Lindsaya
(named after Archibald Lindsay, an English botanist of the last century). SYN. Lindsaea. Including Diellia, Isoloma (of J. Smith), Schizoloma, Synaphlebium. ORD. Filices. A genus comprising about fifty species of very handsome stove or greenhouse ferns, mainly confined within the tropics. Sori marginal or sub-marginal, placed at the apex of and uniting two or more veins; involucre double, opening outwardly, the inner valve membranaceous, the outer formed of the more or less changed margin of the frond. The species are, for the most part, extremely difficult to cultivate for any length of time; and the best plan is to grow them in well-drained pots of fibrous loam and sand, under the same conditions, as regards atmospheric moisture, &c., as those which are found most suitable for Filmy Ferns. Except where otherwise indicated, the species described below require stove treatment. See also Ferns.
L. adiantoides (Adiantum-like).* sti. nearly tufted, black, polished, wiry, 1in. to 2in. long. fronds 4in. to 6in. long, about 1in. broad, simply pinnate; pinnae 1/2in. long, about 1/4in. deep, the upper imbricated, lower edge straight or slightly curved, upper rounded and broadly lobed about one-third the way down. sori marginal in the lobes. Malay Archipelago, &c., 1840. (H. S. F. i. 61c.) L. concinna (neat). rhiz. short-creeping. sti. 2in. to 4in. long, wiry, erect. fronds 6in. to 12in. long, 3/4in. broad, simply pinnate; pinnae four lines long, two lines deep, very blunt on the outer edge, the upper edge very slightly crenate, upper ones close together but scarcely imbricated. sori in a continuous or slightly interrupted line along the upper edge. Philippine Islands and Borneo, 1842. This species is closely allied to L. cultrata. (H. S. F. i. 61B.) L. cultrata (knife-shaped).* sti. wiry, flexuose, 3in. to 6in. long. fronds 6in. to 12in. long, about 1in. broad, simply pinnate; largest pinnae 1/2in. to 3/4in. deep, not imbricated, the lower margin straight or slightly curved, usually upwards, the upper edge slightly lobed, so that the continuity of the line of fructification is broken, sometimes nearly entire. North of India. An elegant little species, yielding a fragrance similar to the Sweet-scented Vernal-grass (Anthoxanthum odoratum). (H. S. F. i. 62c, under name of L. Lobbiana).
L. divergens (wide-spreading). rhiz. creeping, wiry, fibrillose. sti. wiry, erect, 4in. to 6in. long, 1 1/2in. to 2in. broad, simply pinnate; pinnae 3/4in. to 1in. long, two to three lines broad, obliquely truncate at the base below, auricled at the base above, margin entire, point bluntish. sori in a continuous line along both edges. Malayan Peninsula. SYN. Isoloma divergens. L. dubia (doubtful). rhiz. short-creeping. sti. close together, wiry, 3in. to 6in. long. fronds 4in. to 8in. long, 1 1/2in. to 2in. broad, simply pinnate; pinnae 1in. long, not more than 1/8in. broad; upper edge crenated towards the gradually-narrowing point, even the upper ones with usually 1/4in. to 1/2in. between them, often not truly dimidiate, but with the costa becoming central towards the point. Line of the sori not interrupted till it reaches the crenations of the outer third of the upper margin. Venezuela, Guiana, &c. (H. S. F. i. 64C.) L. elegans (elegant). A synonym of L. stricta.
L. ensifolia (sword-fronded). rhiz. creeping, stout, paleaceous. sti. 6in. to 9in. long, wiry, flexuose. fronds 6in. to 12in. long, 3in. to 4in. broad, with a linear-lanceolate, simple or pinnatifid point, simply pinnate below; pinnae usually in numerous pairs, all stalked, 1 1/2in. to 6in. long, 1/4in. to 1in. broad, linear-acuminate to lanceolate, sterile ones a little toothed. sori in a continuous marginal line. Hong Kong, Himalayas, &c. SYN. Schizoloma ensifolia. (H. G. F. 62.) L. falcata (sickle-shaped). sti. 3in. to 4in. long, strong, erect, densely paleaceous. fronds 1ft. to 1 1/2ft. long, 2in. to 4in. broad, lanceolate, simply pinnate; pinnae 1in. to 2in. long, 1/4in. to 3/8in. broad, linear-lanceolate, falcate, acuminate, slightly undulated at the margin, the upper half rather broader and auricled at the base, the lower ones very short and blunt. sori marginal, transversely oblong. Sandwich Islands. SYN. Diellia falcata.
