| 41. | It produces a thick thallus and ( usually ) lacks rhizohyphae and ascending thallus margins.
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| 42. | The whole thallus sometimes intricately branched throughout.
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| 43. | Their abundance is conspicuous when the thallus is sectioned and examined under a dissecting microscope.
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| 44. | Pigmentation is weak near base of thallus.
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| 45. | The species'name thus refers to its uncommon dark gray colouration of its thallus.
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| 46. | The term thallus is also commonly used to refer to the vegetative body of a lichen.
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| 47. | This stage usually grows as a thin cell of the thallus usually contains just one chloroplast.
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| 48. | Depending on whether the thallus morphology.
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| 49. | In a classification presented by level of organization of the thallus, there are seven orders:
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| 50. | The thallus cells often contain more than one chloroplast, as opposed to other hornwort genera.
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