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Published In: Revue Bryologique 36: 68. 1909. (Rev. Bryol.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 10/18/2013)
Acceptance : Accepted
Note : by Jerry A. Snider
Project data     (Last Modified On 6/7/2011)
Discussion: The genus differs from Pleuridium in having operculate and annulate capsules with a short, though distinct neck and fairly large, deeply lobed, mitrate calyptrae. It shows some resemblance to the Bruchiaceae, but the capsule neck scarcely approaches that of Bruchia, certainly not that of Trematodon. The large, reniform spores are Bruchia-like. It may be that the genus can best be retained in the Ditrichaceae, while providing some linkage to the Bruchiaceae. Contrary to a suggestion by Seppelt (1982), the Asiatic Pringleella. sinensis Broth. is not conspecific with Astomiopsis sinensis Broth. Certainly Pringleella, Astomiopsis, and also Melophyllum need better definition, and the relationship of Pringleella subulata (C. Muell.) Broth. and Astomiopsis subulata (C. Muell.) Broth. of South America needs to be ascertained. It may be that the supposed synonymy of Pringleella Broth. with the older Pringleella Card. should be investigated anew. Several recent papers touch on this difficult problem (Buck, 1979b; Buck & Landrum, 1977; Buck & Zander, 1980; Zander, 1978b).
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Plants very small, erect, loosely tufted. Leaves small below, much larger and crowded above, gradually long-acuminate from a lanceolate to oblong-ovate base, channeled above, entire; costa broad and flat, filling most of the subula and subpercurrent to ± excurrent; cells elongate throughout, rectangular to subrhomboidal, smooth. Autoicous (with a large, lateral antheridial bud near the base). Setae short; capsules immersed or emergent, erect, ovoid from a short, thick neck, narrowed at the mouth, smooth; annulus persistent, consisting of thick-walled cells; operculum slightly convex, long-rostrate; peristome none. Spores large, subreniform, spinose. Calyptrae campanulate-mitrate, covering about half the urn.

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