Part 1, 1909] SCHIZAEACEAE 33 
3. Lygodium volubile Sw. Jour. Bot. Schrad. 18017: 304. 1803. 
Lydroglossum volubile Willd. Sp. Pl. 5: 78. 1810. 
Lygodium Wrightit D.C, Eaton; Prantl, Schiz. 78. 1881. 
Fronds climbing 4-10 meters; rhizome short-creeping, corrugate, dark-brown, densely 
clothed with slender blackish hairs; stipe and rachis wp to 3 mm. in diameter, yellowish 
to brownish-castaneous, subterete, narrowly marginate, puberulous, glabrescent; primary 
branches evident as short tubercles upon the rachis, the terminal bud inconspicuous ; sterile 
secondary (geminate) pinnae petiolate (1.5-3 cm. ), orbicular to broadly oblong-ovate, acute, 
10-20 cm. long, 8-20 cm. broad, pinnate, the rachis relatively slender, subdivaricate-flexu- 
ous, stramineous to brownish, narrowly marginate, short-pubescent (especially above), 
glabrescent ; tertiary segments 2-4 pairs, subequal, distant, petiolate (5-10 mm. ), oblong- 
lanceolate from a broadly cuneate or rounded subtruncate (or, rarely, sharply auriculate- 
hastate) base, 4-15 cm. long, 1-2.5 cm. broad, the apex acute, acuminate, or rarely attenu- 
ate, the costae nodose-articulate, flexuous, elevated, stoutish, extending to the apex, bear- 
ing a few antrorse hairs ; terminal segment conform, rarely confluent with the next below ; 
veins oblique, curved, elevated, mostly 1-2 times dichotomous, glabrous; leaf-tissue cori- 
aceo-herbaceous, bright-green, lustrous upon both surfaces, paler below, glabrous or ob- 
scurely short-pilose, the margins cartilaginous, lightly crenulate-serrate, the serrations dis- 
tant. Fertile secondary (geminate) pinnae similar to the sterile in shape, pinnate or com- 
monly bipinnate, the lower tertiary segments then deltoid, the quaternary segments 
1-jugate or rarely subbijugate, opposite, short, spreading; sporangiophores numerous, ter- 
minating the stronger branch of the mostly 1-2-forked veins, up to 1 cm. long, serrate, 
glabrous above, sparsely short-pilose below; spores minutely punctate, obscurely subcris- 
tate-tuberculate. 
TYPE LOCALITY: Jamaica. 
DISTRIBUTION: Jamaica and Cuba; also from northern South America to Brazil. 
ILLUSTRATION: Sloane, Hist. Jam. p/. 46, f. 1. 
4. Lygodium micans Sturm, in Mart. Fl. Bras. 17: 178. 1859. 
Osmunda scandens Aubl. Pl. Guian. 2: 961. 1775. 
Lygodium scandens Schkuhr, Krypt. Gew. 1: 138, excl. syn. 1809. Not Z. scandens Sw. 1801. 
Fronds very ample, apparently high-climbing; primary rachis stout, subterete, very 
narrowly marginate, dull-stramineous to light-brown ; primary branches evident only as 
stout protuberances upon the primary rachis, the terminal bud minute; sterile secondary 
(geminate) pinnae petiolate (24.5 cm.), very broadly ovate or oblong to transversely ob- 
long, 15-30 cm. long, 15-35 cm. broad, once-pinnate, the rachis nearly straight, narrowly 
marginate above, brownish short-pubescent (especially above), glabrescent; tertiary seg- 
ments 2-5 pairs, subequal, distant or subdistant, petiolate (5-10 mm.), broadly ligulate to 
oblong-lanceolate from a rounded or subcordate base, 10-25 cm. long, 1-3.8 cm. broad, the 
costae nodose-articulate, greatly elevated, straight, stout, extending to the apex, bearing a 
few scattering antrorse hairs, the terminal segment sometimes joined to the next below ; 
veins directed toward the margin at a wide angle, 2-3 times dichotomous, the branches 
straight and parallel, elevated, glabrous; leaf-tissue rigidly coriaceo-herbaceous, lustrous 
upon both surfaces, paler below, glabrous, the margins distinctly crenate-serrate, the teeth 
close. Fertile secondary (geminate) pinnae similar to the sterile, the veins similarly 
dichotomous, nearly all the branches extending to the sporangiophores, the few sterile 
branches excurrent to sharp marginal teeth; sporangiophores very numerous and close, up 
to 1 cm. long, sharply serrate, pilose along the midvein above and at the base below; 
spores coarsely subcristate-tuberculate. 
TYPE LOCALITY: British Guiana, : , . 
DISTRIBUTION: Panauia; also in Trinidad and Guiana; accredited to Santo Domingo. 
ILLUSTRATION: Schkuhr, Joc, czt. pl. 138. 
5. Lygodium heterodoxum Kunze, Farrnkr. 2: 32. 1849. 
Hydroglossum spectabile Liebm. Vidensk. Selsk. Skr. V.1: 299. 1849. 
Hydroglossum heterodoxum Moore, Index Fil. cxiv. 1857. 
Lygodictyon heterodoxum J. Smith, Ferns Brit. & For. 259, 1866. 
