Tillandsia erecta
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Tillandsia erecta
See DI02/14: A Key to Tillandsia subgroup diaphoranthema.
Nanette Collingwood 08/15

Tillandsia erecta - Derek Butcher in Bromeliaceae 1998 #6 p9

April/May is that time of year when few Tillandsias want to flower, but it is the time to expect T. crocata with its bright yellow flowers and delightful perfume to perform. Also we see the bright blue of T. bandensis and at this time of year we can also expect a grey petalled flower in similar shape to the flower on T. bandensis and having 3-4 flowers per inflorescence. The plant although similar in shape is a bit smaller. No doubt you have this plant as T. erecta.

The interesting part is that this plant is NOT Tillandsia erecta but is certainly a hybrid with one of the parents being T. bandensis.
A true T. erecta is a smaller plant with an inflorescence having only one erect flower. The petals are a dirty yellow and remain erect, rarely opening.
Back to our grey petalled plant hereafter referred to as Tillandsia 'Grey Power' for obvious reasons. I have considered Queensland Blue for equally obvious reasons because this problem originates in Queensland and the trail peters out there. They are very good poker players up there! The plant was in existence in Queensland before Rolly Reilly started his seed raising campaign but I could not find out if the plant had been imported or grown from imported seed.

While a cross between T. bandensis and T. crocata would probably produce grey flowers, hybrid vigour would probably ensure a larger plant than either of its parents. In this case the plant is slightly smaller than T. bandensis so I felt the other parent had to be smaller too. It could even be T. erecta but more likely T. funebris (its very close cousin!) if it were a natural hybrid.
I could find no reference to a hybrid occurring in this situation either man made or natural. I wrote to Dr. Walter Till of Vienna who is the world authority on these extra small Tillandsias. He confirmed my views on it being a hybrid and suggested another possible parent T. myosura. He was unaware of this plant as a natural hybrid! I can assure you that this small plant with petals a delightful grey, offsets well and is widely spread in Australia. BUT, please change its name from T. erecta to T. 'Grey Power'. Perhaps it should have been retired years ago!
Fulham S.A.

Tillandsia erecta Gillies ex Baker, Jour. Bot. London 16: 239. 1878.
Tillandsia rigida Gillies ex Baker, Jour. Bot. London 16: 239. 1878; nomen.
Tillandsia erecta "Var. T. rigida" Gillies ex Baker, Handb. Bromel. 162. 1889; nomen illeg.
Desc from Till 1984
Plant to 11 cm long, with roots. Stem to 6 cm long, mostly simple
Leaves densely polystichous, to 5 cm long, hard and stiffly erect;
Sheath broad ovate, 5-10 mm long, glabrous,
Blade narrow triangular, acuminate, with distinct log stripes by way of sclerenchyma, about 4 mm wide at base;
Peduncle terminal, to 45 mm long, slender, glabrous, when dry strongly furrowed, mostly with 1 peduncle bract.
Peduncle bract elliptic, glabrous, ca 15 mm long;
Inflorescence 1-flowered, with long sterile rhachis
Flower bracts broad lanceolate, not tapering at the base, glabrous or in the upper 2/3 wholely laxly scaled, 6-9-nerved, blunt tipped, 12-13.5 mm long, 5.7-6.1 mm wide,
Sepals equally almost free or the posterior pair minimally somewhat higher connate, almost glabrous or wholely laxly scaled, broad lineal, to narrow triangular, blunt, 5-nerved, 10-11.5 mm long, 3-4 mm wide;
Petals broad tongue shaped, sometimes the tip a little wider, with raphides, tip rounded, 5-7-nerved, 9-12.5 mm long, 2.5-3 mm wide, dirty greenish yellow;
Anthers 1.9-2.8 mm long, 0.45-0.5 mm , Filaments basifixed, whitish, 1-nerved, 3.1-4.9 mm long, 0.2-0.25 mm wide;
Ovary inverted conical- cylindric, almost quickly narrowing to a robust style,
Style short, 1/5-1/3 as long as the ovary, and about 1/3 as wide as the ovary;
Stigma flat, disc shaped; Gynoecium 4.3- 4.6 mm long, 2-2.1 mm ,
Flower scent not strong.
Range; Mid Argentina, Andes of La Rioja and Mendoza. The reference in S&D (1977) to Bolivia seems to be linked with T. funebris or T. rectangula

Desc from S&D p881-2
Plants to 11 cm long; roots present; stem 3-6 cm long, simple or few-branched.
Leaves densely polystichous, to 5 cm long, cinereous, densely and coarsely pruinose-lepidote;
Sheaths broadly ovate, ca 5 mm long, glabrous within and at the extreme base outside;
Blades erect to spreading, very narrowly triangular, involute-subulate, rigid, nerved, angled toward apex, ca 4 mm wide.
Scape terminal, to 45 mm long, slender, strongly sulcate, glabrous, naked or with a single elliptic, glabrous bract ca 15 mm long.
Inflorescence of a single flower with the rhachis prolonged behind it.
Floral bract triangular-ovate, acute, 8-10 mm long, equaling or shorter than the sepals, glabrous, 7-10-nerved;
Flower subsessile.
Sepals lance-elliptic, acute, 10 mm long, glabrous or sparsely lepidote, nerved, equally short-connate;
Petals narrowly elliptic, yellow when dry, punctate;
Stamens deeply included, exceeding the pistil.
Capsule slenderly cylindric, ca 2 cm long, abruptly short-beaked.
Type. Gillies s n (holotype K, K photo), foot of the cordillera near Mendoza, Argentina.
DISTRIBUTION. Saxicolous and epiphytic, 1300-2610 m alt, Bolivia, Argentina. BOLIVIA. COCHABAMBA: Jatampata, 14 Mar 1965, Adolfo 265 (US). ARGENTINA. LA RIOJA: km 512 west of Sierra Famatina, 11 Jan 1956, Bocher, Hjerting & Rahn 2269 (C, US). MENDOZA: Potrerillos to Cacheuta, Castellanos s n (BA); Ranchillos, Uspallata, Castellanos s n (BA); La Atala, Ruiz-Leal 4449 (BA, LIL).

Updated 09/05/19