The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

bartramia moss, straight-leaf apple-moss, straight-leaf bartramia

apple moss bartramia, apple-moss, bartramia moss

Habit Plants in lax to dense tufts, soft green to glaucous. Plants in lax to dense tufts, green to glaucous, sometimes yellowish green.
Stems

1–3(–5) cm.

0.5–8 cm.

Leaves

stiffly erect when dry, spreading when moist, linear, 4–5 mm;

base sheathing, shoulders well developed, firm;

margins plane, serrulate to serrate distally, teeth paired distally;

apex acuminate, subulate;

costa excurrent, obscure in distal limb;

basal laminal cell walls thin;

medial and distal cells 25–45 × 5–7 µm, prorulae relatively low.

flexuose to crisped when dry, laxly erect to erect-spreading when moist, narrowly lanceolate to linear, 4–7 mm;

base scarcely sheathing, shoulders well developed, firm;

margins revolute, coarsely toothed distally, teeth paired;

apex subulate;

costa excurrent, prominent, distal abaxial surface rough;

basal laminal cell walls thin;

medial and distal cells 4–15 × 4–8 µm, prorulae high.

Seta

0.8–3 cm, straight.

0.5–2.5 cm, flexuose.

Sexual condition

synoicous;

perichaetial leaves somewhat longer than stem leaves, 6 mm, more strongly clasping.

autoicous or synoicous.

Capsule

inclined, subglobose to ovoid, asymmetric, 1 mm;

operculum short-conic;

peristome double;

exostome teeth 300–400 µm, strongly transversely barred, finely papillose proximally, smooth distally;

endostome basal membrane present, segments 1/2–2/3 length of teeth and somewhat adherent to them, smooth, cilia absent or rudimentary.

inclined, globose to ovoid, asymmetric, 1.5–2.5 mm;

operculum conic convex;

peristome double;

exostome teeth 375–450 µm, granulose-papillose throughout;

endostome basal membrane high, segments somewhat shorter than teeth, finely seriate-papillose, cilia rudimentary.

Spores

25–40 µm.

20–26 µm.

Bartramia ithyphylla

Bartramia pomiformis

Phenology Capsules mature Jul–Nov. Capsules mature Feb–Nov.
Habitat Soil, rock Soil, rock, base of trees, downed trunks, moist shady forests
Elevation low to high elevations (0-3800 m) (low to high elevations (0-12500 ft)) low to moderate elevations (0-1100 m) (low to moderate elevations (0-3600 ft))
Distribution
from FNA
AK; CA; CO; ID; ME; MI; MT; NH; NV; OR; UT; WA; WY; AB; BC; NB; NL; NU; QC; YT; e Asia (Taiwan); n Africa; Greenland; Europe; s South America (Argentina); c Africa
[WildflowerSearch map]
from FNA
AK; AL; AR; CA; CT; DC; DE; GA; IA; ID; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NY; OH; OK; OR; PA; RI; SC; SD; TN; VA; VT; WA; WI; WV; BC; NB; NL; NS; NU; ON; QC; SK; c Asia; n Africa; e Asia; Greenland; n Asia; Europe; s South America (Tierra del Fuego); Atlantic Islands (Madeira)
[WildflowerSearch map]
Discussion

Bartramia ithyphylla is essentially an arctic-alpine species with disjunct populations in austral South America and the high mountains of Africa. In the flora area, the species frequents tundra and montane forest habitats with occasional occurrence at low to moderate elevations at northern latitudes. The glistening white leaf base is distinctive. The obscure costa in the distal limb and elongate distal laminal cells bearing low prorulae distinguish B. ithyphylla from other small species of the genus in the flora area. The distal leaves are sometimes divergent. Reports of Bartramia breviseta Lindberg [B. ithyphylla var. breviseta (Lindberg) Kindberg by some authors] from high elevations in Colorado likely represent misidentifications. In B. breviseta the capsules are overtopped by the perichaetial leaves (the seta is 1–3 mm), and the costa fills the acumen. As presently understood, B. breviseta is an arctic-alpine species of the Old World.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Bartramia pomiformis can be distinguished from the similar B. halleriana by the combination in the former of narrowly lanceolate to linear-lanceolate leaves, often crisped or flexuose when dry, together with the elongate seta that usually lofts the capsule above the foliage.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 28, p. 104. FNA vol. 28, p. 102.
Parent taxa Bartramiaceae > Bartramia Bartramiaceae > Bartramia
Sibling taxa
B. brevifolia, B. halleriana, B. pomiformis, B. potosica, B. stricta, B. subulata
B. brevifolia, B. halleriana, B. ithyphylla, B. potosica, B. stricta, B. subulata
Synonyms B. ithyphylla var. breviseta, B. ithyphylla subsp. rigidula B. circinnulata, B. crispa, B. glaucoviridis
Name authority Bridel: Muscol. Recent. 2(3): 132, plate 1, fig. 6. (1803) Hedwig: Sp. Musc. Frond., 164. (1801)
Web links