Which kingdom do mosses belong to

Option 1 Plantae. Option 2 Protista. Option 3 Monera. Option 4 None of these. Correct Answer Plantae. Ab aap Whatsapp pe solutions paa saktey h, hum aapko ping karenge. Study Materials. Why use Doubtnut? Instant Video Solutions. Request OTP. Updated On: Share This Video Whatsapp. The gametophytes of mosses in the family Pottiaceae are typically short-stemmed, tufty plants, often growing gregariously and in harsh, exposed habitats.

Examples, other than Goniomitrium , are Tortula princeps and Trichostomum brachydontium. That's not to say that all short-stemmed, tufty mosses of harsh habitats are members of the Pottiaceae.

Gigaspermum repens Gigaspermaceae, Funariales is a good counter-example. It's also not the case that all members of the Pottiaceae have short, tufty gametophytes.

The stems of Triquetrella papillata can grow to several centimetres in length and branch so that the gametophytes grow as mats on the ground.

However, long stems in mat-like growth are far more characteristic of the orders Hookeriales and, especially, the Hypnales. The latter is a large order with several thousand species. The order's name is derived from the genus Hypnum in the family Hypnaceae and here is a small but dense mat of Hypnum cupressiforme.

This photo shows a loose mat of Brachythecium salebrosum Brachytheciaceae, Hypnales growing in a lush lawn at Old Parliament House in Canberra and here is a well-developed mat of Thuidium cymbifolium Thuidiaceae, Hypnales growing on a roadside embankment on Norfolk Island.

From the example of Papillaria you've already seen that, rather then being confined to mat-like growth, members of the Hypnales can also grow as curtains. Most members of the Bryopsida have spore capsules with peristome teeth. In Gemmabryum dichotomum the teeth are well-developed but in Tayloria gunnii they are rather small. By contrast the spore capsule of Physcomitrium pyriforme Funariaceae, Funariales lacks peristome teeth.

The classification uses the nature or absence of the peristome teeth to help define the moss orders. One of the Gemmabryum dichotomum spore capsules is still in the process of shedding its operculum , the cap that covers the capsule mouth in developing spore capsules. You can see the annulus , a connecting ring of tissue between the operculum and the capsule, in the process of being shed. The classification explicitly uses the presence of a well-differentiated annulus to help define some moss orders.

As noted above the gametophytes of the members of the Polytrichales are generally quite robust. Polytrichaceae is the only family in this order. The gametophyte stems may be anything from just a few centimetres in height to over 60 centimetres in some species.

Stems of some aquatic mosses can be quite long, but the Polytrichales are terrestrial mosses with free-standing stems. Here is a photo of a few plants of the genus Dawsonia. Here is a mass of Dawsonia plants, with a human for scale. There are some robust mosses that are not in the Polytrichales. One such is the tropical genus Spiridens Spiridentaceae, Rhizogoniales, Bryopsida where the stems can grow to over 30 centimetres in length.

However, the stems of Spiridens grow horizontally to slightly pendulously, unlike the upright growth in the Polytrichales. No comments:. Newer Post Older Post Home. Subscribe to: Post Comments Atom.

Calliergon cordifolium - heart-leaved spear moss Courtesy Koen Vandekerckhove.