398 BENEDICT: REVISION OF THE GENUS VITTARIA 
possible according to natural relationships. V. minima, the 
simplest of the species treated, belongs at the bottom of the 
series, and is probably like the primitive form from which the 
others have been derived. The remaining six species fall naturally 
into two groups as indicated. 
In connection with the Gas eaptoks. complete citations 
of the specimens examined are given. The letters following the 
individual citations refer to the herbarium in which the specimen 
is located. ‘‘U”’ represents the Underwood Fern Herbarium of 
the New York Botanical Garden; ‘‘N’’ the National Herbarium 
at Washington; ““E” the Eaton Herbarium at Yale; ‘‘C”’ the 
Herbarium of the Botanisk Museum of Copenhagen. 
Leaves 3-6 Am. lo 1. V. minima. 
Leaves more than ‘ ts long. 
Petioles 2-angled from near te base, lamina with a ventral 
ridge along the midve 
Sporangial line 0.5-1 mm. from the margin, lamina 
inear. 
Lamina less ee Iem. broad (4-7 mm.), the areolae 
longitudin 
Lamina wie more than 1 cm. broad, the areolae 
. V. Gardneriana. 
NS 
oblique. 3. V. remota. 
Sporangial line 2-3 mm. from the margin, lamina elliptic 
to lanceolate. 4. V. latifolia. 
Petioles terete or oval in section except near the top, lamina 
vithout a ventral ridge 
mie unicostate fasch 2-3 costate), sporangia in two 
w deep grooves about 0.5 mm. from the margin. 5. V. stipitata. 
Scales always pluricostate, sporangia in a shallow groove 
rom the margin 
Lamina 4-10 mm. broad, the margins parallel, scales 
of the petiole longer and narrower than those of the 
stem. 6. V. Ruiziana. 
Lamina 8-14 mm. broad, narrowed both ways from 
the middle, scales all alike, with heavy costae. 7. V. Williamsii. 
VITTARIA MIMINA (Baker) Benedict, Bull. Torrey Club 38: 164. 
5 My 191 
Antrophyum minimum Baker, Ann. Bot. 5: 448. 1841. 
Hecistopteris minima Benedict, Bull. Torrey Club 34: 457. 19 O 
1907. 
Antrophyum Werckleanum Christ, Bull. Herb. Boiss. II. 5: II. 
1905. 
