HYMENOPHYLLE^E. [ 405 ] HYMENOPHYLLEJE. 



from expansion or solution of the cellular 

 textures. 



Synopsis of the Families. 



AGARICINI. Eeceptacle like a round or 

 flat cap, oftenborne on a stalk. Hyme- 

 nium forming vertical plates or folds on the 

 under surface. 



POLYPOREI. Receptacle like a round or 

 flat cap, disk, cup, or funnel, sometimes 

 stalked, with a porous (formed of tubes) or 

 reticulated hymenium on the under side. 



HYDNEI. Receptacle like a round or 

 flat cap, cup, or funnel, sometimes stalked, 

 with the hymenium on the under side ex- 

 hibiting awl-shaped processes or tubercles. 

 AURIC UL ARES i. Receptacle tubular, 

 cup- or funnel-shaped, with the smooth or 

 papillose hymenium on the under surface. 



CLAVATI. Receptacles club - shaped, 

 simple or branched like a shrub, with the 

 hymenium covering the tips and sides oi 

 them. 



TREMELLINT. Receptacle vague, or cup- 

 shaped, often gelatinous at first, hardening 

 by drying up. Hymenium confounded 

 with the structure of the receptacle, on the 

 upper, under, or both surfaces j ba,sk" 

 terminating the branches of hyinenial fila- 

 ments, accompanied sometimes by branches 

 bearing sperm atia. The detached spores 

 often lie imbedded in the gelatinous surface 

 of the hymenium, and sometimes produce 

 spermatia there. The above characters refer 

 to the more typical species, as resupinate 

 forms or an expanded hymenophore occur 

 in each of the divisions. 



BIBL. Berkeley, Lindley's Veg. Kingdom 

 Hooker's Br. Flora, vol. ii. pt. 2 ; Ann. N. H. 

 i. 81, and ix. 1; Leveille, Ann. Sc. N. 2 se>. 

 viii. 321 ; Fries, Sum. Veg. 267 ; Tulasne, 

 Ann. Sc. N. 3 ser. xix. 193. 



HYMENOPHYL'LE^E. A family of 

 Polypodiaceous Ferns, distinguished by the 

 delicacy of the structure of their leaves and 

 the composition of the sori or fruits. The 

 leaves are of the utmost simplicity of or- 

 ganization, consisting ordinarily of a single 

 layer of cellular tissue, traversed by scala- 

 riform tubes constituting the veins. There 

 is no distinction of epidermis and paren- 

 chyma, nor are there stomata. 



Genera. 



Trichomanes. Sporanges sessile around 

 the base of an exserted filiform column, 

 formed by the prolongation of a vein be- 

 yond the margin of the leaf, surrounded by 



a cup-shaped indusium continuous with the 

 leaf (fig. 339). 



Hymenophyllum. Sporanges sessile up 

 to the summit of a similarly formed column 

 projecting from the margin of the leaf, sub- 

 elevated, but not exserted beyond the indu- 

 sium, which is two-valved (fig. 340). 



Fig. 339. 



Fig. 340. 



Trichomanes humile. Hymenophyllum bivalve 



Fig. 339. Fragment of a leaf, with sori. 

 Fig. 340. Ditto. 



Magnified 10 diameters. 



Loxosoma. Sporanges stalked, inserted 

 up to the summit of a subelevated exserted 

 column arising in a similar way within the 

 margin of the leaf, surrounded by an indu- 

 sium, somewhat within the margins of the 



Fig. 341. 



Fig. 342. 



Fig. 343. 



Hymenophyllum ciliatum. 



Fig. 341. Fragment of a leaf. Magn. 10 diams, 

 Fig. 342. Sorus with one valve removed Mang. 40 



diains. 

 Fig. 343. Sorus. Magn. 20 diams. 