L. flabellulata (fan-shaped). rhiz. short-creeping. sti. wiry, erect, brownish-black, polished. fronds 6in. to 12in. long, simple or with one or several pairs of lateral branches; pinnules 1/4in. to 1/2in. long, about 1/4in. deep, the lower line nearly straight or decurved, the upper rounded, entire or lobed, point broadly rounded; venation flabellate. sori in a continous line, except when interrupted by the lobes. India, China, to North Australia. (H. S. F. i. 63.) L. tenera differs from this species only in its thinner texture.
L. guianensis (Guiana).* rhiz. short-creeping. sti. 6in. to 12in. long, rigid, erect. fronds 1ft. to 2ft. long, with an entire point and one to six pairs of lateral erecto-patent branches, 6in. to 9in. long, which are sometimes again branched; pinnules 1/2in. long, 1/4in. broad, not lobed, and the outer edge bluntly rounded, closely packed and sometimes imbricated. sori in a continuous line. Tropical America, 1845. A beautiful species, closely allied to L. trapeziformis. (H. S. F. i. 62A.) L. heterophylla (variable-leaved). rhiz, short-creeping. sti. 4in. to 8in. long, firm, naked, erect. fronds 6in. to 12in. long, 3in. to 6in. broad, lanceolate or oblong-deltoid, varying from simply pinnate, with large, linear-lanceolate, entire pinnae, to bipinnate, with erecto-patent branches, 3in. to 4in. long, with oblong-lanceolate blunt pinnules, 1/2in. to 1in. long, 1/4in. broad. sori in continuous marginal lines. Neilgherries to Malaya. SYN. Schizoloma heterophyllum.
L. horizontalis (horizontal). A synonym of L. trapeziformis. L. lanuginosa (woolly). rhiz. stout, creeping, clothed with fibrillose scales. sti. stout, erect, 4in. to 6in. long. fronds 1ft. to 2ft. long, 3in. to 4in. broad, simply pinnate; pinnae 1 1/2in. to 2in. long, 1/4in. to 1/2in. broad, linear, entire or very slightly toothed towards the point, which is acute in the fertile, bluntly rounded in the barren frond. sori in a continuous line along both edges. Malayan Peninsula, &c. SYN. Isoloma lanuginosum. L. linearis (linear). rhiz. wiry, creeping. sti. wiry, flexuose, black, shining, 4in. to 8in. long. fronds 6in. to 12in. long, 1/2in. broad, simply pinnate; pinnae 1/4in.long, two lines deep upper edge very slightly toothed, the lower ones often with a considerable space between them. sori in a continuous line along the upper edge. Australia, New Zealand, &c., 1820. Greenhouse.
L. lobata (lobed). rhiz. short-creeping. sti. 6in. to 9in. long, firm, erect. fronds simple or with a long unbranched apex, and one to six pairs of erecto-patent branches, 3in. to 6in. long; pinnules about 1/2in. long, 1/4in. broad, lower ones decurved principally at base, the outer margin rounded, upper three or four times lobed. sori marginal in the lobes. Neilgherries, Ceylon, Polynesian Islands, &c. SYNS. L. obtusa, L. recurvata (H. S. F. i. 70A), Synaphlebium lobatum.
L. Lobbiana (Lobb's). A synonym of L. cultrata.
L. media (intermediate). sti. 6in. to 12in. long, wiry, flexuose. fronds 6in. to 12in. long, deltoid in general outline, bi-or tripinnate; pinnae 3in. to 4in. long, two to three lines deep, the lower line nearly straight the upper one rounded. sori in a continuous marginal line. Tropical Australia, &c. Greenhouse. SYN. Synaphlebium medium.
