Flora of the British West Indian Islands / by A.H.R. Grisebach.

  • August Grisebach
Date:
1864
Catalogue details

Licence: Public Domain Mark

Credit: Flora of the British West Indian Islands / by A.H.R. Grisebach. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    710/840 (page 688)
    Fern; frond %-pinnate: leaflets adiantiform; veins dichotomous, free; sori in a line, parallel to the margin. 230. D. lunulata, Desv.—Plum. Fil. t. S6. Kze. Farnkr. t. 84. Hook. Gen. t. 8.— Adiantum, Houtt. Aspidium truncatulum, Sw.—Leaflets dimidiate-trapezoid, blunt, 10'- 6' long; sori either juxtamarginal or distant from the margin.—Hab. Trinidad!, Or.; [Cuba ! to Brazil!; Pacific islands !; trop. Asia ! and Africa to Natal]. 40. ASPIDIUM, Sw. Sori round (rarely oval), usually dorsal on a slender veinlet: indusium above the sorus, or abortive (-suppressed).—Petiole not jointed at the base. There is no other universal character to distinguish Aspidium from Polypodium, but the indusium : but from a series of examples, in which the indusium is present and suppressed in the same species, it is probable, as Mettenius has suggested, that most forms of Polypo- dium, sect. Phegopteris, will eventually prove to possess an indusium (though it may be suppressed in most individuals). Hence I put the names of the Wesr Indian species of Phe- gopteris at the head of those divisions of Aspidium, to which they would belong if an indu- sium was observed : such forms are easily distinguished from Eupolypodium by the dorsal insertion of the sori, the slender veinlets, and the petiole not jointed at the base, though all these characters have no universal, generic value. § 1. Veinlets thickened at the summit, forked-dichotomous, free. * Leaf pinnate ; sori terminal on the anterior branch of forked veinlets (Nephrolepis, Schott). 231. A. pectinatum, TV. Leaf pinnate: leaflets shortly oblong, blunt, dimidiate- truncate and upwards auricled at the base ; sori half as much distant from the margin as from the midrib : indusium semilunar, with a broad sinus.—Schk. Crypt, t. 29. b. de.rlr. —Nephrolepis, Schott. A. trapezoides, Schk. (non Sw.). N. tuberosa, Hook, (ex parte, Lechl. 2155.).—1'-2' high; leaflets 6'-8' long.—Hab. Jamaica!, Macf., Wils., At.: [Venezuela! to Peru!]. 232. A. exaltatum, Sw. Leaf pinnate: leaflets oblong-lanceolate, acute, or bluntish, truncate or subcordate and upivards auricled at the base; sori half as much distant from the margin as from the midrib, or juxtamarginal: indusium cordate-orbicular, or reniform, with a broad, open sinus.—St. t. 31. Plum. Fil. t. 63.—Polypodium, L. Nephrolepis, Schott.—Trailing : “ twice in the year (from the rainy seasons), the stem starts afresh by a prolongation of the rliaehis, remaining afterwards in a quiescent state, at length often attain- ing a height of 15-20', supporting itself on the bushes and trees ” (Al.); leaflets l-2 long. —Hab. Jamaica!, Pd., Hartw., Al.; S. Vincent!, Guild. ; [Cuba! to Brazil!; Pacific is- lands !; trop. Asia aud Africa]. 233. A. punctulatum, Sw. Leaf pinnate: leaflets oblong-linear, serrulate, acuminate, truncate or shortly cuneate at the base, rarely produced upwards, into a short auricle, lowest short, blunt; sori half as much distant from the margin as from the midrib or juxtamarginal: indusium cordate-orbicular, with a narrow sinus and usually superincumbent auricles.- Plum. Fil. t. 112. Fee, Polypod. t. 23. C.f. 1.—Nephrolepis acuta, Hook.—Variable, com- prising c.g. A. acutum, Schk. (Crypt, t. 31) : a form with the rhachis aud leaflets hai i y be- neath (Syn. A. paraense, W., Kze.!), A. acuminatum, W. : a glabrous form, A. ensifolium, Schk. (Crypt, t. 32), Kze.!: the form with juxtamarginal sori. Leaflets 2-4 long.— Hab. Jamaica !, Pd.; Dominica !, Imr. ; [Cuba! to Brazil!, and all tropical countries], 234. A. sesquipedale, TV. Leaf pinnate: leaflets oblong-lanceuluic, bluntish, crc- nate-serrate above, truncate and upward produced into a deltoid auricle at the base; sori half as much distant from the margin as from the midrib, or juxtamarginal: indusium cordate-orbicular, with a narrow sinus and usually nccumbcnt auricles.—Schk. Crypt, t. 32 b. A. exaltatum, Schk., Sieb. Mart. 357. Nephrolepis neglecta, Kze. (ex Schk., non Hortor.). N. exallala. Hook, (exparte, Lechl. 2515). N. vaiida, Kze. !; a form with the sori distant from the margin.—Several feet high ; leaflets l-2 long.—11ab. West Indies (Sw.); [Martinique!; Guiana! to Peru !].