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Published In: Bryologia Europaea 2: 19 (fasc. 33–36. Monogr. 3). 1846. (Bryol. Eur.) Name publication detail
 

Project Name Data (Last Modified On 3/22/2011)
Acceptance : Accepted
Project data     (Last Modified On 3/23/2011)
Discussion:

Blindia acuta is very close to the Southern Hemispheric B. magellanica. Bartlett and Vitt (1986) distinguished the two by the smaller overall size (particularly in the leaves) and shorter upper leaf cells of B. acuta, but these gametophytic distinctions fail to consistently separate North American material from that of South America. In B. acuta the moist setae are erect to flexuous, while in B. magellanica Schimp. in C. Müll. they are cygneous. This distinction is quantitative; Frahm and Frey (1987) have shown that the structural basis for both setae types is the same; they differ only in the degree of asymmetrical thickening of the setal cells. Central American Blindia collections lack sporophytes, and so the name commonly associated with the taxon in Central America has been used.

Blindia acuta is separated from Dicranella and Ditrichum by its inflated, reddish yellow alar cells and from all other Central American members of the Dicranaceae with differentiated alar cells by its lack of internal costal differentiation.

Illustrations: Bartram (1949, Fig. 14 E–H); Crum and Anderson (1981, Fig. 61 A–H); Ireland (1982, Pl. 68 1–9); Bartlett and Vitt (1986, Figs. 1–9); Noguchi (1987, Fig. 49 B).
Habitat: On wet sand; 2250 m.
Distribution in Central America:

GUATEMALA. Quezaltenango: Standley 83684(F, FH).

World Range: Subarctic America, Western and Eastern Canada, Northwestern, North-Central, Northeastern, Southwestern, and Southeastern U.S.A.; Central America; Western South America; Northern, Southwestern, Middle, East and Southeastern Europe; Caucasus, Soviet Middle Asia, Siberia, Soviet Far East, China, Eastern Asia; Indian Subcontinent; Macaronesia, West-Central Tropical Africa, Western Indian Ocean.

 

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Blindia acuta (Hedw.) B.S.G., Bryol. Eur. 2: 19. 1846. Weissia acuta Hedw., Sp. Musc. Frond. 71. 1801. Type: In montonsis Angliae et Norwegiae (lectotype G, fide Barlett & Vitt 1986).

Plants slender, tufted, greenish yellow to brownish; stems sub-erect, 2–7 cm long, branches irregular, central strand absent. Leaves erect to erect-spreading or secund, evenly spaced, lanceolate, 3.0–3.5 mm long, apex abruptly long-subulate; margins entire below, denticulate to sub-entire above, erect or incurved; costa single, long-excurrent, in transverse section guide cells not differentiated, consisting of only stereid cells; cells smooth and incrassate throughout, upper cells short and irregularly rectangular, basal cells linear, 18–55 × 5–9 µm, reddish above; alar cells strongly differentiated, forming distinct groups, dark, abruptly inflated, thin-walled, reddish brown. Sporophytes unknown in Central America [description from Crum and Anderson, 1981] "setae 5–11 mm long, straight or flexuous-curved above; capsules about 1 mm long, obovoid, becoming pyriform and constricted below the mouth when dry and empty; peristome teeth lanceolate, acute, entire or more-or-less split at the tip dark red or red-brown. Spores 13–18 µm, smooth or minutely roughened, brownish."

 

 

 
 
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