Plant forming clumps, with dense roots growing on rocks, a single plant with long stem, in the basal part many branches, up to 20-50cm long, in diam. 7 to 10cm, hanging, the top bent upwards.
Leaves in large numbers, laxly polystichous, Internodes about 5mm, sticking out horizontally at an angle of about 90°, 4 to 7cm long, very fat and succulent, grey.
Sheath distinct, 10-15mm long, 8 to 12mm wide, broad-triangular, erect and covering and hiding the stem, white at the base, very thin and glabrous, then leatheryand on both sides grey lepidote.
Blade 4-6 cm long, 4 - 5 mm wide over the sheath, triangular acuminate, abaxial convex, canaliculate, the edges bent, green, on both sides densely fine grey appressed lepidote, therefore appears grey.
Scape exceeds the leaves, 3 to 4cm long, slim, glabrous, bright-green, upright, sticking out horizontally, or a little bent.
Scape bracts laxly imbricate, leaving the scape somewhat visible, 2cm long, elliptical, acute, green, dense lepidote, the edges violet lined.
Inflorescense exceeding the leaf-rosette, simple, 3-5cm long, 1.5-2cm in diam., sublax with 3-8 polystichous flowers, the bent green glabrous axis often somewhat visible.
Flower bract 1.5-2cm long, 7-12mm wide, distinctly exceeds the sepal, elliptic cuspidate, the apex acute, the tip of some keeled, red-green or red, membranous with hyaline edges, nerved, adaxial glabrous, abaxial the tip somewhat fine-lepidote.
Sepal 1.1–1.5cm long, 3-4mm wide, lanceolate acute, bright-green or pink, membranous, nerved, the posterior pair keeled and 2/3 or 4/5 high connate.
Petal 2.4–3.3cm long, the blade 5–7.5mm wide, with wavy edges, roundish, narrowing to 3mm at the base, the tips rolled outwards, white.
Filament 1–1. 2cm long, 0.7mm wide, ribbon-like, with many waves, white,
Anthers 1.5-2mm long, 0.5mm wide, linear, basifix, bright-yellow,
Style to 9mm long, 0.4–0.5mm in diam., white,
Stigma upright, small, hardly wider than the Style with spreading lobes, white.
Ovary 2–2.5mm long, 2.5mm wide, oval, bright-green.
Type: Brazil, Estado Rio de Janeiro close to the border to Espirito Santo, north from Campos, Morro do Côco, lithophytic,leg. Reinhold Thieken 1983. Holotype:WU.
Both these plants are linked to T. tenuifolia in the broad sense but whether they are worthy of species status has yet to be decided.
T. cocoensis was originally found by Reinhold Thieken in 1983 in Brazil, Estado Rio de Janeiro close to the border to Espirito Santo, north from Campos, Morro do Côco, as a lithophyte.
T. moraisensis was originally found in Brazil, State of Rio de Janeiro, North and to the east of Nova Friburgo, Trajano de Morais EB8113 and Santa Maria Madalena, by. Klaus and Renate Ehlers, August, 1981, EB8114.
T. ‘Moraisensis’ differs from T. ‘Cocoensis’ by plant being bigger, much shorter stems however plant 2 - 3 times as wide. Leaves longer, Blade much longer and more narrow with long tapered tip, less succulent. Petal edges less wavy.
Are the plants still alive in habitat? Nothing seems to have been reported by Brazilian botanists in this 36 year long hiatus or did they consider them as being T. tenuifolia. There are over 500 specimens listed in REFLORA http://reflora.jbrj.gov.br/reflora/PrincipalUC/PrincipalUC.do as T. tenuifolia, but I could find none linking to Morro do Coco or even Santa Maria Madalena!
As far as cultivation goes T. cocoensis arrived in Australia in 1991 followed closely by T. moraisensis in 1993. They certainly liked Adelaide conditions because they flowered and offsetted.
Somehow, T. cocoensis found its way to Rainforest Flora in California and is freely available in the USA.
The future may see these plants described under ICN rules with obligatory herbarium specimens but at the moment the names are recorded as cultivars in the BCR. If this ever happens the ICN naming would take precedence. So in the meantime they should be referred to as Tillandsia ‘Cocoensis’ and T. ‘Moraisensis’