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Published In: Journal of the Linnean Society, Botany 12: 499. 1869. (J. Linn. Soc., Bot.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 9/19/2009)
Acceptance : Accepted
Project Data     (Last Modified On 4/4/2013)
country distribution: Venezuela, Colombia, Ecuador, Peru, Bolivia
EcoRegions: Montane Forest, Amazon (incl. Llanos)
elevation: 0-500, 500-1000, 1000-1500, 1500-2000, 2000-2500, 2500-3000
substrate: soil, rocks, leaf litter / humus, logs, treelets and trees
frequency: common

Notes     (Last Modified On 4/4/2013)
Notes:
Ecology: Lowland to montane forest; on soil, humus, leaf litter, logs, base of trees. Elevation: 35-2600 m (Venezuela: 35-1500 m, Colombia: 200-2600 m, Ecuador: 200-1800 m, Peru: 100-1300 m, Bolivia: 190-2340 m). Distribution: Widespread in the Neotropics, eastern North America. Isopterygium chrismarii (Müll. Hal.) Mitt. (type not located, fide Ireland) reported from Meta and Valle (at elevations from 5-500 m) probably represents I. tenerum.
 
Isopterygium tenerum is characterized by the ovate-acuminate leaves (mostly less than 1.2 mm long), few quadrate to short rectangular alar cells, 2-4 along margin, and strongly constricted below the capsule mouth. This species is the most common member of the genus among the tropical Andean countries. Generally replaced by Isopterygium byssobolax in the southern Bolivian montane forest. Isopterygium tenerum is likely to be confused with I. byssobolax, the former is distinguished by the 1-3(4) quadrate cells along the leaf base margin, the latter by the more numerous (4-10) quadrate cells. Synonyms include Isopterygium cylindraceum (Müll. Hal.) Paris, I. eutrypherum (Müll. Hal.) Paris, I. hospitans (Hampe) A. Jaeger, I. peruvianum Broth., I. pseudo-tenerum (Broth. & Kindb.) Broth., and Leskea pygmaea Taylor.

 

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Isopterygium tenerum (Sw.) Mitt., J. Linn. Soc., Bot. 12: 499. 1869. Hypnum tenerum Sw., Fl. Ind. Occ. 3: 1817. 1806. Type: Jamaica, Swartz 2719 (S, holotype; isotypes BM, C).

Leskea pygmaea Taylor, London J. Bot. 7: 197. 1848. Type: Ecuador. On Octoblepharum albidum Puerto del Napo, Villavicensio.

Hypnum hospitans Hampe, Ann. Sci. Nat., Bot. 5, 5: 313. 1866. Isopterygium hospitans (Hampe) A. Jaeger, Ber. Thätigk. St. Gallischen Naturwiss Ges. 1876-77: 434. 1878. Type: Colombia. Cundinamarca, Bogota, Tequendama, 2500 m, Lindig s.n. (BM, holotype; isotype M).

Hypnum eutrypherum Müll. Hal., Linnaea 42: 437. 1879. Isopterygium eutrypherum (Müll. Hal.) Paris, Index Bryol. 707. 1897. Type: Venezuela. Prope Colonian Tovar, Fendler 153 (BM, H).

Taxicaulis cylindraceus Müll. Hal., Nuovo Giorn. Bot. Ital. n. ser. 4: 151. 1897. Isopterygium cylindraceum Müll. Hal.) Paris, Index Bryol. Suppl. 218. 1900. Type: Bolivia. Cochabamba, prope Choquecamata, Jun 1889, Germain s.n. (H).

Plagiothecium pseudo-tenerum Broth. & Kindb. ex Kindb., Rev. Bryol. 28: 54. 1901. Isopterygium pseudo-tenerum (Broth. & Kindb.) Broth., Nat. Pflanzenfam. 1(3): 1082. 1908. Type: Colombia. Magdalena, Bonda, aux environs de Santa Marta, Dec 1898, Baker s.n. (S, holotype).

Isopterygium peruvianum Broth., Bot. Jahrb. Syst. 56 (Beibl. 123): 21. 1920. Type: Peru. Prov. Churchusnayo, Wald, auf faulendem Holz, 900 m, Weberbauer 1253.

 

 


 

 
 
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