Most bromeliads belong to the phytotelm type with
rosulate ramets (spiny rosette-forming plants) where enough leaf litter and rainwater accumulate to support a varied fauna, including small amphibians, arachnids and insects (DEJEAN; OLMSTED, 1997; DIAS; BRESCOVIT, 2004; LAESSLE, 1961; WHEELER, 1921, 1942; WITTMAN, 2000).
It is obvious that the "herbaceous habit" also include nidiform, calathiform,
rosulate, and scandent corms, but these forms are uncommon or not found in Blechnum.
Leaves 17 to 20 in number, coriaceous, densely
rosulate, suberect, forming a funnelform rosette; sheaths ovate, 12-17 x 9.5-10 cm, inconspicuously lepidote, green toward the apex, strongly coriaceous; blades narrowly subtriangular-lanceolate, not narrowed at the base, 15-24 x 5-6 cm, green, inconspicously and sparsely white-lepidote mainly adaxially to glabrous, nerved, suberect with recurved apex, apex acuminate.
2 C-D) is a saxicolous plant with
rosulate leaves, 60 cm long, 2 cm wide.
Leaves radical as well as cauline; radical ones
rosulate, linear to oblong-oblanceolate, 5-10 X 0.5-1.5 cm, entire-crenate, cormate at base, slightly reflexed at margins, single veined, acute; cauline leaves, opposite decussate, smaller, in pairs, linear-oblong, 2-5 X 0.3-0.6cm, entire, acute, reflexed at margins, each pair connate at base and forming a 0.4-1.0 cm long tube.
- Pink sundews are small,
rosulate, evergreen, perennial, insectivorous forbs, common in wet savannas, bogs and ditches in the coastal plain of the southeastern USA (Schnell, 1976).
For each species the following characteristics were determined: physical habitat (terrestrial or epipetric), ecological habit (transient or resident) and the biological forms: herbaceous (erect, rhizomatous, creeping,
rosulate, and caespitose), shrubby (erect, scandent and
rosulate), arboreal, climber, and accidental herbaceous (
rosulate), according to Mueller-Dombois & Ellenberg (1974).
Other frequent species within this vegetation-type are the succulent halophytes Arthrocnemum macrostachyum and Limbarda crithmoides; the
rosulate hemicriptophytes Limonium cossonianum, Limonium caesium, and Limonium santapolense, and other halophytes such as Halimione portulacoides or Frankenia corymbosa.
Plant saxicolous,
rosulate herb, forming large colonies, flowering 0.80-1.8 m tall, the rosettes zygomorphic in mature plants, 30--90 cm long.
Leaves alternate to rarely opposite,
rosulate, clustered at the branch apices to clustered in the axils of the old leaves; petiolate, sessile to sheathing at the base; blades entire, lyrate, pinnatisect to pinnately compound, unarmed to spiny, pinnately, palmately to three-veined, rarely parallel-veined, glabrous to pubescent.
nivalis, such as habitat (from areas above the tree line usually at altitudes well above 2000 m a.s.), growth habit (
rosulate herbs < 10 cm in height, with well-developed rhizomes), leaf morphology (leaves < 10 cm long, with pinnatifid to pinnate blades) and floral morphology (flowers axillary, erect and solitary; sepals reduced and inconspicuous; corollas white, half to full spreading; nectar scales contrastingly coloured yellow to orange, with three dorsoventrally flattened dorsal threads, attached to the distal-most third of the scale's back).
Leaves 15 to 18 in number, subspreading-arcuate to distinctly recurved, densely
rosulate and forming a distinct rosette before the anthesis and afterwards; sheaths inconspicuous; blades narrowly triangular, long attenuate-caudate, 30-58 cm long, 3-4.5 cm wide at base, ca.