulescens, foliis anguste 
linearibus 25-35 mm. 
Hab. United States; Rocky Mts. of Colorado, and in 
Arizona. 
B. BryorpEs, Jord. (sp.), Pugill., Pl. Nov. in Mém. Acad. Nat. 
Lyon, 1851, p. 241; Obs. Pl. France, v. p. 35, t.1; Willk., Ic. 
Descr. Pl. Nov. Hisp., p. 70, t. 51 a. 
Calyx haud umbilicatus, sed in pedunculum angustatus. 
Petala emarginata. Capsula e calyce brevius exserta. Semina 
majora. 
Syn. S. acaulis, Willk. in Flora, xxxiv. (1851) p. 601. 
Hab. Alps of Dauphiny and Savoy ; Spanish Pyrenees, Mt. 
Izas, Mt. Soba, and the Baths of Panticosa, in prov. of Aragon 
(ex Willk. et Lange, Prodr. Fl. Hisp., iti.) ; Switzerland, Plans de 
Taman in canton of Vaud, and Albula Pass in canton of Grisons 
(ew Nym., Consp. Fl. Eur., suppl.)- 
y- Exscara, All. (sp.), Fl. Pedem., ii. p. 83, t. 79 (1785); Jord., 
Obs. Pl. France, v. p. 39, t. 1. 
