581 CHYPTOGAMIA FILICES 



467. CHEILANTHE8. Swartz. Nutt. Gen. 829. 



[Greek, Cheilos, a lip, and anthos, a (lower; from the labiate form of the Indusium. J 



Sori roundish, distinct, situated at the margin of the frond. Indusi- 

 um of distinct membranaceous indexed scales, opening inwards. 



1. C. vestita, PTilUL Frond bipinnate, hairy on both sides; pin- 

 nules pinnatiiid, the segments rounded, entire; stipe and rachis hairy. 

 Beck y Bot. p. 455. 

 Nephrodium lanosum. Jtfx* Am. 2. />. 270. 



Clothed Ciikilaxthka. 



Fronds 3 to fi inches long, and about an inch wide, lance-oblong in their outline 

 bipinnate, hirsute ; pinna about half an inch long, ovate-lanceolale in their outline, 

 subscssile, the lower ones distant, pinnate (the upper ones only pinnatifid); pin* 

 mdes oblong, obtuse, crenately pinnatifid,— the segments roundish or oval, con- 

 cave beneath, or the margins recurved ; stipe 1 to 3 inches long, terete, slender 

 but somewhat rigid, and, with the common rachis, roughish-pilose, dark brown, 

 Sori marginal, at first distinct, finally crowded, or confluent. 



Hub. Rocky banks : frequent. Fr. July. 



Obs. One other species has been found in the U. States. 



468. DICKSONIA. V Merit. Mitt* Gen. 830. 

 [In honor o(Janies Dickson; an English Botanist.] 



Sori small and roundish or dot-like, marginal, distinct Indusium 

 double ; one superficial, opening outwards, the other marginal and open* 

 ing inwards. • 



I. D. pilosiuscula, Willd. Frond bipinnate ; pinna; lanceolate, ses- 

 sile ; pinnules decurrcnt, ovate-oblong, pinnatiiid, the segments incised- 

 dentatc ; sori solitary, minute ; stipe and rachis somewhat pilose. Beck, 

 Hot. p. 456. 



Nephrodium punctilobulum. Mx. Am. 2. p. 268. 

 Aspidium punctilobulum. Torr. Comp. p. 382. 



Also- A. punctilobum. Willd. Sp. 5. p. 279. Fursh, Am. 2. p. 664. 

 .Yutt. Gen. 2. p. 250. 



Hairy Dicksonia. 



Fronds 1 to near 2 feet long, and 4 to 6 inches wide, lance-oblong in their outline, 

 acuminate, bipinnate, somewhat pilose, especially on the common rachis, and 

 midribs of the pinnae ; pinna or primary divisions mostly alternate, 3 or 4 inches 

 long, and half an inch to near an inch wide, lanceolate, acuminate, pinnate, ses- 

 sile, distinct, pale yellowish-green, numerous and rather crowded (except 2 or 3 

 of the lower pairs which are distant and nearly opposite); pinnules about half an 

 inch in length, ovate-oblong, obtuse, pinnatifid, more or less decurrentat base, the 

 .< segments with 2 to 4 teeth; stipe 4 to 8 or 10 inches long, and, with the rachis, 

 channelled above, somewhat hairy, pale green, or sometimes reddish-tawny. Sori 

 minute, one on the upper margin of each segment of the pinnules, at the lower 

 tooth, or serrature. 



I Jab. Motet shaded grounds ; along Brandy wine : frequent. Fr. 



Obs. This is a slender pretty fern, of a rather delicate texture. It is the only 

 species of the genus in the U. States ; and I confess I have not been able distinct- 

 ly to perceive, in my dried specimens, all the features of the indusium, as given 

 in the generic character. 



