BeENEDIcT: -ANTROPHYUM 449 
Reasons of value equal to those just given for recognizing 
A, discoideum can be given for the admission of the other species 
treated here. Indeed, further field work may show that two or 
three other variant forms to which reference is made under the 
Species concerned, are also entitled to specific rank. 
The American species may be separated as follows : 
Spores diplanate ; paraphyses pyriform ( Sco/iosorus). 1. A. enstforme, 
Spores triplanate; paraphyses wanting. 
Sporangia in long simple grooves parallel to costa ( Polytaenium). 
2. A. lineatum. 
Sporangia not in long simple grooves (Euantrophyum). 
Areolar axes longitudinal. 3. A. lanceolaium. 
Areolar axes divergent. 
Soral lines slightly sunken; marginal venation mostly closed in short 
areolae with few free veinlets. 
Fronds coriaceous, margins reflexed, 
Fronds oblanceolate, rather thick, opaque. 
4. A. brastlianum, 
Fronds elliptic, thin, translucent. . A. cayennense 
Fronds not coriaceous, margins flat; fronds oblong, long-acute. 
6. A. Dussianum. 
Soral lines superficial ; marginal venation of open free veinlets, 
ronds broadly oblanceolate, short-stiped, thick. 
7. A. Jenmani. 
Fronds elliptic-lanceolate, sessile. 8. A. anetiordes. 
Fronds oblong or oblanceolate, subsessile, thin. 
9. A, discoideum. 
I. ANTROPHYUM ENSIFORME Hook.; Benth. Pl. Hartweg. 73. 
1841. (Type from Mt. Totontepeque, Mexico.) 
Antrophyum falcatum Mart. & Gal. Mém. Foug. Mex. 49. p/. 72. 
18 
42. 
Antrophyum carnosum Liebm. Vid. Selsk. Skr. V.1: 161. 1849. 
Antrophyum Galeotti Fée, Mém. Foug. 4: 51. pl. 5.f- 4. 1852. 
Scoliosorus ensiformis Moore, Ind. Fil. xxix. 1857. 
Dictyogramme ensiformis Trev. Atti Ist. Ven. V. 3: 592. 1877. 
Spores diplanate, paraphyses pyriform, brown or yellow, on 
slender pedicels of various lengths which may arise singly or in 
clusters from a thickened basal cell ; sporangia in simple or usually 
only once-forked, oblique, free, superficial lines along each side of 
the frond; fronds narrowly oblong, often curved, tapering very 
gradually below to a sessile base, less gradually above to a narrowly 
acute apex, thin, rather flaccid, 17 x I.I-50 X 2.7 cm. margins 
reflexed, slightly repand; areolae in branching rows divergent 
