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Published In: Svensk Botanisk Tidskrift 47: 253. 1953. (Svensk Bot. Tidskr.) Name publication detail

Project Name Data (Last Modified On 3/16/2009)
Acceptance : Accepted
Project Data     (Last Modified On 3/16/2009)
General Reference:

Illustration & Map     (Last Modified On 3/16/2009)
Related Objects:
Illustrations: X.-J. Li (ed.) 2000 (Pl. 16, figs. 11–18); T. Cao & Vitt 1986 (Fig. 57).
Click here for distribution map.
Map: Schistidium trichodon (Brid.) Poelt (Distribution in China)

Distribution     (Last Modified On 3/16/2009)
Habitat: on boulders in creek beds in mountain forest zones; alt. ca. 2600 m.
Distribution: China, Japan, India, Europe, and North America.

Specimens Examined     (Last Modified On 3/16/2009)
Specimens Examined:
Chinese specimens examined: Shaanxi: Mt. Huashan, M.-X. Zhang 396 (ALTA, IFSBH). Sichuan: Wo-long Natural Reserve, Q.-Z. Zheng 144 (ALTA, IFSBH). Taiwan: Miao-li Co., Shevock 18078 (CAS, MO); Tai-chung Co., Koponen 17865 (ALTA, H), Shevock 18165 (CAS, MO). Xinjiang: Wu-su Co., S. He 951112 (MO). Yunnan: Reported from Yulong Shan by Blom (1996).

Notes     (Last Modified On 3/16/2009)
general taxon notes:
Schistidium trichodon is characterized by linear-lanceolate peristome teeth that are often entire with the papillae in rows on the outer surface. Other distinct features of Schistidium trichodon are slender plants in loose tufts, muticous or very short hair-pointed leaves, and costa smooth on the back surface.
Bremer (1980b) selected a neotype for Grimmia trichodon based on the assumption that the original material had been lost. Moreover, it appeared that neither Philibert (1898) nor Poelt (1953) had studied the type. We have seen a specimen of Grimmia trichodon deposited in Bridel’s herbarium in Berlin, and we consider this the holotype. The specimen has an annotation on the sheet and has characters matching well with Bridel’s original description. Since the original type has been discovered, the neotype selected by Bremer (1980b) is illegitimate.
Deguchi (1978) considered Schistidium trichodon as a modification of S. gracile. On the contrary, after studying the type specimen of Grimmia apocarpa var. gracilis (basionym of Schistidium gracile), Blom (1996) discovered that the specimen contained two elements with one being S. trichodon and the other S. papillosum Culm. Therefore, Schistidium gracile should be treated as a synonym of S. trichodon. Furthermore, we do not agree with Deguchi (1978) in placing S. strictum under synonymy of S. gracile (see discussion under S. strictum).


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7. Schistidium trichodon (Brid.) Poelt   长齿连轴藓   chang-chi lian-zhou xian
Svensk. Bot. Tidskr. 47: 253. 1953. Grimmia trichodon Brid., Bryol. Univ. 1: 171. 1826. Type. Italy: “In Alpibus italicis et in Apenninis aestate 1820 cum thecis deoperculatis legimus.” (holotype B-Bridel).
Schistidium apocarpum subsp. gracile (Schleich. ex Röhl.) Meylan, Bull. Soc. Vaud. Sci. Nat. ser. 5, 41: 100. 1905. Schistidium gracile (Schleich. ex Röhl.) Limpr., Laubm. Deutschl. 1: 705. 1869. Schistidium apocarpum var. gracile (Schleich. ex Röhl.) Bruch & Schimp. in B.S.G., Bryol. Eur. 3: 99 (fasc. 25–28. Monogr. 7). 1845. Grimmia apocarpa var. gracilis Schleich. ex Röhl., Deutschl. Fl. (ed. 2), Kryptog. Gew. 3: 47. 1813. Grimmia gracilis Schleich., Crypt. Helv. Cent. 3, No. 14 et Catal. 1807, nom. nud. Grimmia gracilis Schleich. ex Schwaegr., Sp. Musc. Frond., Suppl. 1(l): 98, fig. 23. 1811, nom. illeg. non Grimmia gracilis (Hedw.) Web. & Mohr (1803). Type. “Schleich cent. 3” (lectotype G, designated by Deguchi 1978).
Plants slender, medium-sized, up to 2 cm high, yellowish green above, dark brown below, in loose tufts. Stems branched, without central strand in cross section. Leaves sparsely set, erect, imbricate when dry, spreading when moist, lanceolate, keeled above, 1.4–1.8 mm long, muticous or with some hyaline cells at apex; margins recurved on both sides, bistratose above; costa percurrent, smooth or nearly so on abaxial surface, consisting of nearly uniform cells in cross section; upper cells unistratose, irregularly quadrate, 5–7 µm wide, with thick, more or less sinuose walls; median cells short-rectangular, 7–11 µm × 4–5 µm, with sinuose walls; basal marginal cells oblate to shortly rectangular, 6–20 µm × 7–9 µm, with transverse walls as thick as longitudinal walls; basal juxtacostal cells elongate-rectangular, with thick, smooth to slightly sinuose walls. Autoicous. Perichaetial leaves larger than stem leaves, muticous or with very short, hyaline hair-points. Setae shorter than capsules, straight; capsules immersed, reddish brown, oblong-ovoid, erect, symmetric; exothecial cells oblate to rounded-quadrate, with thin walls; annuli absent; opercula with long, straight or oblique beaks; peristome teeth reddish brown, linear-lanceolate, long, and thin, up to 0.5–0.6 mm long, entire, outer surface densely papillose in rows, inner surface papillose throughout. Calyptrae small, mitrate. Spores small, 9–11 µm in diameter, yellowish green, papillose.


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