Part 1, 1909] SCHIZAEACEAE 35 
long, 10-18 cm. broad, once-pinnate, acuminate, the rachis subflexuous, slightly or densely 
pubescent, foliaceo-marginate toward the apex; tertiary segments 5-8 pairs, approximate 
or apart, the upper ones gradually smaller, all but the uppermost petiolate, elongate deltoid- 
ovate or deltoid-lanceolate from a cordate base, the larger ones 3-9 cm. long, the costa not 
nodose-articulate at the base, emitting alternately upon each side a dichotomous branch, the 
segment thus subpalmately 5-lobed or by the further division of the branches rarely 7-9-lobed, 
the middle lobe invariably the longest, lanceolate to linear-oblong, 5-15 mm. broad, 
acutish or obtuse, crenate or closely and obtusely lobed, the margins bluntly or sharply 
denticulate ; costae elevated, stoutish, usually flexuous, excurrent to the apex, pilose or 
often sparsely so below; costulae and veins alternate, the latter very oblique, repeatedly 
dichotomous or subpinnately branched, the branches close, sparingly pilose or often con- 
spicuously so with numerous short hairs intermixed; leaf-tissue membrano-herbaceous, 
lustrous at least above, glabrate or minutely pilose. Fertile secondary (geminate) pinnae 
mostly equaling the sterile, bipinnate at the base or often so nearly throughout, the lower 
and middle tertiary segments oblong to narrowly deltoid, with 1-6 pairs of mainly alternate 
quaternary segments, the lowest of these inequilateral, often subpalmately lobed; spo- 
rangiophores solitary, serrate, up to 8 mm. long; spores minutely verrucose. 
TYPE LOCALITY: Mexico. 
DISTRIBUTION: Mexico and Central America generally, southward to Brazil. 
ILLustratTions: Ettingsh. Farnkr. fi. 170, f.7,8; pl. 174, f. 1, 11. 
8. Lygodium cubense H.B.K. Nov. Gen. & Sp. 1: 31. 1815. 
Lygodium Poeppigianum Presl, Abh. BGhm. Ges. Wiss. V. 4: 363. 1845. 
Rhizome creeping, slender, blackish, clothed with short dark-brown hairs; stipe 2mm. 
in diameter, subterete, narrowly marginate, light-brownish or dull-stramineous from a 
darker hispid base ; primary branches evident only as short protuberances upon the primary 
rachis, the terminal bud low-rotund, clothed with cinnamomeous hairs, usually dormant ; 
sterile secondary (geminate) pinnae petiolate, in small forms linear with a single segment 
or binate, but usually rhombic-ovate and pinnate or subbipinnate, 10-20 cm. long and broad, 
the rachis strongly divaricate-flexuous, marginate, coarsely pubescent ; tertiary segments 1 
or 2 pairs, the upper ones linear to linear-lanceolate, petiolate or subsessile from a strongly 
inequilateral base, the lower side cordate, the upper cuneate, the terminal segment similar 
or joined to the next below, all acute or acutish, 3-13 cm. long, 3-13 mm. broad, the basal 
segments binate or pinnate with a single pair of quaternary segments, all similar to the 
upper tertiary segments ; costae nodose-articulate, pubescent above, sparingly pilose below, 
strongly elevated, stout, extending to the apex; veins very oblique, curved, 1-4 times 
dichotomous, elevated, bearing a few scattering hairs above ; leaf-tissue rigidly coriaceous, 
striate, above light- or yellowish-green, lustrous, below paler and less lustrous, whitish- 
glandular below (often conspicuously so), the margins a little thickened, obscurely crenate- 
serrulate. Fertile secondary (geminate) pinnae bipinnate or at the base subtripinnate ; 
tertiary segments 3-4 pairs, mostly shorter than the sterile, the upper ones cuneate, del- 
toid-lanceolate, the middle pinnate at the base with small obdeltoid or subrhombic quarter- 
nary segments, the lowermost bipinnate at the base, the quarternary segments similar to 
the anterior tertiary segments; sporangiophores distant, single upon the oblique crena- 
tions, serrate, mostly 3-8 mm. long, pilose on the midvein above and at the base below, 
also upon the indusia; spores coarsely low verrucose-tuberculate. 
TYPE LOCALITY: Near Havana, Cuba. 
DISTRIBUTION : Known only from Cuba, ao common. 
ILLUSTRATION: Ettingsh. Farnkr. fl. 169, f. 2 
9. Lygodium oligostachyum (Willd.) Desv. Mém. Soc. Linn. 
Paris 6: 205. 1827. 
Hydroglossum oligostachyum Willd. Sp. Pl. 5: 81. 1810. 
Lygodium gracile Baker, Jour. Bot. 26: 35. 1888. 
Fronds apparently about 2 meters long; rhizome short-creeping, blackish; stipe dull- 
brownish from a darker base, about 1 mm. in diameter, the rachis similar, subterete, very 
