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Published In: Bryologia Universa 2: 673. 1827. (Bryol. Univ.) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 1/29/2014)
Acceptance : Accepted
Project data     (Last Modified On 1/29/2014)
Discussion:

In Central America Phyllogonium viride occurs only in Belize. Neither gametangia nor sporo-phytes were found on the eight Central American collections available for study. Sporophytes from South American collections of P. viride have immersed capsules, unlike those of P. fulgens and P. vis-cosum, which are exserted. Gametophytically, the species closely resembles P. fulgens, but the leafy stems and branches are somewhat broader. Lin (1983) indicated that the dry leaves of P. viride are longitudinally striate, but this condition can also be seen in some specimens of P. fulgens. In the ab-sence of sporophytes, the presence of strongly recurved, pungent, non-retuse apices on most leaves of P. viride is the best feature separating it from P. fulgens. The leaves of P. viride, however, are vari-able; sometimes those at the branch tips can be truncate, or the pungent apices of some leaves can be straight. The leaves on ultimate branches, although smaller than those of older branches, are always conduplicate and never concave.

Lin (1983) reported Phyllogonium viride from Costa Rica and Honduras. The Costa Rican spec-imen (Brenes 20589, NY), however, is Phyllogonium fulgens. The Honduran collection (Schipp S-868, NY) from “British Honduras” is actually from Belize.

Illustrations: Brotherus (1906c, Fig. 619 G, as Phyllogonium immersum); Brotherus (1925, Fig. 563 G, as Phyllogonium immersum); Lin (1983, Pl. 4, Fig. 5); Buck (1998, Pl. 61 1–7); Yano (1996, Figs. 43–56). Figure 84.
Habitat: In forests, mostly on branches and trunks of living trees, sometimes on rotted tree trunks; 685–1000 m.
Distribution in Central America:

BELIZE. Cayo: Allen 15045 (MO); Toledo: Allen 18829 (MO).

World Range: Mexico; Central America; Caribbean; Western and Northern South America, Brazil; Subantarctic Islands; Western Indian Ocean.

 

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Plants typically robust, lustrous, golden brown to olive green, older parts sometimes dark brown to black, in complex festoons. Primary stems dark castaneous, irregularly branched, prostrate, at-tached tightly to substrate; stems in cross section with 4–6 rows of small, incrassate, pigmented cells, cortex of larger, thin-walled, hyaline (sometimes pigmented) cells, central strand absent; rhizoids smooth, castaneous, in clusters basal to dorsal side of fragile, appressed, acute to acuminate scale-like leaves. Secondary stems and branches densely foliate, irregularly branched, in complex festoons, to 30 cm long; paraphyllia none; pseudoparaphyllia foliose, obtuse; axillary hairs with 12 short, pig-mented basal cells and 25 elongate, hyaline distal cells, the terminal cells more or less obtuse. Sec-ondary stem and branch leaves erect-spreading, more or less unchanged when dry, distichous, equitant, conduplicate, more or less auriculate, cucullate, not retuse, pungent, strongly recurved, oblong-lanceolate, 1.4–4.0 X 1.2–1.8 mm; margins more or less entire, incurved distally; costae short, double, at times indistinct or ecostate; cells linear-repand, smooth, incrassate, porose, median cells 29–68 r m long, distal and auricular cells shorter; alar cells differentiated, in small clusters, dark castaneous, rounded-quadrate to oblong. Asexual propagula none. Dioicous. Perigonia and perichaetia gemmiform, axillary. Sporophytes not seen in Central American collections, description from Brazilian specimens. Setae short, 0.2–0.5 mm long, smooth, castaneous or yellow. Capsules immersed, erect, radially symmetric, ovate to cylindric, castaneous or yellow, 2.22.5 mm long; exothecial cells irregularly quadrate to ir-regularly oblong, thin- to medium-walled; stomata absent; opercula conic, short- to long-rostrate, 0.6–0.8 mm long; peristome diplolepideous, single, prostome present, fragmentary; exostome teeth in-serted just below capsule mouth, incurved when dry, erect when wet, pale, linear-triangular, more or less denticulate, median line and dorsal trabeculae faint, ventral trabeculae low; endostome absent. Spores anisosporous, 18–29 mm and 32–56 mm, smooth to faintly papillose. Calyptrae not seen, description from Lin (1983), small, 0.8–1.2 X 0.29–0.48 mm, cucullate or mitrate, entire at base, extending to the base of opercula, densely hairy, hairs filamentous, articulate, flexuose, smooth.

 

 

 
 
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