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Published In: Acta Bryolichenologica Asiatica 1: 9. 1989[1990]. (Acta Bryolichenol. Asiat.) Name publication detail

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Acceptance : Accepted
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General Reference:

Notes     (Last Modified On 4/1/2009)
general taxon notes:
The genus consists of four species mainly in the Old World tropical regions. It is characterized by lateral pluripapillose leaf cells, a row of inflated alar cells, and strongly collenchymatous exothecial cells. Two species were reported from China (R.-L. Hu & Y.-F. Wang 1981; Y.-F. Wang & Y.-Z. Tao 1992). One species and one variety are recognized in China at present. Radulina elegantissima (Fleisch.) W. R. Buck & B. C. Tan reported from China (Redfearn et al. 1996) was based on misidentified specimens. We have not seen this species from China, but it may be found in the future. It is included in the key for comparison.


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15. Radulina W. R. Buck & B. C. Tan 细锯齿藓属   xi chi xian shu
Acta Bryol. Asiat. 1: 9. 1989 [1990]. Trichosteleum sect. Thelidium (C. Müll.) Jaeg., Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1876–77: 419. 1878. Hypnum sect. Sigmatella subsect. Thelidium C. Müll., Linnaea 39: 466. 1875.
Plants medium-sized, slender, often dull, green to golden, in thin mats. Stems creeping, irregularly branched, branches often ascending and falcate-cuspidate; pseudoparaphyllia foliose; axillary hairs with a single, short, brownish basal cell, elongate, hyaline apical cells. Leaves falcate-secund, lanceolate or sometimes ovate-lanceolate, acuminate, concave; margins plane, serrulate above, serrulate to entire below; costae none, occasionally short and double; leaf cells elongate-hexagonal to linear, firm to thick-walled, somewhat pitted, pluripapillose with papillae uni- to biseriate over lumina; alar cells enlarged, inflated, all but outermost thick-walled. Autoicous. Perichaetia inconspicuous; inner perichaetial leaves oblong-lanceolate, abruptly long acuminate. Setae elongate, slender, reddish, papillose above, smooth below; capsules inclined to horizontal, exothecial cells short-quadrate, strongly collenchymatous; opercula obliquely long rostrate; annuli none; peristome double; exostome teeth narrowly furrowed, cross-striolate below, papillose above on outer surface; trabeculate on the inner surface; endostome segments keeled, perforate; basal membrane high, as long as the teeth; cilia single, stout. Calyptrae cucullate, naked, roughened above. Spores medium-sized, finely papillose.

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1 Plants small; leaves less than 1 mm × 0.20 mm; setae short, less than 5 mm long......... R. elegantissima (not seen)
1 Plants large; leaves more than 1 mm × 0.25 mm; setae long, 5–15 mm.............................................2
2. Leaves ovate-lanceolate with gradually acuminate leaf apices........................... 1a. R. hamata var. hamata
2. Leaves ovate-lanceolate with abruptly acuminate leaf apices................................ 1b. R. hamata var. ferrei
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