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Most characteristic when making large, dense, and extremely tough tussocks, with the long stems splaying out.
Very variable: beware forms in seepage areas which can be almost as slender, and as open and 'wispy', as T. cespitosum, Northern Deergrass (see the ⇒Identification pages). Of course these small forms can be confidently identified by closer inspection.
The ⇒Hybrid Deergrass also can appear very similar – bridging the gap between the species – and you need to look more closely to separate them with confidence. Again, see ⇒Identification pages).
See the dedicated pages, ⇒Field identification ~ 1 and ⇒ ~ 2 for much more detailed information.
Although externally similar, the two deergrass species are very distinct in their internal morphology, and readily separable: these are two good species!
Frustratingly, the widespread ⇒hybrid bridges the gulf between the two.
Remember that from July onwards the hybrid has ‘bare stem-tops’ at this time because it never ripens nuts, whilst the two species carry ripe nuts (but only if pollination has been successful! - in some seasons fruiting can fail over large areas).
The two species can be confirmed with a high degree of confidence by examination of their ⇒stem cross-sections.
Drier heath communities in particular are likely to harbour this species alone (rather than the hybrid or Northern Deergrass), although more work needs to be carried out to establish the limits of the hybrid's tolerances versus this species in UK.
In damper mire habitats, the hybrid is also likely to occur, and in some basin- and raised mires the hybrid greatly outnumbers either species.
The situation on blanket-bog is confusing, and I can offer little advice except to get out there and find out! Some disturbed blanket-bogs carry the hybrid; whether this reflects the former (or even present) occurrence of Northern Deergrass in nearby mires is unclear to me. In all cases, the hybrid will tend to follow seepage-lines.
See Andy Amplett's very clear note in BSBI News, No. 119, pp. 37–39 (January 2012), describing this species' habitats in Speyside, along with comments on the other two taxa.
T. germanicum is a typical member of the mire communities M15 to M20, and also on upland heaths such as H10 and H12, and even high altitude U7.
(See A. Amphlett, BSBI News, No. 119, p. 37 (January 2012), here.)
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