L. microphylla (small-fronded). rhiz. creeping, fibrillose. sti. flexuose, wiry, 3in. to 6in. long. fronds 6in. to 18in. long, 2in. to 4in. broad, bi-or tripinnatifid; primary pinnae distant, flexuose, 1in. to 4in. long; pinnules entire, or cut down to the rachis into several obversely triangular lobes, which, when fertile, are often not more than one line broad. sori in a continuous marginal line. New Zealand and temperate Australia. Greenhouse. SYN. Isoloma microphyllum.
L. oblongifolia (oblong-fronded). A synonym of L. pectinata. L. obtusa (obtuse). A synonym of L. lobata.
L. parvula (small). sti. 6in. to 8in. long, naked, stramineous. fronds about the same length, bipinnate when fully developed, with a few distant spreading pinnae, 2in. to 3in. long, 3/8in. broad; pinnules close, sub-rhomboidal, less than 1/4in. broad, upper edge slightly curved. sori continuous. Trinidad. L. pectinata (comb-like). rhiz. stout, wide-creeping, scandent. sti. erect, very short. fronds 1ft. to 1 1/2ft. long, 1in. to 2in. broad, simply pinnate; pinnae 1/2in. to 3/4in. long, 1/4in. deep, the lower line nearly straight, the upper margin round, slightly crenate, point not very blunt, close together, but not imbricated. sori in an interrupted line along the upper edge. Malayan Peninsula. SYNS. L. oblongifolia, Synaphlebium pectinatum. (H. S. F. i. 61D.) L. recurvata (recurved). A synonym of L. lobata.
L. reniformis (kidney-shaped).* sti. wiry, flexuose, 4in. to 6in. long. fronds sagittate-acuminate, with a deep basal sinus, 2in. to 4in. across, sometimes lobed. sori continuous along upper and outer edge. Guiana. A very rare species, resembling Adiantum reniforme and Trichomanes reniforme. SYN. Isoloma reniforme.
L. rigida (rigid). rhiz. wide-creeping, sti. 4in. to 6in. long, rigid, erect, prickly towards the base. fronds with a long unbranched central point, and one to four pairs of flexuose lateral branches, 4in. to 8in. long; pinnules three to four lines broad, two lines deep, lower edge often falcate, upper three or four-lobed. sori in a marginal line on the lobes. Malayan Peninsula. This species resembles L. stricta. (H. S. F. i. 63A.) L. sagittata (arrow-pointed). sti. wiry, flexuose, 4in. to 6in. long, black, polished. fronds sagittate-acuminate, with a deep basal sinus, 2in. to 4in. across, sometimes lobed. sori continuous Guadeloupe and French Guiana. L. stricta (upright).* rhiz. short-creeping, fibrillose. sti. rigid, erect, 1ft. to 2ft. long. fronds simply pinnate, 1ft. to 2ft. long, 1/2in. broad, or with one or two pairs of erect, rigid, lateral branches; pinnules 1/4in. broad, less deep, the lower line often considerably decurved, the upper rounded, nearly entire, closely placed. sori in a continuous line round the upper edge. Tropical America, 1839. A variable and pretty form. SYN. L. elegans.
L. tenera (tender). A form of L. flabellulata.
L. trapeziformis (diamond-shaped).* rhiz. short, creeping, sti. strong, erect, 6in. to 12in. long. fronds 6in. to 15in. long, with a long entire point and one to four pairs of rather rigidly erectopatent branches, which are often 6in. to 12in. long; pinnae 3/4in. to 1 1/2in. long, 1/4in. to 1/2in. deep, the lower line nearly straight, or curved upwards or downwards, the upper rounded, entire, closely packed, but scarcely imbricated. sori in a continuous line round the upper margin. Tropical Asia and America, &c., 1819. A beautiful species. SYN. L. horizontalis. (H. S. F. i. 62B.) L. trichomanoides (Trichomanes-like). rhiz. creeping, fibrillose. sti. 4in. to 6in. long, slender, wiry. fronds 4in. to 9in. long, 2in. to 3in. broad, ovate-oblong, bipinnatifid; pinnae 2in. to 3in. long, lanceolate, erecto-patent, cut down quite to the rachis below into cuneate pinnules, which are again broadly lobed on the upper edge. New Zealand, &c. A pretty greenhouse or Wardian case plant.