Timmia megapolitana |
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timmia moss |
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Habit | Plants without deciduous distal leaves. | ||||
Leaf | apex acute; costa subpercurrent; sheath clear or yellowish; limb green, pellucid; limb-sheath transition abrupt, not sharply angled; limb margins strongly dentate in distal half, with fewer and smaller teeth below, and a few small sharp teeth at limb-sheath transition; limb lamina cells (5–)7–16(–21) × (6–)7–12(–14) µm, with low rounded or flattened mamillae on the adaxial surface, abaxial surface smooth; abaxial surfaces of sheath lamina cells smooth or with 1–6 papillae over lumen; cells at leaf insertion not fragile and hyaline; abaxial surface of limb costa smooth (rarely papillose near leaf apex), adaxial cells with rounded or somewhat flattened mamillae. |
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Sexual condition | monoicous; perichaetial leaves narrower than vegetative leaves. |
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Capsule | plicate or puckered when dry; exothecial cells with non-sinuose walls; stomata on urn; endostome cilia with numerous spine-like or branched-stellate appendiculations on the interior surfaces. |
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Calyptra | with a median longitudinal split, sometimes persistent on the neck of the capsule or seta. |
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Timmia megapolitana |
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Distribution |
HI; North America; Eurasia; n Africa; Atlantic Islands (Iceland)
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Discussion | Subspecies 2 (2 in the flora). Timmia megapolitana is a distinct species within the genus, separated by its monoicous sexuality, distinct but pale leaf sheaths, and elaborately appendiculate endostome cilia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 27, p. 167. | ||||
Parent taxa | Timmiaceae > Timmia | ||||
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Name authority | Hedwig: Sp. Musc. Frond., 176. (1801) | ||||
Web links |