114 CHEILANTHES. 



the two might be considered identical. But independently of the crenaled 

 margin of the segments of the frond in the present Cheilanthes, the invo- 

 lucres will afford abundant marks of distinction ; in Ch. farinosa wholly 

 membranaceous rounded and more or less combined at the base (in that 

 sense often continuous) : here the involucres are formed of the rellexed 

 margin of the frond ilself and of the same texture, altogether continuous, 

 but the edge membranaceous and merely crenated ; never toothed or cili- 

 ated. It is the regular crenation that induces me to refer this and the 

 following species to Cheilanthes, rather than to Pteris (or Allosorus), and 

 assuredly among the latter genus I know of none that assimilates with this. 



69. Ch. ochracea ; roots fibrous, stipites crowded very 

 short clothed with oblong obtuse spreading chaffy scales and 

 as well as the rachis dark ebeneous purple, fronds subniem- 

 branaceous broad-lanceolate scarcely a span long dark green 

 slightly hairy above beneath densely clothed with a golden- 

 ochraceous pulverulent substance pinnate, pinna) almost al- 

 ways opposite lanceolate obtuse lowermost subdeltoid all of 

 them pinnatifid nearly to the rachis, segments oval obtuse 

 entire or obscurely crenate ciliated, involucres continuous 

 narrow formed of the reflexed margin of the frond the edges 

 membranaceous and crenated (not ciliated). Hook. Ic. Plant. 

 t. 904, ined. Allosorus ochraceus, Hook, in Benth. Plantce 

 Hartwegiance, p. 55. 



Hab. Mexico ; moist shady places, Morelia, Ilariweg, n. 418. — In this 

 very distinct Fern the involucre is narrow, continuous, and quite pteroid, 

 but crenated, as if formed of originally distinct but confluent sori: so that, 

 as will be seen in Mr. Bentham's work above quoted, my views were not 

 quite decided whether to place it in Allosorus, Nothochhena, or Cheilan- 

 thes. I am here led to refer it to the latter genus from many points of si- 

 milarity with our last species, Ch. chrysophyllu, in the similarity of involucres 

 in the two, and especially in the presence of the golden powdery substance 

 clothing the whole under surface of the frond. In the species now before 

 us this pulverulent substance is so dense, the colour so approaching ochra- 

 ceous, that it looks as if it had been smeared with that well-known paint, 

 * yellow-ochre, of a particularly bright hue. In the shape of the frond, too, 

 lanceolate (not deltoid) this differs considerably from Ch. chrysophylla, and 

 no less in the thinner and more membranaceous texture, in the villous up- 

 per side and ciliated margins, in the very short stipites, and above all the 

 large spreading blunt chafly scales which clothe the latter. I am not aware 

 that this species has been detected by any person save Mr. Hartweg. 



Addenda, &c. 



At p. 74, n. 30, for " Hypolepis Gardnen, Hook.," read H. mnnticola, 

 and add as a synonym, " Cheilanthes monticola, Gardn. in Iluok. Ic. 

 Plant, t. 477." 



At p. 77, n. 3, under Cheilanthes farinosa, Kaulf,, insert 

 Hab. a. and /3., both found at Simla, Dr. T. Thomson. 



