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Hedwigiaceae Schimp. Search in NYBG Virtual Herbarium Decrease font Increase font Restore font
 

Published In: Corollarium Bryologiae Europaeae 52. 1856. (Coroll. Bryol. Eur.) Name publication detail
 

Project Name Data (Last Modified On 12/20/2012)
Acceptance : Accepted
Project Data     (Last Modified On 12/16/2011)
General Reference:
Contributor: Wang, Mei-Zhi

Notes     (Last Modified On 12/16/2011)
general taxon notes:

The Hedwigiaceae presently consist of four genera, including Braunia Bruch & Schimp., Hedwigia P. Beauv., Hedwigidium Bruch & Schimp., and Pseudobraunia (Lesq. & James) Broth. Only Braunia and Hedwigia occur in China. The report of Hedwigidium imberbe (Sm.) Bruch & Schimp. from Hebei and Nei Mongol Provinces (P.-T. Tchen 1936; Redfearn et al. 1996) cannot not be verified. I disagree with the treatment by S. He and De Luna (2004) that placed Braunia obtusicuspis Broth. in synonymy of Hedwigidium integrifolium (P. Beauv.) Dixon. I consider B. obtusicuspis as a synonym of B. alopecura (Brid.) Limpr. Therefore, the presence of Hedwigidium in China is uncertain, but it is included in the key below.


 

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Hedwigiaceae
虎尾藓科   hu wei xian ke
by Wang Mei-zhi
 
 

Plants usually stiff, green, grayish green to yellowish brown, or reddish brown to blackish, not glossy, in dense mats on rocks and tree trunks. Stems erect or ascending, irregularly branched, sometimes with flagelliform branches, rhizoids few at the base; central strand absent. Leaves imbricate when dry, erect-spreading or recurved when moist, usually ovate at the base, concave, shortly to long-acuminate at the apex, sometimes with hyaline, dentate or papillose leaf apices; margins often entire, sometimes slightly recurved; costae absent; upper leaf cells small, oval, oblong-oval, subquadrate, rhombic, narrowly oblong or irregular, mostly thick-walled, finely papillose or coarsely papillose; lower cells enlarged, elongate, papillose or gradually becoming smooth; basal juxtacostal cells rectangular or irregularly rhomboidal; alar cells somewhat differentiated, subquadrate, often orange-yellow. Autoicous, rarely dioicous. Perichaetia on lateral branches; perichaetial leaves elongate, sometimes ciliate at the margins. Setae short to elongate; capsules subglobose, ovoid or cylindrical; usually immersed, sometimes exserted, mostly symmetric, wrinkled, sometimes necks present; opercula conic, shortly rostrate; annuli not developed; peristome absent or only with exostome teeth. Calyptrae mitrate or cucullate, sometimes with a few hairs. Spores large, spherical, or irregular, 20–40 µm in diameter, papillose.

 

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1. Leaves with short to long hyaline apices; leaf cells coarsely papillose or with 1–2 forked papillae; margins of perichaetial leaves often ciliate....................................................................................................... 2. Hedwigia
1. Leaves usually without hyaline apices, rarely filiform, with short hyaline tips; leaf cells finely pluripapillose; margins of perichaetial leaves not ciliate..................................................................................... 2
2. Perichaetial leaves less than 4 mm long; setae elongate; capsules exserted.................................. 1. Braunia
2. Perichaetial leaves more than 4 mm long; setae very short; capsules immersed..................................Hedwigidium
 
 
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