CIIFvILANTHKS. 77 



each of the three primary divisions pinnatifid, at their base 

 bipinnatifid, the inargin crenated, iiivohicres incnibranaccous 

 brown conducnt transversely waved and crenated. Kze. in 

 Linna-a, 1850,/?. 24-2. Ptcris argentea, Gmel. in Nova Acta 

 Petro'p. xii. /. 12, y: 2. Swartz, Si/n. Fil. p. 105 (not Br.) 

 Langsd. et Fisch. Plaiifes ties Voy. lin.ss., Fil. p. 19, /. 22. 

 AUosorus, Presl. Cassebeera, J. Sm. Pteris pedata, var. 

 Linn. 



Hab. Siberia, Gmdin ; in the fissures of rocks, near the river Katunja 

 Altai, Ledchonr. Besides from Altai, I possess specimens of tliis rare and ele- 

 gant little Fern from KanUschatka (Herb. JJcsscr), from Uahiiria (Fischer), 

 and from Lake Baikal (Turczaninoic). — Tliis has the look of a tropical spe- 

 cies, with its white powdery siufacc beneath, and possesses a form so mrrch 

 reserablinff the West-Indian Ptcris (AUosorus) pedata, Linn., that Linnsus 

 considered it a variety of that species, and published it as such, with the 

 observation, " planta Sibirica minor et snbtus nivea, margine fcrrngineo.'' 

 It will be seen by the synonyms what conflicting opinions there are respect- 

 ing the proper genus of this plant. It ranks naturally near Ch. furinusa ; 

 but the involucres are always continuous, as in Pteris or Allosurtts, but 

 waved and crenated. 



3. Ch. farinosa, Kaulf. ; roots tufted, stipites more or less 

 elongated ebeneons glossy deciduously scaly, fronds snbcori- 

 aceous from a span to a foot long deltoidly lanceolate or lan- 

 ceolate glabrous white and powdery beneath pinnate the apex 

 pinnatifid acuminate, pinnae mostly lanceolate pinnatifid the 

 one or two lowermost pair more or less half deltoid bipinna- 

 tifid below, involucres brown scariose rounded sometimes 

 confluent and then waved and lobed, the margin entire or 

 toothed and jagged. Kaulf. Eniim. Fil. p. 212. Hook, et 

 Grev. Ic. Fit. t. 134, excl. Syn. Reliq. Htenk. (involucres 

 small entire). Pteris farinosa, Fdrsk. Fl. JEyypi. Arab. p. 187. 

 Vahl, Symh. iii. /. 75. Sicartz, Sipi. Fil. p. 105. Ch. deal- 

 bata, Don, Prodr. Fl. Nep. p. 16. WaU. Cat. n. 71, [e.vcl. sah- 

 nnm. 4). Schimp.in Herb. It. Abyss. n. 1123. Kunze, in Lin- 

 ncea, xxiv. p. 271. Pteris argyrophylla, Sw. Syn. Fil. p. 105. 

 Pt. argentea, Bory. Pt. decursiva, Fdrsk. et Sw. Cassebeera, 

 J. Sni. AUosorus, Presl. — jS. powdery substance beneath 

 nearly obsolete and usually pale sulphur colour. — y. sn)all, 

 compact rigid. Ch. rigidula. Wall. Cat. n. 2175. 



Hab. Arabia, Forskal. Abyssinia, near Ser Acaba, Schiinper. East 

 Indies, plentiful. Nepal and Simla and adjacent region, Edgeworth, Wal- 

 lich. Lady Dalhousie. Mussouree and Nynee Tab, Dr. T. Thomson. Al- 

 mora, 5,000 feet of elevation, ]\/cssr.<!. Sirac/iei/and Winterbottom. Scinde, 

 Dr. J. E. Stocks. Madras Peninsula, Dr. Wight, n. V.\7 and 1 .38. Assam 

 and Kha.sya, Griffith, T. Lobh. Neilghenies, T. Lnbb, Sir F. Adam. 

 VOL. II. M 



