MAXON—STUDIES OF TROPICAL AMERICAN FERNS. 161 
Plants wholly unarmed. 
Ultimate (terminal) divisions almost capillary, divari- 
cate, 0.3 to 0.5 mm. broad (not broader than the 
narrowly foliaceo-marginate cost), linear, or 
slightly clavate at the monosorous apices ........ 9. O. schlechtendahlit. 
Ultimate (terminal) lobes broader, shorter, foliaceous, 
0.6 to 1.0 mm. broad, not distinct, cuneately 
joined in pairs, these again acutely joined, the 
segments thus in general 2 to 4 times flabellately 
parted or cleft, invariably cupeate............... 10. O. guatemalensis. 
1. Odontosoria uncinella (Kunze) Fée, Gen. Fil. 326. 1852. 
Davallia uncinella Kunze, Bot. Zeit. 8: 213. 1850. 
Microlepia uncinella Mett. Fil. Hort. Lips. 103. 1856. 
Lindsaya uncinella Krug, Bot. Jahrb. Engler 24: 92. 1897. 
TYPE LOCALITY: Province of Santiago [Oriente], Cuba, altitude 1,200 meters (Linden). 
DistrisuTion: Cuba and Porto Rico, ascending to 1,200 meters. 
InLustRATIONS: Fée, loc. cit. pl. 27 B. f.1; Kunze, Farrnkr. 2: pl. 140 (as Davallia 
uncinella). 
Specimens of the type collection of this species have not been seen by the writer. 
The description and figures cited above serve to distinguish it very well, however, 
and there isample material also from the type region of eastern Cuba. The leaf tissue 
is thick and rigidly herbaceous, and in other respects the plant shows its affinity to the 
Jamaican species here called Odontosoria jenmanii, which in error has gone latterly 
under the name 0. aculeata. 
The following specimens are in the U. 8, National Herbarium: 
Cusa: Without definite locality, Wright 899. Upper slopes and summit of Gran 
Piedra, alt. 900 to 1,200 meters, climbing on tree trunks and on banks, April 
14, 1907, Maxon 4046. Damp thickets, Rio Guayabo, above the Falls, Oriente, 
alt. 450 to 550 meters, Shafer 3629. Bushes along trail, Rio Yamaniguey to 
Camp Toa, Oriente, alt. 400 meters, Shafer 4012. Camp La Gloria, south of 
Sierra Moa, Oriente, Shafer 8155. 
Porto Rico: Mount Viva Christo, between Adjuntas and Guayanilla, at border 
of forest, Sintenis 4600. Mount Morales, near Utuado, in primeval forest, 
Britton & Marble 1457. 
2. Odontosoria aculeata (L.) J. Smith, Cult. Ferns 67. 1857. 
Adiantum aculeatum L. Sp. Pl. 1096. 1753, in greater part. 
Davallia aculeata J. E. Smith, Mém. Acad. Sci. Turin 5: 415. 1793, in part. 
Davallia dumosa Swartz, Syn. Fil. 135, 353. 1806. 
Stenoloma dumosum Fée, Gen. Fil. 330, 1852, as to name only. 
Stenoloma aculeatum Fée, Gen. Fil. 330. 1852, excluding reference to Sloane’s plate. 
Microlepia aculeata Mett. Fil. Hort. Lips. 103. 1856, as to description, in part, and 
excluding reference to Hook. pl. 54. B. 
Lindsaya aculeata Mett. Ann. Sci. Nat. IV. Bot. 15: 65. 1861. 
Lindsayopsis aculeata Kuhn, Gruppe Chaetop. 27. 1882. 
TYPE Locauity: ‘‘Spiny bottom,’’ near Leogane, Haiti (Plumier). 
DistRiBuTION: Santo Domingo, eastern Cuba, and Porto Rico, extending to 1,190 
meters altitude. 
ILLUSTRATIONS: Plum. Trait. Foug. pl. 94; Spreng. Anleit. Gewiichs. 3: pl. 5. f. 37 
_ (as Adiantum aculeatum); Fée,' loc. cit. pl. 27 bis. A. f. 4? (as Stenoloma aculeatum). 
1 Fée’s illustration (pl. 27 bis. A. f. 4), cited above, may not represent true 0. 
aculeata. It is characteristic of that species in everything save spines, and these are 
perhaps not drawn correctly. Usually the spines are straight and acicular, but in 
congested specimens they are likely to be shorter and stouter, or even a little 
curved. Not infrequently straight spines become somewhat curved from the plant’s 
being dried under pressure. The spines shown in this figure are similar to those of 
O. jenmani, but the leaf segments are very different from those of that species. 
