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

Published In: Corollarium Bryologiae Europaeae 11. 1856. (Coroll. Bryol. Eur.) Name publication detail
 

Project Name Data (Last Modified On 3/24/2011)
Acceptance : Accepted
Project data     (Last Modified On 3/24/2011)
Discussion:

The Dicranaceae are a large family difficult to characterize because of internal variability and intergradations with nearby families. In general the plants are erect, the leaves narrow, the costa single and well-developed, the setae elongate, the capsules exserted, and the peristome teeth have a 2:3 haplolepideous pattern. Crum and Anderson (1981) noted that well-developed alar cells are generally associated with the family, but undifferentiated alar cells are commonly encountered, and both character states are found in some genera.

In Central America the genera can be clustered into four, weakly demarcated subfamilies. The Paraleucobryoideae are here synonymized with the Campylopodioideae. This decision is necessitated by the close gametophytic relationship of Paraleucobryum and Campylopus. Sporophytically only the well developed annulus of the Paraleucobryoideae separates the two. This character is of uncertain value in the Dicranaceae, due to its variable expression in the Anisothecioideae and the Dicranoideae.

The subfamilies and their genera, arranged systematically, are:

Anisothecioideae: Aongstroemia, Anisothecium, Dicranella, and Microcampylopus.

Campylopodioideae: Campylopodiella, Campylopus, Bryohumbertia, Dicranodontium, and Pilopogon.

Dicranoideae: Chorisodontium, Dicranum, Symblepharis, Holomitrium, Eucamptodontopsis, Schliephackea, Leucoloma, and Cynodontium.

Rhabodoweisioideae: Rhabdoweisia.


 

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DICRANACEAE

Plants minute to robust, closely tufted; stems erect (rarely pendent), simple, forked or irregularly branched. Leaves evenly distributed around the stem, mostly long-lanceolate, erect or secund, often crispate; costa single, ending near apex to excurrent; cells smooth or papillose; alar cells strongly differentiated or undifferentiated. Setae mostly elongate, straight, flexuous or cygneous; capsules erect or curved, cylindrical or ovoid, smooth or furrowed; annuli present and complex to simple or absent; stomata present or absent; peristome usually present, of 16 divided or entire teeth, striate or smooth below, papillose or smooth above. Calyptrae cucullate, entire or fringed at base.

 

 
 
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