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Plants densely tufted, stems ± tomentose proximally |
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(2) |
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Plants loosely to densely tufted or gregarious; stems, if tomentose, only so at extreme base |
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(3) |
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2 (1) |
Stems 1-4 cm; leaves to 3 mm, from an ovate-sheathing base sharply contracted to the subula; costa abaxially strongly convex; lamina cells near costa with weakly nodulose longitudinal walls; plants commonly fruiting. |
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2 Ditrichum flexicaule |
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Stems to 7 cm or more; leaves from an elongate-ovate base tapering gradually to the long slender subula; costa abaxially weakly convex; basal laminal cells with weakly to strongly nodulose longitudinal walls; rarely found fruiting |
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3 Ditrichum gracile |
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3 (1) |
In cross section, distal leaf lamina partially 1-stratose with 2-stratose margins |
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(4) |
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In cross section, distal leaf lamina 2-stratose from costa to margins |
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(8) |
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4 (3) |
Leaves erect-appressed to erect-patent when moist |
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(5) |
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Leaves erect-spreading when moist |
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(6) |
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5 (4) |
Leaves oblong-lanceolate, widest proximally to middle, tapering to a blunt apex; lamina cells thin-walled, rectangular throughout, slightly shorter and narrower towards apex; seta to 2.5 cm, yellowish to orange-brown, erect; peristome teeth 200-220 µm, perforate, divided into 2 adhering filaments, finely papillose. |
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5 Ditrichum lineare |
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Leaves lanceolate to linear-lanceolate, gradually acuminate; lamina cells ± incrassate, subquadrate to short-rectangular distally, elongate-rectangular proximally; seta to 1.5 cm, reddish with age; peristome teeth 200-250 µm, the filaments finely and obliquely ridged and lightly papillose. |
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8 Ditrichum pusillum |
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6 (4) |
Stems fastigiately branched from base, dichotomous distally; leaves linear-lanceolate, margins subserrulate distally, apex coarsely toothed; seta to 2.5 cm, pale yellow; capsule straight and erect or slightly curved, orange- to dark red-brown at maturity, elliptical, narrowed at mouth, 2-3 mm, flattened when dry; peristome teeth 600-800 µm, spiculose-papillose; autoicous. |
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6 Ditrichum montanum |
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Stem branching distally from base; leaves lanceolate to linear-lanceolate, margins entire to serrulate distally, apex weakly toothed; seta shorter, 0.8-2 cm, red to orange-brown; capsule symmetric to slightly curved, 1-3 mm, not flattened when dry; peristome teeth 200-500 µm, papillose to spiculose; dioicous |
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(7) |
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7 (6) |
Stems to 2 cm, often branched; leaves 1.5-4.5 mm, apex entire or serrulate, margins broadly recurved from base to leaf middle; leaf cross section 2-stratose on margins and sometimes near costa; seta 1.5-2 cm, red; capsule usually symmetric, straight and erect, rarely curved, 1.5-3 mm long, dark brown to reddish; peristome teeth 200-500 µm, twisted when dry. |
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1 Ditrichum ambiguum |
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Stems to 0.5 cm, seldom branched; leaves 1-3 mm, apex serrulate, margins plane or narrowly recurved from above leaf base to leaf middle; leaf cross section 2-stratose only at or near margins; seta 0.8-1.2 cm, orange-yellow, brownish or reddish; capsule usually asymmetric, erect, curved, 1-2 mm, yellow or light brown; peristome teeth 200 µm, nearly straight. |
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11 Ditrichum tortuloides |
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8 (3) |
Stem leaves 1.5-3 mm, from an ovate to oblong base gradually tapered to a channelled subula, erect-patent to subsecund; dioicous. |
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4 Ditrichum heteromallum |
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Stem leaves longer, 3-7 mm, long-subulate from an ovate to short-rectangular base, spreading, flexuose to subsecund; autoicous |
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(9) |
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9 (8) |
Leaves to 5 mm; seta to 2.5 cm, orange-yellow, becoming reddened at maturity; capsule ovoid-cylindric, ± asymmetric and slightly curved, pale brown, suberect, flattened when dry; peristome teeth to 1500 µm, densely spiculose-papillose; spores yellow-brown, 11-19 µm, vermicular papillose-verrucose |
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9 Ditrichum rhynchostegium |
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Leaves 3-7 mm; seta 1-3 cm, yellow or becoming reddish brown at the base when mature; capsules subcylindric to cylindric, not flattened when dry; peristome teeth to 800 µm, finely papillose to spiculose-papillose; spores brown, 15-30 µm, coarsely roughened-papillose |
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(10) |
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10 (9) |
Leaves long-subulate from a short-ovoid sheathing base; seta to 2.5 cm, yellow, becoming reddened at the base with maturity; capsule suberect, subcylindric, 1-2.5 mm; peristome teeth pale brown to orange-brown, 300-800 µm, spiculose- papillose; spores 15-30 µm. |
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7 Ditrichum pallidum |
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Leaves narrow filiform-subulate from an ovate-lanceolate sheathing base; seta 1-3 cm, yellow; capsule cylindric, 1.5-3 mm; peristome teeth pale yellow-brown, to 300 µm, irregularly perforate, finely papillose; spores 20-30 µm. |
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10 Ditrichum schimperi |
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