Tropicos | Name - !Bryoerythrophyllum jamesonii (Taylor) H.A. Crum

Cent. Amer. Moss > Pottiaceae > Bryoerythrophyllum > Bryoerythrophyllum jamesonii

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!Bryoerythrophyllum jamesonii (Taylor) H.A. Crum

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Project data (Last Modified On 2/15/2011)

Discussion:

Bryoerythrophyllum jamesonii is an Andean species also found in southern Mexico and Guatemala. It is a medium-sized species with oblong-lanceolate leaves having plane, dentate upper margins, and long-rectangular basal leaf cells. In Central America it can be confused with B. recurvirostrum or B. campylocarpum. Bryoerythrophyllum recurvirostrum differs from it in having leaf margins recurved to near the apex, and thin-walled, bulging basal leaf cells. Bryoerythrophyllum campylocarpum is a smaller plant than B. jamesonii and its leaves are less clasping. In addition, its costa at back is densely papillose, and its smooth basal leaf cells are enlarged and bulging toward the inside but long, narrow, and firm-walled at the margins.

Mironia ehrenbergiana is very similar to B. jamesonii, but differs in having bistratose leaf margins.

Illustrations: Herzog (1909, Fig. 9 as Leptodontium albovaginatum); Thériot (1936, Fig. 8 5–8 as Leptodontium subplanifolium); Sharp et al. (1994, Fig. 205); Churchill and Linares (1995, Fig. 152 g–k). Figure 17.

Habitat: On soil over rock; 2900–3300 m.

Distribution in Central America: GUATEMALA. Quezaltenango: Standley 86145 (F). COSTA RICA. Cartago: Holz 00-733 (GOET, MO).

World Range: Mexico; Central America; Western South America.

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Bryoerythrophyllum jamesonii (Tayl.) Crum, Svensk Bot. Tidskr. 51: 200. 1957.

Barbula jamesonii Tayl., London J. Bot. 5: 48. 1846. Protologue: Ecuador. On Pichincha, near Quito, October, 1827, Prof. William Jameson, (Dr. Greville’s Herbarium) (NY).

Syrrhopodon jamesonii Tayl., London J. Bot. 6: 331. 1847. Protologue: Ecuador. On Pichincha; Prof. W. Jameson, Nov. 1846.

Leptodontium albovaginatum Herz., Beih. Bot. Centralbl. 26(2): 61. 1909. Protologue: Bolivia. An humusbedectken Felsen der “Estradillas” bei Incacorral (Prov. Cochabamba), ca. 3000–3200 m; Januar, 08. [Herzog].

Leptodontium subplanifolium Thér., Rev. Bryol. Lichénol. 9: 17. 1936. Protologue: Ecuador. Pichincha, talus près d’un torrent ([Benoist] n° 3241, 3085); Broussailles du Pichincha, sur la terre, 3.000 m, ([Benoist] n° 3189); Rumipamba, à terre dans les broussailles, 3.000 m, ([Benoist] n° 2896).

Plants medium-sized, reddish green to reddish yellow, to 25 mm high. Stems red, erect, irregularly branched, sclerodermis and central strand present; rhizoids red, smooth, at times on upper ventral costal surface near apex . Leaves 2.0–2.5 mm long, erect-sheathing at base, erect-twisted and incurved when dry, erect-spreading to spreading when wet, oblong-lanceolate; apices broadly acute, apiculate; margins unistratose, weakly reflexed below, plane above, distantly dentate above, not bordered, not to weakly decurrent at base; costa percurrent to short-excurrent, smooth at back, ventral superficial cells rectangular, guide cells and two stereid bands present, upper ventral epidermal layer somewhat enlarged, smooth or papillose; upper cells 8–12 x 4–14 μm, firm-walled, oblate to irregularly quadrate, densely pluripapillose by thick, c-shaped papillae, inner basal cells lightly and irregularly pluripapillose, rectangular, firm-walled and not bulging, 16–40 x 6–8 μm, grading into shorter outer basal cells, alar cells not differentiated. Dioicous. Perichaetia terminal; perichaetial leaves elongate, sheathing. Setae 1–2 per perichaetia, smooth, 12–20 mm long, red. Capsules cylindric erect to slightly inclined near mouth, 3.0–3.5 mm long, suboral ring differentiated in 2–3 rows; exothecial cells rectangular; stomata in neck; opercula erect, long-conic, 1.5 mm long; annuli deciduous, of 1–2 rows of vesiculose cells; peristome of 32 erect, whitish yellow, filamentous, densely spiculose teeth, to 600 μm long, basal membrane absent. Spores 10–14 μm, slightly papillose. Calyptrae not seen.