200 FLORA OF SOUTH AMERICA. 
pendulum. ` Splitg. l. c. p. 419. British Guiana, Schomburgk, 
n. 416. ! 
Tribe DIıcKsSONIE®. J. Sm. 
744. Lindsæa reniformis. Dry. Willd. l. c. p. 420. British 
Guiana, Schomburgk, n. 533. 
745. L. stricta. Dry. Willd. l. c. p. 425. Schk. crypt. 
4. 114. L. pusilla, Splitg. l. c. British Guiana, Schom- 
burgk. 
746. L. trapeziformis. Dry. Willd. 1. c. p. 494. L. miti- 
dissima. Rich. Willd. l. c. p. 423. British Guiana, Schom- 
burgk, n. 347. 
747. L. rufescens. Kunze in litt. 1840. British Guiana, 
Schomburgk, n. 346.—1 doubt this being distinct from L. 
Guianensis, the only character being in the dark colour of the 
stipes and rachis, which may be occasioned by a greater or 
less degree of exposure to light and air. 
748. Hymenostachys diversifrons, Bory. Trichomanes ele- 
gans (in part). Rudge, Plant. Guian. t. 35. Willd. l. c. p. 593: 
Serra Mey, British Guiana, Schomburgk, n. 1030.—This rare 
and beautiful fern is distinguished as a genus, distinct from 
Trichomanes, by the circumstance of its venation being 
anastomose. 
749. Trichomanes Vittaria, Dec. Herb. Poiret Encycl. 8. P. 
65. T. floribundum. B. Vittaria, Splitgerber in Tijdscrift, T- 
p.440. Carawanie Mountains, British Guiana, Schomburgk. 
—This is a rare and beautiful species of Trichomanes, having 
simple linear fronds near two feet in length, and about one 
inch in breadth, bearing a continuous row of exserted sori 0n 
each margin, analogous in every respect (but broader) fo? 
pinne of T. floribundum, and which circumstance has induce 
Splitgerber to consider it as only a simple form of that species: 
an opinion to which I cannot assent. 
750. T. crispum. Linn. Willd. 1. c. p. 504. T. cristatum. 
Kaulf. En. fil. p. 265. British Guiana, Schomburgk, n. 442- 
puo MIN 
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