Haplocladium angustifolium (Hampe & Müll.Hal.) Broth.

Authority

Buck, William R. 1998. Pleurocarpous mosses of the West Indies. Mem. New York Bot. Gard. 82: 1-400.

Family

Leskeaceae

Scientific Name

Haplocladium angustifolium (Hampe & Müll.Hal.) Broth.

Description

Species Description - Plants small and slender, in ± stiff, mostly small, dense, often golden mats. Stems creeping, to ca. 2 cm, regularly to irregularly 1-pinnate, the branches often curved when dry, ca. 3-4 mm long; in cross-section with 2-3 rows of small thick-walled cells surrounding larger thinner-walled cells, central strand small, of small thin-walled cells; paraphyllia few to abundant on stems, few to none on branches, filamentous, uniseriate above and biseriate below, the distal cell pointed, all cells nonpapillose; pseudoparaphyllia foliose; axillary hairs with a single short brown basal cell and 2 elongate hyaline distal cells. Stem and branch leaves somewhat differentiated, stem leaves erect when dry, spreading when moist, broadly ovate, 0.55-0.8 mm long, abruptly long-acuminate, the acumen longer than the base, slightly concave; margins serrulate above, crenulate below, plane or narrowly recurved below; costa single, strong, ending in and filling the acumen, ± excurrent; cells mostly oval to short-rectangular, (1-) 1.5-3:1, prorulose at back at upper cell ends, firm-walled; alar cells not differentiated. Branch leaves smaller than stem leaves, erect when dry, spreading when moist, lanceolate, 0.3-0.5 mm long, acuminate, somewhat concave; margins serrulate above, often strongly so, crenulate below, plane or erect; costa single, strong, ending in and filling the acumen; cells oval to short-rectangular, 1.5-3:1, prorulose at back at upper cell ends, often prominently so, firm-walled; alar cells quadrate, extending up the margins. Asexual propagula none. Autoicous. Perichaetia conspicuous; leaves enlarged, pale, erect, oblong-lanceolate, 1.1-1.4 mm long, acuminate; margins serrulate, plane; costa single, strong, ending in the acumen; cells long-rectangular, ca. 5:1, smooth, firm-walled. Setae elongate, smooth, reddish, 1.21.8 cm long; capsules inclined, subarcuate, asymmetric, short-cylindric, 1.5-2 mm long; exothecial cells subquadrate to short-rectangular, 1-2:1, thin- to firm-walled; annulus of 2-3 rows of small rectangular cells, deciduous; operculum high-conic; exostome teeth yellow to yellow-brown, ± shouldered, narrowly bordered, on the front surface cross-striolate below, papillose above, trabeculate at back; endostome with a high, finely papillose basal membrane, segments papillose, keeled, perforate, cilia papillose, in groups of 1-2, nodulose. Spores spherical, slightly roughened, 9-14 µm diam. Calyptrae cucullate, naked, smooth.

Discussion

2. Haplocladium angustifolium (Hampe & Müll. Hal.) Broth, in Engl. & Prantl, Nat. Pflanzenfam. 1(3): 1008. 1907; Hypnum angustifolium Hampe & Müll. Hal. in Müll. Hal., Bot. Zeitung (Berlin) 13: 788. 1855; Thuidium angustifolium (Hampe & Müll. Hal.) A. Jaeger, Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1876-77: 252. 1878; Pseudoleskea angustifolia (Hampe & Müll. Hal.) Paris, Index Bryol. 1033. 1898; Bryohaplocladium angustifolium (Hampe & Miill. Hal.) R. Watan. & Z. Iwats., J. Jap. Bot. 56: 259. 1981. Plate 78, figures 12-19 Discussion. Haplocladium angustifolium is distinguished by its small size and lanceolate branch leaves. The cells are prorulose at the upper ends. Although a long-recognized species, previously it was reported only from the West Indies by Watanabe (1972), on the basis of a single Jamaican specimen, and more recently in the Mexican moss manual (Sharp et al., 1994). It is common at high elevations in Hispaniola. The species was described from South Africa, and although I have not seen the type specimen, other material from that region is indistinguishable from Antillean collections.

Distribution

Range. Southwestern United States, Mexico, southern Europe, central and southern Africa, eastern Asia, Himalaya; Jamaica, Hispaniola (Haiti and Dominican Republic); growing on old wood or occasionally soil, in open, mesic forests or exposed areas, at (1300-) 1500-2350 m.

United States of America North America| Mexico North America| Albania Europe| Andorra Europe| Croatia Europe| France Europe| Greece Europe| Italy Europe| Malta Europe| Montenegro Europe| Portugal Europe| Spain Europe| Turkey Asia| Africa| China Asia| Japan Asia| Mongolia Asia| South Korea Asia| North Korea Asia| Taiwan Asia| Pakistan Asia| India Asia| China Asia| Nepal Asia| Bhutan Asia| Jamaica South America| Haiti South America| Dominican Republic South America|