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Published In: Handbook of British Mosses 145. 1863. (Handb. Brit. Mosses) Name publication detail
 

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Notes     (Last Modified On 2/27/2009)
general taxon notes:

 

There are different views regarding the familial placement of Platydictya. Some have placed it in the Hypnaceae, primarily based on its short, nearly erect capsules and double short costae (Crum & Anderson 1981; Vitt 1984; Buck & Goffinet 2000; Crosby et al. 2000); while others still accepted it in the Amblystegiaceae (Kanda 1975; P.-C. Chen et al. 1978; Noguchi 1991). We are treating it as a genus of the Amblystegiaceae following the classification system of P.-C. Chen et al. (1978). Two species of Platydictya are recognized in China.

 

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14. Platydictya Berk.   细柳藓属   xi liu xian shu
Handb. Brit. Mosses 145. 1863.
Amblystegiella Loeske, Moosfl. Harz. 294. 1903, nom. illeg.
 
Plants minute, very delicate, soft or somewhat rigid, light to dark green, in loose mats. Stems slender, prostrate, irregularly branched; central strand absent; rhizoids irregularly forked, smooth; pseudoparaphyllia filamentous or foliose. Stem and branch leaves similar, lanceolate or linear-lanceolate; margins entire or serrulate; costae single, or indistinct; median leaf cells rhomboidal or elongate-hexagonal; alar cells numerous, quadrate, often oblate, or shortly rectangular. Dioicous or autoicous. Inner perichaetial leaves straight, lanceolate, with a long apex; costae forked. Setae slender, curved when dry, yellowish or purple; capsules usually erect, symmetric or somewhat arcuate, rarely slightly inclined, elongate-ovoid or shortly cylindrical, constricted below mouth when dry; annuli differentiated; cilia usually single, sometimes absent, rarely 2–3, nodulose. Spores small, smooth to papillose.
 

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1. Plants soft, glossy, dioicous; leaf margins serrulate; alar cells few..............................1. P. jungermannioides
1. Plants somewhat rigid, dull, autoicous; leaf margins entire; alar cells numerous........................... 2. P. subtilis

 

 
 
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