557 
stronger at base, distinct to apex, usually giving off 1-4 branches ; 
lateral veins divergent from the base, forming regular hexagonal 
areolae, connected by short oblique veinlets, including several free 
or anastomosing veinlets ; peduncle arising from petiole at the base 
of the sterile lamina, 3-9 cm. long; spike 5-20 mm. long, apicu- 
late, sporangia 8-21 pairs, spores .027-.035 mm, trivittate, with 
irregular broken areolae, giving the surface a warty appearance ; 
striae not elevated. 
On hillsides in rather well-drained situations, Unalaska Id. 
Alaska, L. M. Turner. 1878. Distributed as O. vulgatum by 
George E. Davenport from the Massachusetts Horticultural So- 
ciety, ex herb. J. Schneck. Mr. Davenport has recently sent us 
some fine specimens showing considerable variation in size and 
shape, stating that he had long been intending to re-examine this 
species, as he felt that it was intermediate between O. vulgatum and 
O. reticulatum, and that his specimens are marked “ probably O. 
veticulatum.” They differ from O. vulgatum in the branching mid- 
vein and divergent lateral veins as well as in the larger areolae with 
more numerous included veinlets ; from O. reticulatum, which has not 
been reported north of Mexico, in the shape of the sterile frond, 
which is neither cordate nor reniform. Mr. Baker writes from Kew 
that he cannot separate the Unalaska plant in any way from O. vu/- 
gatum and that he looks on O. pedunculosum as a mere variety 
of that species. I cannot agree with him in either of these opinions. 
6. OPHIOGLOSSUM PUSILLUM Nutt. Gen. : 248. 1818. 
O. nudicaule Sturm in Mart. FI. Bras. fasc. 23. 144. In part, . 
not L. 
O. tenerum Mett. fide Prantl. l.c. 322. 4 8. fig. 23. 1884. 
Plants 2-9 cm. high; rootstock short, slightly thickened, bear- 
ing 2-7 fronds; petiole very short, 5-15 mm. long, subterranean ; 
sterile lamina small, 5-15 mm. long, 5-9 mm. broad, cuneate-lan- 
ceolate or ovate, acute or acuminate, rarely broadest at the base ; : 
basal veins 3, midvein distinct to apex, branching by lateral vein- 
lets which form narrow areolae with no free veinlets; epidermis 
wrinkled when dry, stomata numerous; peduncle arising from 
the base of the sterile lamina, 2-6 cm. long; spikes 5-10 mm. api- 
culate, sporangia 6-14 pairs; spores .030-.032 mm., 3-ridged, 
slightly and indistinctly roughened. 
Type locality in South Carolina, Nuttall; sandy hills near the 
‘Savannah River, Georgia, Beyrich; sandy pastures near Mobile. _ 
Alabama, Charles Mohr, October and November; Apalachicola _ 
