IIYMENOPIIVLLUM. 87 



penus Loxsoma, that they possess the important characters of the Iructifica- 

 tion in a Fern of the more ordinary texture : and it seems to me that they 

 rank quite naturally near that fi;enus; and with respect to the frond, the 

 excellent Link justly remarks of these two {Genera, " Frons harum Filicum 

 interdum a fronde Polypodiaeearum nuUo modo differt, in generc vcro ma- 

 gis tenera est, ct ob cellulas majores magis reticulata apparet, ita ut ad 

 habitum Muscorum frondosorum magis accedant." — The genus Ilymcno- 

 phyllum is sometimes with difficulty distinguished fioni Trivliomancs. The 

 receptacle is not .always included in IJi/mcuop/ii/lliDu, nor always exsertcd 

 in Trichomancs. Again, in the latter genus, there is an a])])roacli to a two- 

 lipped involucre, and in the former it can sometimes he scarcely culled two- 

 valved. 



* Fronds undiindccl, dichotomoits, or once pinnatijid,^ glabrous. (Sp. 1 — i). 



1. H. crueiituin, Cav. ; fronds broadly lanceolate sinuato- 

 dcntate pennincrved, involucres at the apices of the teeth 

 orbicular-ovate the cuneate base sunk, the li])s free entire, 

 receptacle in age a little protrtided, stipes very long slender. 

 (Tab. XXXr. X.)—''Cav. Pncl. 1801, n. 684." Suk Si/n. Fil. 

 p. 145. Willd. Sp. Pi. v. p. 51G. 



Hah. Chiloe, on trunks of trees, Cavanilles, Cumintf, n. 5. Woods, "\'al- 

 divia. Bridges, n. 794. — Fronds brown when dry in onr specimens, not 

 blood-colored. 



2. H. marf/inaium, Hook, et Grev. ; fronds erect linear- 

 cuneate di-trichotomous, the segments linear obtuse subun- 

 dulate with a thickened margin, apex eniarginate, involucres 

 terminal solitary nearly orbicular, the valves convex free to 

 the base exserted entire with a thickened colored mjlrgin. 

 Hook, et Grev. Ic. Fil. t. 34. 



Hab. Among mosses. Port Jackson, New Holland, Eraser, Bynoe. — A 

 small and very distinct species. Fronds 1 — \\ inch long, 2 — 3 lines wide, 

 resembling some frondosc Jungermannia. Stipes 2 — 4 lines long, hairy at 

 the base, arising from a slender creeping caudex. 



3. H. asplenioidesy Sw. ; fronds pendulous oblong-lanceo- 

 late pinnatifid rather more than half-way down, the segments 

 entire or bifid oblong obtuse, involucres terminal on the seg- 

 ments orbicular-ovate entire, the short cuneate base sunk the 

 rest free 2-valved, receptacle always included. — Sic. Syn. Fit. 

 p. 145. L<im. Illustr. i. 8,/. 1. Willd. Sp. PL v. p. 510. 

 Hedw. Fil. cum Ic. — /3. fronds broader, segments subpalmate. 

 H. palmatum, Klolzuclt, in Herb, lieg . Berol.et in Herb. Hook. 



Hab. Trunks of trees, Jamaica, Sivarlz, Bancroft. — ^. Brazil, Scllow. — 

 Stipes 1 — 3 inches long: fronds nearly equal in length, sometimes simply 



^ Il.asplrnioidcs has the segments of the fronds oecasioually again divid- 

 ed. //. rarinn, Br., on the other hand, which is somelimes simply pinnat- 

 ifid, and at other times pinnate and then pinnatifid, will be found among 

 the compound species. 



