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Published In: Flora 2: 88. 1819. (Flora) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 3/10/2009)
Acceptance : Accepted
Project Data     (Last Modified On 3/10/2009)
General Reference:

Illustration & Map     (Last Modified On 3/10/2009)
Related Objects:
Illustrations: T. Cao & C. Gao 1988 (Fig. 6).
Click here for distribution map.
Map: Trematodon ambiguus (Hedw.) Hornsch. (Distribution in China)

Distribution     (Last Modified On 3/10/2009)
Habitat: on wet soil and disturbed places by streams.
Distribution: China, Nepal, India, Myanmar, Japan, Russian Far East, Europe, North and Central America.

Specimens Examined     (Last Modified On 3/10/2009)
Specimens Examined:


Chinese specimens examined: Heilongjiang: Dailing Pref., P.-C. Chen & C. Gao 676 (IFSBH). Sichuan: Ping-wu Co., Q. Li 10275 (IFSBH). Yunnan: Kunming City, Z.-R. Zhang 74 (KUN); Meng-la Co., Redfearn et al. 33758, 34122 (MO).


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1. Trematodon ambiguus (Hedw.) Hornsch.   北方长蒴藓 bei-fang chang-shuo xian
Flora 2: 88. 1819. Dicranum ambiguum Hedw., Sp. Musc. Frond. 150. 1801. Syntypes. Sweden and Austria.
Plants very small, 5–7 mm high, yellowish green, gregarious or scattered. Stems erect, usually simple. Leaves 2–3 mm long, erect or somewhat contorted when dry, erect-spreading when moist, oblong, clasping at base, abruptly narrowed from the shoulder to a long-awned, blunt apex; margins plane, entire; costa strong, filling the entire acumen, smooth on the back; leaf cells at the shoulder irregularly short-rectangular to rhombic, 13–26 µm × 5–8 µm, rather thick-walled; basal cells narrowly long-rectangular, 40–90 µm × 8–13 µm, rather thin-walled, lax, with several narrower cells (4–5 µm wide) near the margins. Autoicous. Perichaetial leaves similar to the upper stem leaves. Setae straight, 16–20 mm long, yellowish; capsules inclined, urns short-cylindric, 1.2–2.0 mm long, neck 1.3–2.0 mm long, strumose at base; opercula long-rostrate; annuli well developed, deciduous, revoluble; stomata superficial; peristome teeth reddish, linear-lanceolate, vertically striate nearly to the tips, finely papillose at the tips. Spores 26–30 µm in diameter, yellowish, strongly papillose.


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